SEARCHABLE NBTV NEWSLETTER INDEX BY KEITH VICKERS G1NAF IN RTF FORMAT UPDATED BY CHRIS LEWIS G6ACL

This index covers the original Ideas Sheets (red book), Volume 2 and 3 (green book) and NBTV Newsletters up to present day.

This copy is in MS-WordPad .RTF format and is usually able to open at the same time as the .PDF archive files, allowing the index to be minimised and consulted as needed without need for repeated openings.   It MAY also be readable on a Mac.  A PDF text version is also published as it can be zoomed to any text size.  Note that only one acrobat reader can normally be open, but you can use one of several free readers although some will not read these non-Adobe. PDFs or allow text search. 

Search for a word, name, subject or part thereof using the built-in SEARCH/FIND facility in your reader.

Please note that each of the black and white Newsletters (up to Volume33/3) has the index for that issue added on the first page.  Due to changes in the production process, the later colour volumes do not have an added index, however the text of these PDF files is searchable.

Each item is commented to allow you to search for a subject, author, device, etc, where this may not be self-evident from the Contents entry. In this way you can frequently find information without need to physically search every likely newsletter. Some items, such as sale of parts, reports on activities, wanted items or notices of meetings etc are long obsolete and therefore may be omitted. Some are left in as they may be of interest historically or as sources of information.

Although every care has been taken with the creation of this index, complete accuracy with information, spelling and typing cannot be guaranteed, for which my apologies.  Please search for words using alternatives if you don’t find them. Use unusual letter combinations if you can, e.g., use ‘email’, ‘e. mail’, ‘e-mail’, ‘e – mail’ or even ‘ail’ to help you find a reference.   Remember, some words may or may not be hyphenated (with/without spaces) in different articles.  Leading or trailing spaces may also help to narrow the search.

Before you build something, search for modifications or corrections in later issues using ‘ERRAT’ for errata/erratum and ‘MOD’ for mod/modification. Also search for possible DANGER or WARNING notices in later issues.

NBTV Newsletter Volume 1
These two years of Ideas Sheets 1-26 from 1973-75 were published by the NBTVA in 1981 as 'LDTV Hints and Kinks' available from NBTVA sales.   They were extensively re-edited by Gert-Jan Bartstra, Groningen, Netherlands.

Foreword by Doug Pitt and diagram of mirror-screw projector etc.
[1-3] Editor's Preface  by Gert-Jan Bartstra, secretary of Dutch "Grofraster TV Groep".
[4] Illustration of CRT display.
[511] Introduction to NBTV, a little NBTV history, standards, the NBTVA organisation and its presidents etc, etc.
[12] List of electronic and NBTV abbreviations.
[13-14] LDTV Ideas Sheet No.1   Dave Sumner's and Sam Shulman's methods of recording slides with up to TEN photo-transistors!
[15-16] Ideas Sheet No.2   Automatic bias for a neon display and use of perforated small foil patches on Nipkow disc.
[17-18] Ideas Sheet No.3   A negative EHT supply circuit for the 931A PMT and a solar-cell pre-amp circuit, with illustration of the camera.
[19-20] Ideas Sheet No.4    Andrew Cornish comments on his mods to a small portable TV for NBTV.  Alan Short reports on his disc camera with an 1868 phototransistor, similar to the Ideas Sheet 3 item and sends a diagram of a 12v to +400v (or +800v) inverter.   Sam Shulman hopes to build a sensitive camera with optical fibres.   Dave Sumner sends the circuit of a NBTV time base for a TV set.  N.B. The diode is shown the wrong way round.
[21-22] Ideas Sheet No.5   Bob Brookes is interested in Kerr cells.  Diagrams are given, with much very useful information.   Alan Short has greatly improved his disc scanner (see Ideas Sheets 3 and 4) with his diffuser changed for an excellent lens cast from Plasticraft plastic in a wine glass.
[23-24] Ideas Sheet No.6   Chris Long's 931A photomultiplier all-valve camera.  Complete circuit with suitable valve substitutes listed.
[25-26] Ideas Sheet No.7   Sam Shulman sends his idea for the negative Nipkow ("Wokpin") disc with examples of expected light responses.  Len Harriot has constructed a small double-spiral camera with a solar cell and one LED.  He is also working on a double-disc camera shown in block form on p26.
Derek Heydon (14) of County Kildare needs simple NBTV time-based circuits.    Making a "cog-wheel" sync wheel from plastic casting permeated with dense iron filings.  Easily magnetisable with little remanence.
[27-28] Ideas Sheet No.8   The use of photo-transistors for video sensors.   Sam Shulman reports on his fibre-optic disc and problems with brittle fibres with Doug Pitt's experiments and suggested improvements.  Also, illustrations of Doug's experiments with light-fibres.
[29-30] Ideas Sheet No.9   David Jones of Derbyshire is building a double-spiral combined camera-monitor and describes an ingenious method of disc-hole alignment.     Alan Short has completed his Mark V camera-monitor and is experimenting with a 48-line disc (the recommended SQUARE alternative picture standard).    Stan Kujawinski has nearly completed his over-life-size Baird Televisor using toothed-wheel sync.  Len Harriot continues his double-disc camera-monitor experiments.   Editorial comment on importance of keeping everything light-tight and painted black internally.
Chris Long is using his PMT camera and a CRT raster projected onto his face in a darkened room to produce excellent pictures.
Doug Pitt has completed his light-fibre disc and comments on efficiency and difficulties.
[31-32] Ideas Sheet No.10   Stan Kujawinski's successful line sync circuit.  This allows two units to be coupled via a twin flex for synchronising.   Full description with circuit and suggested possible mods.
[33-34] Ideas Sheet No.11   Notes on LED usage.   Light-guide picture pick-up idea as yet untested from Sam Shulman, with a number of pros and cons plus editorial comment.
[35-36] Ideas Sheet No.12   Photographing the Little Screen.   Methods outlined by Alan Short to capture the small, low-light images.   Harold J. Peachey has brought up the matter of copyright and the NBTVA has decided to issue a blanket copyright notice on behalf of all its contributors.   This still allows contributors to publish their own articles elsewhere.   Also notes on patents.
[36-38] Ideas Sheet No.13   Multi-spiral Discs.   Entire Ideas Sheet dedicated to discs - multi-spiral, various offsets, picture size doubling etc, with some diagrams.
[39-40] Ideas Sheet No.14   The Lens Disc.   Description and ideas for lens manufacture, with illustrations.   Ladislav Vig gives his opinions on suitability of CdS and solar cells.  At the time solar cells were very much an unknown quantity.
[41-42] Ideas Sheet No.15     Alan Short reports on his new 26swg aluminium disc for 48 lines.  There is also some editorial comment on behind-disc focussing methods.   Len Harriott is working on an improved double-spiral disc illuminated by a 'magic eye' valve.   Harry Peachey offers COLOUR nbtv slides for experimenters!  Stan Kujawinski and Doug Pitt have recently shown NBTV at the BATC show at Rugby.   Dennis Hodges G6MXY/T of Birmingham is awaiting publication of an article entitled "An Experimental LDTV System" in next issue (October?) of CQTV.
Fred Ward forecasts a bright future for LDTV as an amateur radio activity.   
[43-44] Ideas Sheet No.16   Derek Heydon of County Tyrone has built a 7" double-spiral disc.  Sam Shulman describes his Jeffree cell experiments and mentions a transistor version with a 470kHz ceramic "transfilter" resonator.  Unfortunately, no details or diagrams seem to have ever been published.
[45-46] Ideas Sheet No.17   Harry Peachey describes his simple gadget for accurate marking of Nipkow disc holes, with diagram.
The Jeffree cell and its operation is described, with mechanical and optical diagrams.  A circuit is also shown for a valve oscillator/modulator and reference is made to Sam Shulman's earlier work.
[47-48] Ideas Sheet No.18   Adapting a 405-line TV as a NBTV monitor.    Extensive notes and a diagram of a valve line oscillator from Andrew Cornish.
Proposed national LDTV meeting somewhere near Nottingham.
[49-50] Ideas Sheet No.19   Notification of first LDTV Convention venue etc.   Stan Kujawinski completes his mirror-drum camera and sends photo-transistor pre-amp diagram and mechanical diagrams, with description and comments.
Harry Peachey has constructed an optical bench for LDTV experiments, with description and diagrams.
[51-52] Ideas Sheet No.20   Setting-up of the LDTVA as an organisation with list of officers etc.
[53-54] Ideas Sheet No.21   Doug Pitt's circuit and full description of a very simple CRO adapter to display LDTV video.
[55-56] Ideas Sheet No.22   Report on Stan Kujawinski and Doug Pitt's talk on LDTV at the Midland Video HQ in Oldbury.
Ladislav Vig points out that his circuits in Ideas Sheet 14 are especially suitable for the 'Wokpin' discs described in No. 7.
Also, last year he did experiments in simple colour, with diagram and description.
Dave Sumner sends a circuit of a valve neon-lamp driver.
Charles Goring describes radial wobble on his disc and the possibility of using it to drive a light-fibre disc.
[57-58] Ideas Sheet No.23   Radio Retailers Exhibition (amateur radio rally) description - now moved to Northallerton(?).
News on gift of spare components by Johnny Brown G3LPB to the LDTVA and Doug Pitt's mirror-drum materials, accumulated technical data and possible use of 'Union Jack' type displays in place of a flat-plate neon lamp.
Also, brief reports by Chris Burkill and Mark Colclough.
[59-60] Ideas Sheet No.24    Doug Pitt's try-out of Sam Shulman's 'Wokpin' idea - he can't get the necessary negative candela generator to adjust for correct light bias!
Derek Heydon has completed a double-spiral camera-monitor and is having trouble concentrating the light onto his phototransistor.
Ladislav Vig has been experimenting with an extremely expensive (what are prices like now?) Reticon switched linear photodiode array, obtaining results comparable with a PMT.   He also advocates use of a fluorescent strip-light rather than a filament bulb for display and Doug Pitt supplies three suitable circuits.
[61-62] Ideas Sheet No.25    Dave Sumner reports on his lens-disc camera-monitor - still suffering problems - and sends the complete circuit (not shown) of a mechanical sync system.
Andrew Cornish has improved his CRT NBTV monitor of Ideas Sheet 18 and a Nipkow disc monitor using a magic eye valve, though results are dimmer than expected.   Doug Pitt describes the practicalities of mirror-drum scanning, with a diagram.
[63-64] Ideas Sheet No.26 Report on LDTV display at the Leicester Radio retailers' Exhibition.   Dave Sumner has greatly improved his mechanical display sync system - details to follow.
Stan Kujawinski thinks it would be a good idea to design a compact transistor LDTV deflection circuit for use with obsolete 405 TVs.
Last Ideas Sheet the End of an Era.  The end of frequent ideas sheets and the need for a compiled Ideas sheet compendium and subscribed formal newsletters.

NBTV Newsletter Volumes 2 & 3 April 1976 - April 1978
These two years were published by the NBTVA in 1983 as the 'Green Book' available from NBTVA sales.

Volume 2/1 April 1976
Power supply Discrete-part PSU (now rather outmoded) using AD161s giving +5v and +9v.
Chris Long reports from Australia on his NBTV equipment.
Video Cheesebox by Charles Goring.  Use of cheese spread box with holes in straight line,
 but mounted at slight angle to give raster scanned to left AND right, but it works!
Search for "BILLandBENVision" in later volume which uses related technique.
Other News.  Len Harriot’s 7" disc.
Universal Cathode Ray Receiver by Chris Long.  Valve design for LDTV flying-spot scanner system, with circuit diagram.
Synchroniser by Dave Sumner.  Mk II version for locking a DC motor to sync pulses, with circuit diagram.

Volume 2/2 
Slide Scanner.  Hints by Sam Shulman, with diagram of optics.
Reports.  Sam Shulman has been casting "Plastic raft" lenses, using gelatine moulds, and good hints on making true "point-source" LEDs.
Joe Bubez has discovered a new source of disc material - scrap litho plates used by printers.
Alan Short has been experimenting with large "pin hole" disc.
Dave Sumner has produced good sunlight pictures with a disc using 32 3/4" lenses.
Ladislav Vig sends sketch of scanning idea using rotating Perspex blocks.
Science Fair.  Among the exhibits three schools put on an LDTV exhibition.
Standards.  definition of NBTV standards recommendations.
LDTV on BBC TV by Stan Kujawinski and Doug Pitt on "Pebble Mill".
Video and Sync Mixers by Joe Bubez and Dave Sumner, with circuits.
NBTV Convention 1976.  Report.
Ham LDTV Two years of indifference and disappointment.
BATC Rally Notification.
Recommended Photodiode.  Stan Kujawinski reports that the BPW34 is a plastic-cased version of the BPX61.  9 sq. mm and 5MHz bandwidth.

Volume 2/3 1976
Comment on BBC TV programme "The Birth of Television".
Harry Peachey is recovering from serious illness and reports genuine Baird Televisor discovered in attic by Hasting’s resident.
Photos.  After complaints of poor reproduction, an amazing method of improvement has been discovered.
Motor Speed Control Idea.  Cog-wheel magnetic synchroniser, with diagram.
Copyright.  Preservation of rights of contributors against plagiarism.
BATC Convention in Leeds Sat Sept 18th Sept.  Report.
Balancing Scanning Discs.  Disc-balancing tips.
Radio Retailers' Exhibition 1976 Report
Reports on activities from Johnny Brown G3LPB and Peter J. Edwards.
Stan Kujawinski shows some basic mechanical details of his first camera.
Activity reports also from Chris Burkill, Alan Short, Peter J. Linsey, Joe Bubez and Doug Pitt.
Sam Shulman sends a diagram of a proposed device for scanning with NO HOLES!
Main Article, Issue Three.  Stan Kujawinski's PMT camera, with circuits.

Volume 2/4
Reports.  Alan Short has changed the lens system of his camera, with diagram.
Activity report from Paul Robbins.
Roy Prescott gives useful tips on marking-out a disk with a simple "spirograph", with diagrams.
Ladislav Vig has sent a sketch of the optics of his rotating Perspex block scanner/camera.
Len Harriot reports on his camera, with block diagram.

Volume 3/1 April 1977
Reports from Harry J. Peachey, Alan Short, Roy Prescott, Johnny Brown G3LPB, Derek Haydon, Ladislav Vig, Doug Pitt.  No diagrams.
1977 NBTV Convention.  Report, with comments on the problem of reliable sync pulses on taped NBTV signals.
CRO Raster Generator.  Reprint showing diagrams of simple generator using opto-triggered sync to drive timebases.  N.B. No disc rotation - no CRT scan.
Alan Short's 3-Transistor Pre-amp with OCP71 photo-tr and circuit diagram.
Making a Glass-Fibre Nipkow Disc by Paul Robbins.  manufacturing information.
An efficient LDTV Video and Sync-Pulse Mixer by Doug Pitt, with circuits.
Mechanical "Flywheel" Synchroniser by Alan Short, with diagram.
Stop Press.  Doug Pitt and Stan Kujawinski have successfully carried out a 13-mile NBTV transmission with excellent results, technical advisor Roy Prescott.
All-Electronic Checkerboard Generator by Ladislav Vig, with complete circuit diagram.

Volume 3/2
Video and Sync-Pulse Mixer, with Variable depth by Dave Sumner, with circuit diagram.
Variable Brightness LED Sequential Driver by Ladislav Vig.  Circuit using Siemens UAA170 I.C.s.
Recommended Circuits.  Ramp generator sent in by Len Harriot and Linearised ramp generator sent in by Andrew Cornish.  (Actually, they are BOTH linear).
Sync From Composite Signal recorded on Tape - Progress.  Alan Short is using 10% black bar, with circuit diagram.
Doug Pitt is using a Schmitt Trigger to re-sharpen edges of taped signals, then a HPF to separate line syncs.
LDTB Time base Generator by J. T. Bubez.  Analogue-digital hybrid, with circuit diagram.
Dividing by 32 by Doug Pitt using 7493s, with circuit.
Reports from Johnny Brown, including +12v/-700v PMT supply diagram using reversed mains transformer.  Diagram of probably very noisy photo-diode amplifier.
Joe Bubez has been experimenting with a modulated fluorescent tube - circuit enclosed.

Volume 3/3
Reports.  Neil Christall has built a disc-plus-neon receiver.  Circuit included.
Parallel-T tuned peak filter circuit for 1200Hz from Dave Sumner
Alan Short sends in a circuit of a line time-based magnetic deflection amp.
To Frame-Sync OR NOT to Frame Sync, That Is...   by Doug Pitt.  Article on several frame sync detection methods, with circuits.
Beginners Please part 1 by Roy Prescott.  Repeated in later newsletters.

Volume 3/4
Beginners Please part 2 by Roy Prescott.  Repeated in later newsletters.
Schmitt driver for 5 Volt Digital Divider by Ian Miles.  Obsolete circuit.
Reports on activities from Joe Bubez, Dave Sumner, Alan Short and Roy Prescott.
A Minimum-Labour Design for a Mirror-Drum by David Priestley.
Practical design using Meccano parts, with diagrams.
Mirror-Drums for LDTV by Doug Pitt.  Basics of how the device works, with diagrams.
Ally Pally Pressure Group.  C. G. Giles is on a committee trying to get Alexandra Palace turned into a museum when the BBC finish broadcasting from it in 1981.
Sync Circuit from Alan Short which appears to lock 555 timers I.C. to any signal in video around 400Hz and gives clean square-wave output.
Photos.  Example of mirror-drum by Dave Jones.
PMT camera by Stan Kujawinski.
Bead disc by Doug Pitt.
Disc-balancing device by Harry Peachey
Rotating-block scanner by Ladislav Vig.
Chris Long self-portrait by flying-spot technique.
Photo from disc by Alan Short.
Camera used for above photo by Alan Short.

Volume 4 Number 1 1978
[1] Comment   Editorial comment.  Low definition or narrowband TV?
[2] NBTV Convention   29th April 1978.  report including appearance by Gil Miles and talk on his NBTV experiments in 1930s.
[2] W W T T (World Wide Tape Talk) advertisement
[3] Ladislav Vig's electronic/mechanical display circuit.
[4] Mirror Drums (continued) by Doug Pitt.  Construction.
[6] Solar Cells for NBTV by Joe Bubez.  Cell info and practical circuitry.
[7] Books Worth Reading.  Two Baird books.
[7] NBTV Timebases by Alan Short.  Circuit for magnetic timebases.
[7] Information Wanted by Paul Robbins on Cossor 200 CRO transformer.
[8] Reports Joe Bubez on solar cell camera, Alan Short on solar cells, Dave Sumner has discovered report on use of neon lamps as photo-detectors - 1 million gain claimed!    Doug Pitt on solar cells and attempts to use PLL for sync recovery.  Stan Kujawinski starting on CRT display. Roy Prescott on frequency-tailoring NBTV signals.
[9] Beginners Please.  Improvements for 'Beginners Please' monitor by Roy Prescott.  Viewing screen and neon circuitry.
[10] Photo-News N.B. These early photo-copies were made on an ordinary 2-tone copier and hence are very poor quality.
Roy Prescott interviews Gil Miles VK2KI on early pioneer work in Melbourne.
Alan Short CRT display with weird spot-wobble.
[11] Two more monitors plus young enthusiasts.
[12] Fourth Convention photos.

Volume 4 number 2
[2] CRT Monitor by Joe Bubez   Full circuits and description.
[6] BATC   Convention announcement.
[7] Baird Exhibition at Hastings Town Hall.
[8] The NBTV System   by Dave Sumner.  Basic circuits sufficient to build a lens-disc camera.
[10] Obituary for H.J. Barton Chapple, best-known writer on television in the 1930s.
[10] WWTT World Wide Tape Club.  Advertisement.
[11] Photo-News.   Sam Shulman's 'rocking bracket' design.
Stan Kujawinski's 'sunflower' design mirror-drum.
CRT screen shot of Phonovision recording.
32-line CRT screen-shot from Ladislav Vig.
[12] Reports Johnny Brown G3LPB struggling to get decent display.   Dave Priestley making progress with his Meccano mirror-drum.  Roy Prescott planning to build a lens-disc camera with Proops' lenses.  Stan Kujawinski has now completed his new workshop.  Dave Sumner has built mirror-screw with aluminium strips Alan Short and Doug Pitt (see last issue) experimenting with PLLs for sync extraction.  Alan Short has supplied Gil Miles with tapes to check Australian-built apparatus.  Gil Miles making progress with planned exhibition in Sydney next January.  Joe Bubez having difficulties reconstructing his dismantled solar-cell camera.

Volume 4 Number 3
[2] Beginners Please by Roy Prescott.  Further details on beginners' monitor inc. construction, disc mounts, lenses etc.
[5] Simplicity Triumphant by Gil Miles.  JFET sync separator.
[5] Light Bias Device by Sam Shulman.  Sensor light bias details.
[6] NBTV Convention 28th April   notice.
[6] New-style newsletter.  Changes to presentation plus corrections to previous issue.
[6] High-impedance Amplifier.  Alan Short's bipolar design.  N.B.  Due to the antiphase feedback via the 22M resistor its apparent value is much lower, particularly at the HF end.
[7] Novel Motor Speed Control by Ladislav Vig.  Uses gearbox, record-player motor and generator - wow!
[7] World Wide Tape Talk advertisement.
[8] NBTV Timbase  by Alan Short.  Circuit for magnetic timebase.
[8] NBTV membership application form.
[9] Photo-News.  Gil Miles' universal standard CRT monitor, Ladislav Vig's rotating-block monitor, Convention 1978 camera and testcard by Roy Prescott.
[10] Photo-News.  1978 Convention studies.
Various characters and apparatus by Roy Prescott.
[11-12] Reports.  Alan Cornish - parts available.  Sam Shulman on his Jeffree Cell.  Doug Pitt on his 'Magic Box' CRO adaptor.
Roy Prescott on lens-disc camera.  Dave Sumner on light-sensitive neons and also considering reversed LED as photo-detector.  Ladislav Vig on his semi-mechanical display.    A. J. Quinton has evolved some very simple scanning devices.   Gary Bourgois  WB8EOH mentions an RCA self-scanning photo-diode matrix.  J. R. Franklin is upgrading his audio recording equipment in preparation for NBTV.   Alan Short has completed his Mk NINE camera, with high resolution - comments also on his new sync system.   Joe Bubez has conceived novel method of deriving sync pulses from disc without slots or holes - not yet tried.   Stephen Smith's NBTV work stopped by address change and his HV PSU failure.   Gil Miles VK2KI still busy with his exhibition.

Volume 4 number 4
[2] NBTV Staircase Generator  by Ladislav Vig.  Double-row multi-level grey staircase generator with circuit and description plus comments by Doug Pitt.
[3] Sync Seperator  by Gil Miles.  All-transistor circuit with diagram.
[4] Sync Pulses Without Tears  by Joe Bubez.  An (as yet untested) idea to produce blacker-than-black syncs by a simple mod without sync slots etc.  Description plus diagram.  Seems to make good sense and considerably simplifies electronics - worth a try.
[5] Computerised NBTV  by Stephen Smith.  Ideas gleaned from a recent Los Angeles exhibition.
[6] CRT Focusing Dodge  by A.J. Quinton.  Replacing focus coil with magnets.
[6] Offer by Ron Lucking  to machine small part for members.
[7] NBTV Convention Nottingham  Announcement for 28th April at Nottingham polytech, with directions.
[7] Attendance at the 1979 Annual Convention.  Form to notify attendance.  Dave Sumner and Roy Prescott have offered to act as regional representatives at Convention.  Gil Miles suggests an official test card for testing cameras at the convention.
[8] NBTVA Membership application form.
[9] Oscillating-Mirror image Scanner  by A.J. Quinton  Mechanical description with diagrams.
{10] Available to members  any components from Johnny Brown G3LPB.
[10] WWTT World Wide Tape Talk  Advertisement.
[11-12] Light-transmitted NBTV  by Paul Robbins.  Light-beam transmission system with circuits and PCB layouts, optics diagram.
[12] Peter Arnold Ltd  for all that's best in Hi-Fi.  Advertisement

Volume 5  Number 1  1979
[2] 1978 convention report.
[2] 1934 reprint.   Reference to reprint of articles from "Television made Easy" 1934.
[2] ERRATA   to previous circuit by Ladislav Vig.
[2] Ideas sheets.     Reference from Roy Prescott inc. self-biasing neon driver circuit.
[3] EHT Generator    by Stan Kujawinski.  Description and circuits. NB - see next issue.
[4] Baird exhibit  Isle of Wight.
[4] Test Card  on back of magazine.
[4] Peter Anson Ltd  for all that's best in Hi-Fi  Advertisement.
[5] Reports   by Alan Short on PMT camera,  Stan Kujawinski starting complete new NBTV system,  Doug Pitt making NBTV demonstration exhibit,  Paul Robbins is building studio camera with PMT,  Ladislav Vig has achieved moving pictures from his flying-spot "camera",  Roy Prescott working on lens-disc camera and LDRs,  Dave Sumner working on 'Frame pulse only' synch.,  A. Meijer (inc Dutch address) working on camera-monitor,  Joe Bubez experimenting on FM taped NBTV and comments on phase distortion problems,  A. Quinton on ultrasonic displays used by Scophony in 30's,  Ian Miles has built Ladislav Vig's checkerboard generator with modern ICs.
[6] Video Processor. All transistor design with circuit.
[6] Photo-News   inc Alan Short,  Convention 1979
[7] Beginners Please    Mirror drums by Roy Prescott.  Descriptions and mechanical diagrams.
[7] Video Pre-amp  by Alan Short.  Single JFET.
[8] M.S.T.V.?    Report on Don Millar's efforts with Medium-Scan TV.
[8] Photomultiplier bases   931A (CV337) connections + bias circuit.
[8] Stop Press  -  Dutch NBTV pictures from R. Christoffer of Amsterdam.
[9] NBTV Testcard  on back cover.

Volume 5  Number 2
[2] ARRA '79.  Notice of Amateur Radio Retailers' Association at Leicester.
[2] NBTV Filter  by Roy Prescott.  frequency-response shaper circuit.
[2] Super 48 Line  by Alan Short.  Details on disc making
[2] Dutch NBTV  by PA0RJM, of Amsterdam.  This all valve circuit was designed by R. Christoffer and drives a neon lamp.  The camera is also all valve.
 (drawings by A. Meijer PA0AMX). The lamp used is of the 240v mains type with a built-in series resistor.
The camera circuit Mr. Christoffer lives at Jan Evertsenstraat 36, 1056ù EC, Amsterdam, Holland.
[4] News from Holland
[4] Super 48 Line (continued from page 2.)
[5] Reports.   Doug Pitt on taped syncs.   John Franklin wonders whether a microgroove (LP) record can be used for marking-out discs.  Johnny Brown G3LPB having disappointments, but still trying.  Gil Miles VK2KI on tapes from Alan Short.   Roy Prescott is making photomultiplier camera.  Ladislav Vig mentions a very interesting mechanical colour slide scanner prototype by VALVO to display images on a TV screen.   Alan Short has made a new and very accurate 48 line disc.
[6] Improved Voltage Regulator by Johnny Brown.  Emitter-follower plus compensating diode.
[6] Novel Blocking Oscillator  by Alan Short.
[6] Subs '80  Notice
[7] Letter from America  by Jim Wood  Comments on FM tape recording phase correction and filtering.
[7] Errata  An error in the drawing of the EHT Generator on page 5 of last issue
[8] Suggested Amateur Transmission System  by Dave Sumner  proposes positive modulation, with block diagrams of suggested demodulation processes.
[9] PMT Bases.  Joe Bubez has plenty of cheap 931A bases in stock,
[9] PLLs for TV by D. Pitt  picture synchronised by a tone burst occupying one line per frame.  Descriptions and circuits.
[11] CRO Modulation Driver  by Alan Short.  Single-transistor plus AF transformer grid driver circuit.
[11] Publicity   NBTVA is growing very slowly,
[12] Photo-News   All the photos on the back page of this issue show apparatus built by R. Christoffer and results obtained with it. Two small photos are repeated from Stop Press in the last issue.

Volume 5  Number 3
[2] Subs '80  Your turn to get 'em in.
[2] Reports  Alan Short has completed a new CRO-NBTV adaptor.   Graham Nutt has sucessfully built an 18-line camera.   Doug Pitt has produced "quite good" images from a solar cell camera with 100w illumination.  Chris Long has reported from Tasmania on light-carried communication.  A. Meijer and R. Christoffer had highly successful demos at Veron Rally in Amsterdam on Oct 27th.   R.P. Young has recently loaned his working Baird Televisor to the Isle of Wight Radio Museum.   Joe Bubez has promising results on his FM NBTV tape recording system, but only up to 5.5kHz so far on an 8.5kHz carrier.   Dave Sumner is troubled with hum on his CRO.   Gil Miles has successfully photod several 48 line tape pictures from Alan Short (frequency response corrector circuit shown).
[3] Adapting a C.R.O.  by Alan Short   Descriptions and circuits.
[5] PLLs for T.V.  (continued)  by Doug Pitt.   Circuits using CMOS 4046 and bipolar LM565 PLLs.   Diagrams and descriptions.
[6] VERON Rally   Report by A. (Bob) Meijer on demos and large number of interested people.   
[7] Camera Monitor  by Graham Nutt.  Description and parts layout diagrams.
[8] Drawings for NBTV.  Preferred standards for reader-submitted diagrams.
[8] Newsletter Delivery   Possible publication date/delivery problems.
[8] A.R.R.A. Show 1979   Report on disappointing show from NBTV standpoint.
[8] NBTV Convention 1980  provisionally booked for Saturday 26th April at Trent Polytechnic.
[8] Mass Circulation NBTV article   coming publication.
[8] Big Screen Tricks.  UHF modulator source to put NBTV on TV screen.
[8] Cheap, high quality tape  from L.G.P. Cine.
[9] "Straight" NBTV Receiver  by Bob Meijer.   Valve TRF receiver for NBTV reception.  Circuits.
[10] Useful Balancer  by Doug Pitt.  Mechanical balancer for Nipkow discs, with descriptions and diagrams.
[11] Sync. Mixer   by Dave Sumner.   Sync mixer using two photo-transistors and diode AND gate.   Circuit.
[11] 1934 Reprint ... 60p.   Reprints of article "Television Made Easy" from Television Monthly august to November 1934.
[11] Photo-News   A,B,C  Three different views of camera-monitor by Graham Nutt.
D. Test card with superimposed photo portrait.
E.  Photo from CRT screen by Gil Miles of tapes from Alan Short.
F.  Test card designed by John Franklin.   G. Doug Pitt's balancer (this issue).

Volume 5  Number 4
[2] The Goalpost Method  by Doug Pitt.  Building simple camera mechanical supports with descriptions and diagrams.
[3] Non-linear Notions.  Ideas and diagrams by Dave Sumner and Sam Shulman on using selenium cells or CRT phosphor screens to give light detection.
[3] Beginners Please  by Roy Prescott.  Notes on neon-driving difficulties in the "Beginners Please"  monitor, with descriptions and diagrams.
[5] NBTV Convention, Nottingham  Notice of Convention at Trent Polytechnic on Saturday 26th April, commencing at 12:00am.
[5] Attendance at the 1980 NBTV Convention  Attendance acceptance form.
[6] Beginners Please (continued)
[6] In My Opinion   by Joe Bubez.  Comment on possible increased line numbers, direct v FM tape recording etc.. etc...
{6] Subjects for Conference Agenda  Suggestions invited.
[6] New Photo Reproductions   Changes to grey-scale picture reproduction.
[7} Reports   Gil Miles had disappointing response to his recent museum exhibit, but has one possible convert.   Joe Bubez has ideas on a 200Hz filtered sync system and also believes using series inductors with sensor can increase HF output.  Circuit with inductor and other novel features shown.   R. Christoffer is co-operating with Bob Meijer on various projects and transmitting NBTV on 440MHz.   Bob Meijer  has made arrangements to publish a 100-page "dossier" for beginners.plus several other activities.  Graham Nutt reports (with diagram) on solution to his neon-driving problems.   G.J. Partstra on using a motor-driven film loop for a display, with diagram.   Chris Long (Australia) feels that solid-state photo-sensors are limited by thermal noise and suggests cooling with a Peltier Junction for increased sensitivity. J. Franklin is improving his recording gear and intends to publish his 'Vibracon' soon.   Alan Short is preparing his 48-line system for Convention and encloses sync separator circuit.   Ladislav Vig intends trying computer-aided conversion to TV signals to NBTV.   Doug Pitt has improved response from solar cells and encloses 2 circuits
[7] 1934 reprints of "Television Made Easy" are still available at 60p inc. postage.
[9] New Front Cover   Appeal for new front cover photos.
[9] Convention transport    Transport needs/offers.
[9] The Great Optical Illusion.  Exhibition of television history at the Science Museum.
[9] Hobby Electronics Article   Full-length two-part article on NBTV appears in April and May issues.
[9] Two Watt I.C. Amplifiers   Johnny Brown G3LPB has donated some TAA611 I.C.s (with application diagram).
[10] Recommended Reading   Mostly out-of-print books which may be available through libraries or occasionally second-hand bookshops.
[10] Copy  Appeal for copy, with hints on what is useful.
[10] Back Numbers  Back numbers still available at the time this was printed
[10] Photo-News   A. Ruud Christoffer PA0RJM in den in Amsterdam.
B. Working replica of Baird televisor built by R. Christoffer.
C. Alan Short self-portrait on CRO.
D. Caption AUDIO VISIE from Nipkow disc by R Christoffer.
E. Details of R.C.'s disc camera.

Volume 6  Number 1  1980
[2] Reports   Joe Bubez has abandoned his attempts at FM NBTV tape recording and exchanged information with Doug Pitt on half line-frequency synchronising.   M.H. Allen of York is looking forward to achieving results similar to when he built in the BBC 30-line days.   Ladislav Vig has been experimenting with Philips RPY86 pyro-electric transducers and thinks they may offer IR NBTV possibilities.   Roy Prescott is preparing a new instalment of his 'Beginners Please' series.   Graham Nutt has spare vidicon tube and would like some help on exact dimensions for his replica Baird televisor.   Bob Meijer is still busy completing his monumental NBTV Handbook.   Jeremy Jago on synchronous motors and a claim that Philo Farnsworth had proposed a method in 1931 of transmitting a 400-line picture in 10kHz bandwidth (next development - supersonic flying pigs!!!)   Gil Miles has built a second replica of his original 1929 slide-scanner.   Doug Pitt's monitor, which worked well at the Convention, went down within 48 hours!   Deryck Aldridge is exploring the use of Xenon discharge lamps (circuit shown).   Ian Burford is a mechanical TV enthusiast, brought in by the 'Hobby Electronics' articles.   Comments by Doug Pitt on Ian's 4-pointed iron armature synchroniser.   Dave Sumner sends diagrams of operation of his valve sync separator.   Chris Long sends 2 circuits for driving neons.   Stan Kujawinski sends circuit of bipolar neon/CRT grid driver circuit.   Alan Short sends diagrams of electronics for his precision 48-line disc camera.
[6] Errata  In last issue upper diagram in right-hand column of page 4 is no. 4.
[7] Newsletter ... New Members   The recent article in Hobby Electronics has brought in a large number of new membership applications.
[7] Convention Report.   Slow start, with a few working monitors, Belgian visitors and discussion of tape recording and radio transmission, election of officers etc.
[7] Tele-Show  Report on exhibition of television history at Science Museum.
[8] Front Cover  shows 48-line test card with superimposed portrait by Alan Short.
[8] Back Numbers  now exhausted for present.
[8] Electronics Clubs.  If you know of a local one, would they be interested in NBTV literature?
[8] Missing Pulse Circuit  by Doug Pitt.  Camera-to-CRO adapter circuit shown with description of results.
[9] Photomultipler Offer  Chiltmead of Reading are currently offering photomultipliers at reasonable prices.
[9] Printing  Appeal for access to large-letter printer or typewriter. for Newsletter.
[10] NBTVA Financial Statement for 1969-80
[10] Club Services  Small components and cassette motor.
[10] Disc from L.P.  Roy Prescott is prepared to drill unwarped L.P. discs for members.
[10] Gil Miles is prepared to photo from CRT display any tape sent to him with suitable video.
[10] Help!  Charles Kirk of Bute needs an old line-output transformer.
[11] New Look  conversion to newer symbols decided at Convention.  New symbols shown on page.
[11] Agony Column  Suggestion for queries column.
[11] Photo-News  A. Ian Burford's disc monitor back view.
B. Jan Van Gils poses with Stan Kujawinski's giant camera-monitor.
C. Visitor Bill Plant, with Jeremy Jago, Bob Meijer, Valerie Jones of Radio Nottingham.
D. Dave Sumner's new camera-monitor showing rear CRT screen.
E. Lens disc, mirror-drum, disc, exhibited by Dave Sumner.
F. rear view of Graham Nutt's viewer.

Volume 6  Number 2
[2] Reports   Jonathon Bardell G8HRR  currently collaborating with Robert G8GCQ in simple transmission experiments,  John Aarsse VK4QA  has returned to Queensland and intends to join experiments by Gil Miles and Chris Long and T Anderson.  Chris Long too busy for last 4 years for NBTV, now collaborating with Tony Sanderson VK3AML.   Jim Wood (California) is to build a camera etc for next National Association of Broadcasters convention.  Alan Short finds ordinary "integrating" circuit shown can work for NBTV missing fram syncs.  Gil Miles VK2KI reports on Australian activity with comments and circuits for missing-pulse detectors.  Les Smith is building a camera-monitor with six solar cells to start with.   Like Roy Prescott, he uses neons and mirrors, with water-filled pill bottle as lens - see drawings.   Paul Robbins is making a raster generator to feed his oscilloscope.   A.J. Quinton is using the first stage of a PMT as a simple photo-cell feeding a pre-amp - reports it worked well in this mode.   Charles Kirk looking for a TV LOPT.   Bob Airey reports on how he re-filled a Baird neon lamp.   Jeremy Jago suggests using a small bottle (possibly "tuned" by part-filling) to generate a 400Hz test note when blown across neck.   Bob Miejer and Ruud Christoffer PA0RJ report on intended V.E.R.O.N. demonstartion.   Joe Bubez is working on a blacker-than-black sync system.   Johnny Brown G3LPB still struggling toward successful NBTV.  J.J. encloses Cogwheel template.
[7] Hybrid Camera-monitor (part 1)  by David S.Sumner G3PVH.  All-valve design with circuits and mechanical layout.
[10] ERRATA for previous issue.
[10] Solar cell supplies, new edition of NBTV leaflet, Dutch NBTV Handbook (in Dutch), Mr A. O. Hopkins on "cats eye" scan - see photo-news and next newsletter, invitation to join members' correspondent's list.
[11] Photo-news   1 Chris Long 40-line self-portrait
   2   Convention photo of Roy Prescott with Dave Sumner's new camera, Neil Christall, Lee Prescott.
   3   Two oscillograms from Les Miles.
   4   30-line 7x3 1937 picture of C. G. J. Sanders.
   5   Ladislav Vig comments on microprocessors for NBTV.
[11] NBTV Subs 1981
[11] BATC Convention 1980.  report on NBTV exhibits.

Volume 6  Number 3
[2-4] Hybrid Camera-monitor  by David S, Sumner G3PVH (part 2)   Spot-wobble circuit plus mechanical details.
[3] A1 Factors   Advertisement.
[5-7] TV Without 'Lines'   by A. O. Hopkins with comment from Doug Pitt.  Thought-provoking article on scanning lines, shape of scanning spot etc.
[7-10] Reports.   Alan Short has concluded "flywheel" sync experiments and can now reliably demonstrate 32, 48 and 64-lines from tape recordings.
Deryck Aldridge sends news of useful NBTV parts from Grimsby Electronic Components and also detailed circuits for video head amp and video processor.   Jeremy Jago has built a new Nipkow disc from old litho plate and found it a great improvement, using a 922E neon tube with strapped electrodes and "water jar" lens (?!) for bright light on few mA.  Still experimenting with cogwheel sync.    Ladislav Vig experimenting with 100-element fluorescent linear display using a rotating transparent block.   Jonathon Bardell has modified a Pye waveform monitor to display NBTV.   Paul Robbins  has discovered the old "Applications of Infra-Red Detectors" (Mullard 1971).  It details a 30-hole IR-imaging camera and can suit NBTV with sensor change.   Chris Long  now moved to Sydney and hopes to work with Gil Miles on NBTV.   Charles Kirk  says thank you for LOPTs.   Jim Wood is making good progress with his NBTV demo gear.   Graham Nutt has now moved house and almost completed a new camera-monitor.   Joe Bubez has moved house and worked on a DC clamp and sync generator.   Ruud Christoffer  is using syncs with white sense for all his neon displays, because deep-black pulses cause picture smudging.   A. J. Quinton has a few 6097 PMTs spare, with application circuit shown.   Gil Miles has sent circuit of solid-state solar-cell pre-amp and missing-pulse detector.
[7] 1 Watt IC Amp Use of ULM 2283B in place of LM380, with circuit.
[10] NBTV Convention 1981  Notice
[10] Subscriptions  due 1st January.
[11] Our Front Cover  Chris Long's improved flying-spot equipment
[11] New Area Reps  Jonathon Bardell G8HHR and Robert Cooper G8GQC.
[11] The V.E.R.O.N. Rally    Report on rally held November 8th in Amsterdam.
[11] Dutch Literature   The Dutch NBTV Group have published a Dutch-language 27-page series of ATV reprints of 1935-7 articles titled  "Televisie In De Shack"
[11] Photo-News   A.  Gil Miles' NBTV CRT monitor, showing portrait.
B.  Self-portrait of A.O.Hopkins (article in this issue), using 'cat's eye' technique and 30 horizontal lines.
C.  Self-portrait of Ruud Christoffer.
D.  Bob Meijer and Ruud Christoffer in action at V.E.R.O.N. Rally last November.
E.  Baird Televisor replica by Ruud Christoffer demonstrated at the rally.

Volume 6  Number 4
[2] Obituary for Gil Miles VK2KI
[2] Chris Long has volunteered to act as Australian correspondent for NBTVA.
[2] List of club officials and area reps, plus addresses.
[3] 7th Annual NBTV Convention, Nottingham   Sat 2nd May 1981.  Notice, with 'How to get there' instructions, details of refreshment facilities.
[3] Photos   appeal
[4] Camera to C.R.O. Circuit  by R. Christoffer.  Uses 4x 741 (could use LM324?), 4024 and 2x 555 ics to give V and H scans, composite video and sync.
[4] Wrappers v Envelopes  Was it good for you?
[4] Special Ballast Tube sought  by Bob Meijer, coded 24B875
[4] Small neon bulbs  sent in by Mr G. M. Triplett.
[5-6] 3 Spiral Makers  apparently by Doug Pit, or perhaps A. N. Other.  Very detailed 'how to' article with diagram.
[6-7] Position Scriber  by Doug Pitt.  Comprehensive article with diagrams.
[7-8] Drilling Jig  by D. W. Aldridge  Detailed descriptions with diagram.
[8-9] Diamond Puncher  by A. O. Hopkins.  Detailed article with diagram of means of punching diamond holes for 'hi-res' 'cat's eye' scanner.
[9] Big Screen Scanner  by Alan Short.  Used with old FSTV chassis for NBTV display, with description and diagram.
[9] Field Scan Standard.   Standard is Baird one - right to left to lessen apparent flicker when reading left to right, but some want it reversed to allow for simpler oscilloscope adaptors.  Apparently Baird standard still stands.
[10] Beam Modulation Via Opto-coupler  by Ladislav Vig. Description and diagrams on modulating a CRT via an opto-coupler, giving excellent LF reponse and no HV capacitors.  N.B. 'surplus' CRTs are notorious for weak heater-cathode insulation - ensure there is no more than 10v between them or risk losing your tube!
[10] Transport to the Convention   Offers/requests of transport.
[10] Motor Speed Control  by H. Chadd.  Uses TCA600/610/900/910 ic.
[11] Correspondents   List of names and addresses of members wishing to correspond.
[11] Leisure-time Technology - Utrech, Holland.  78,000 visitors and all copies of their NBTV handbook were sold.
[11] Photo-News   A. John Jones' super-hefty NBTV gear.
B.  Recently-built camera by Ruud Christoffer of Amsterdam.
C.  Ruud Christofferson PA0RJM in his shack.
D.  Disc + PMT camera built by Chris Long (Melbourne) in 1973.
E.  John Jones' first transmitted image of a test pattern.

Volume 7  Number 1    1981
[2-4]  Beginners Please  by Roy Prescott.   Building the mechanical basics of a camera-monitor, with diagrams.
[4-5] Convention 1981  Full report on last NBTV Convention.
[5] Obituary for Mr A. O. Hopkins, long-time television enthusiast and frequent contributor to 'Practical Television' in the 50s and 60s.
[5-8] Disc Camera with Solar Cell Photosensor  by Deryck W. Aldridge.  Comprehensive article with optical and circuit diagrams.
[8] "Screw Bushes" (Meccano) as used in V6/4 by A. O. Hopkins.  A small stock is held by Doug Pitt.
[8] Clear Plastic Beads  may soon be available from Jim Wood in California.
[8] Cathode Ray Tube Sought  Request for DG7-32 CRT.
[8] I.C. Socket strips available from A.1. Factors.
[9-10] Modifying the Pye Waveform Monitor (or any other oscilloscope) by Jonothan Bardell G8HHR.  Description of simple sync-triggered raster generator for CRO.
[10] Convention 1982 Suggestions.
[11] Reports in Brief.  Jonathon Bardell is currently working on his Mk2 camera with PMT.   Joe Bubez apologises for delay in production od his op-amp DC clamp system.   Doug Pitt is working on problem of syncs from tape.   John Franklin has re-invented the "Wokpin" disc and is working on a mechanical line-conversion system.   Stan Kujawinski has greatly improved his mirror-drum camera.   Graham Nutt has almost finished his Baird Televisor replica and also a cog-wheel sync device.  He notes neon 'flicker lamps' only MOVE i.e. the brightness is constant.
[11] Volume Seven.  There is a new production team from this issue onward with Roy Prescott on typescript and Jeremy Jago on dispatch.
[11] News from Holland.   From May 1981 the Dutch section of NBTVA becomes part of VERON, the Dutch amateur radio organisation.  Other details on officers etc.
[11] Photo-News   Top left.  Visitors to the Utrecht "Leisure Technology" show in March.
Top Right    Deryck Aldridge with his very successful disc plus older solar-cell camera.
Middle Left.   Deryck Aldridge's home-made oscilloscope with just-visible visitor portrait.
Middle Right.   Behind-the-counter view of the Utrecht show crowd and Ruud Christoffer's equipment.
Bottom Left.   Rear view of Jim Wood's (California) partly completed receiver.
Bottom Right.  Deryck Aldridge's drum-type camera-monitor.
[11] Correspondents  Deryck Aldridge offers tape correspondence.
[12] Dutch Member's Page  in Dutch.

Volume 7  Number 2
[2] B.A.T.C. Exhibition at the Post House, Leicester October 4th.  Travel instructions.
[2] Details of production team. officers and area reps.
[3-4] My Early Experiments  by A. O. Hopkins.  Posthumous article mainly on his diamond-shaped scanning holes for the 'cat's eye' display and explanations of defects in 405-line system which caused visible lines.
[4] Sync Pulse Improvement Circuit  by J. A. A. Short.  Clean sync and blanking pulse generator, with circuit.
[5] Mounting Solar Cells  by D. B. Pitt.  Informative article on connecting and mounting fragile solar cells.
[5] NBTV Standard Lamp  by D. W. Aldridge.  Super-cheaply-made floodlamp for NBTV.
[6-7] Disc Camera (part 2...conclusion)  by Deryck Aldridge.  Descriptions of video processing circuits and some mechanical/electronic construction.
[7] Editor's Note   The above article has been translated into Dutch and will be available at the VERON Rally in October.
[7] New-Look Newsletter.  Changed front cover and one extra page from last issue.
[8-9] Monitor Circuit  by Jim Wood.  Complex but very elegant circuit to drive a neon lamp with possibly only published HF-energised neon (with useful neon info included) in an NBTV newsletter.   The circuit processes syncs and restores black level, but needs video input opposite polarity to standard +white  Very neat circuit and detailed description..
[9] The VERON Rally.  Notice of rally on 31st October in Amsterdam.
[10-11] The 'Vibracon' - a compact scanner for NBTV using fibre optics  by John Franklin.  Details of a novel scanner idea using a single optical fibre to scan like a vidicon.  This was not actually built at time of publication and is presented as a "what if" idea.  Not known if there was a follow-up article.
[11] ERRATUM for Vol 5/2, page 10.  
[11] Reprint of Ideas Sheets  should be on sale at VERON Show this Autumn.
[12] Reports.  Stan Kujawinski has completed most of an all-electronic NBTV display, broadly based on Joe Bubez's 'CRT Monitor' V 4/2 p2.   John Jones has considerably progressed his mechanical monitor and now has detailed pictures.   Des Kostryca G8WET reports progress with a disc plus 931A PMT camera.   Les Smith reports lack of success with a matrix of solar cells, changed to a single cell, but needed better light concentration (lens details given).   Jim Wood from California hopes to attend the 1982 NBTV Convention.
[12] Photo-News  Top.  View from rear of Deryck Aldridge's camera disc (see this and previous issue).
Middle.   View of Ruud Chrisoffer's monitor with synchronous motor drive.
Bottom.   Chris Long's first monitor (not a new item). 

Volume 7  Number 3
[2] Reports    by Stan Kujawinski (mirror-drum camera),   Les Smith (glass-beads in disc),  John Aarsse (VK4QA),     Jeremy Jago  (comments on sound generator),  Graham Nutt (Baird televisor replica).
[3] Central Control Unit   by Stan Kujawinski.  inc. block + circuit diagrams etc.
[7] VERON Show   report.
[7] Solar Cell Wafers   comments.
[7] Monitor  Circuit"   reference to article by Jim Wood in previous issue.
[7] ARRA Show   major move of retailers to Donnington.
[9] Coming Articles    articles to be published.
[9] RADAM   Dave Sumner G3PVH and Philip Hopes G8MFG in 2 metre transmission experiments.
[10] BATC Convention   description.
[10] Photo-Nipkow Discs   i.e. discs made from photo material.
[11] Dutch NBTV notices (in Dutch).
[11] Tape Magazine    an idea for a NBTV tape magazine which apparently didn't take off.
[12] Photo-News   Hybrid valve-transistor monitor shown at VERON show
Bead spiral camera-monitor by Les  Smith
Graham Nutt's replica Baird televisor,  etc.

Volume 7 number 4
[2] Beginners Please   Roy Prescott.   Monitor construction.
[3] Triangles    An idea by John Franklin on triangular disc holes.
[5] Bike Dynamo NBTV Motor  By Henk  Boerma  PA0WP.
[6] Test Pattern Generator     Simple circuit by Jeremy Jago  generates bars with syncs.
[7] Solar Cell Closed Circuit Camera  by Doug Pitt  inc. circuits, description.
[8] 8th Annual NBTV Convention    Notice.
[12] ERRATA - Errors in Reprint of Ideas Sheets
[12] Stereoscopic NBTV  Thoughts by Ladislav Vig.
[12] Photo-News   BATC show,  ancient BBC record
J.J.'s NBTV pattern generator display from this issue.

Volume 8 Number 1  1982
[3] Reports from Jonathan Bardell,  Don McLean,  Jeremy Jago,  John Jones,  Joe Bubez,  Jim Wood,  Sam Palmer,  Les Smith.
[4] High Quality Mechanical TV Circuit  by Chris Long.   "All Valve" design.  incorporates aperture distortion  correction filter - very useful.
[6] The Bead Disc   by Doug Pitt.  Construction of plastic bead discs.
[8] Another Dynamotor Design   by Mark Schouten,  PA0MJS.  Mechanical description and other details.
[9] Novel Mirror Drum Design   by Les Smith.   With some details.
[9] Convention '82.   Report.  
[10] Video Processor   by Deryck Aldridge.   Inserts syncs and needs -ve video input.
[11] 1000 Volt EHT generator   by Ruud Christoffer.   Circuit and construction details.
[11] Mark Twelve Camera.   Some details of Alan Short's  latest camera.
[12] Photo-News.  All Photos by Jeremy Jago, taken at 1982 convention.
J.J.'s NBTV disc pattern generator.
Les Smith's mirror drum
Roy Prescott's lens-disc device.
Stan Kujawinski's Central Control Unit (described in last issue)
Stan's mirror drum camera.

Volume 8 Number 2
[2] Beginners Please   by Roy Prescott.   Sync generator for disk monitor etc + problems.
[6] Dutch NBTV Reports   in Dutch.
[7] Drum Scanner Portable Camera  By Deryck Aldridge  - mechanical and optics details.
[10] Cog-Wheel Sync for NBTV   by Graham Nutt. - descriptions, diagrams etc.
[12] German Link   Exchange-of-articles agreement.
[12] ERRATA   inc dynamotor wrong name, Deryck Aldridge's previous circuit has wrongly-marked resistor.
[12] Photo-News   Photo-multiplier camera  by Jonathan Bardell
MKII Drum camera  by Deryck Aldridge.
48-line camera-monitor by John Jones
Ancient 78rpm record from Don McLean and also his 32-line COLOUR images!

Volume 8 Number 3
[3] Diode Clamp   by Jeremy Jago - use in DC restorers and sync separators.
[6] Nipkow Disc circuits by Jonathan Bardell.  Some practical circuitry for PMT camera.
[7] BillandBenVision   by Les Smith.  Idea on using plant pot rim with holes for scanning disc.
[8] The Bead Disc    cont. from V8, No.1 - Descriptions + diagrams.
[9] RADAM   Comments on difficulties in transmitting NBTV via amateur radio + D.P.'s comments.
[10] L.E.D. (LED) Array Idea   inc diagrams.
[10] Split Deck   by Doug Pitt.
[11] Dutch NBTV Notices
[12] Obituary  of John Jones of Brislington.
[12] Photo-News.   German PMT camera
Les Smith's mirror-drum setting apparatus.
Half-size "Televisor" by Mart Schoeten. 
Display of Jeremy Jago's signal from generator in Vol 8/1.
Deryck Aldridge's MKIII aperture-drum camera.

Volume 8 Number 4
[3-6] A Home-Made Synchronous Motor for NBTV  by Les Smith  (750 or 1000 rpm).    Many diagrams and descriptions.
[6] Newsletter Graphics  L. J. Devaney has volunteered to take over graphic work for the newsletter in place of Paul Robbins, who has contributed much over the years.
[7-8] 9th Annual NBTV Convention, Nottingham Sat 14th May 1983.  How-to-get-there instructions plus map, Info on refreshments, offers/requests for shared transport, conference agenda and display facilities.
[8] Reports  L.J. Devaney wonders whether other members have had difficulties with shallow focus depth on very wide-apertured lenses.   Jeremy Fowler intends to write in regularly.   Alan Short has produced good 64-line pictures and sent in a very good 7.5 ips tape of video and had good results with an OCP71.      Don McLean G6AWI has produced a computer-generated very-high quality test tape for NBTV testing.   Jim Wood has acquired a worm-driven 96 teeth gear wheel and adapted it to an accurate angle divider and recently sent (from USA) some double-silvered mylar sheet.   Graham Nutt is designing a new camera based on a PMT and 8-pole bike dynamo.   Deryck Aldridge has almost finished his Mk5 drum camera.
[9] Dynamotors for NBTV  (bike dynamos).  Info on difficulties with some types in locking and also on some better ones.
[9] Radam  Appeal for licenced radio amateurs capable of transmitting NBTV.
[9] Dutch "Convention".  Report on convention due to be held at Heideheuvel Holiday Centre.  Full report in next newsletter.
[9] Baird Museum.  Radio Rentals' Baird museum is now open at company headquarters.
[10] NBTV and the Radio Amateur  by Dave Sumner G3PVH.   Comments on requirements for successful NBTV transmission and reception, plus comments on effectiveness of interlacing.
[10] Useful NBTV Circuit  by Doug Pitt.   3-transistor signal switch or sync inserter.
[11] The Framed Disc (A Third Constructional Method)  by Doug Pitt.  desciption and diagrams to make a Nipkow disc completely enclosed within a supporting/protective frame.
[11-12] An NBTV Studio:1  by Jeremy Fowler.  Discussion on neccessary equipment and layouts, with diagrams.
[12] Blocking Oscillator EHT Generator  - mostly Alan Short's version, with description and diagrams.
[12] Photo-News  Improved 'screening' and contrast-corrected to improve grey-scale.
Top Left.  Jim Wood's angle divider made from worm-driven ex-WW2 variable capacitor.
Top Right.  Divider in use for marking.
Centre Left.  Alan Short's 64-line picture from CRO screen.
Centre Right   Similar picture using OCP71  photo-transistor with increased lighting.  Note negligible "noise".
Bottom Left.   Repeat of last issues Mart Schouten's "dynamotor" display.
Bottom Right   Repeat of Les Smith's Bead disc display (V7/3).

Volume 9 Number 1  1983
[3] NBTV on the Air   by Jonathan Bardell G8HRR.    Problems with NBTV radio transmissions.
[4] NBTV on Tape   by Jeremy Jago.    NBTV tape recording, both direct and via carrier wave.
[6] Beginners Please - Camera/Monitor    by Jim Prescott.   Includes component considerations and some  mechanical details.
[7] How Useful is NBTV??   by Bob Meijer.    Memories of experimental Dutch TV and NBTV.
[11] Mechanical Television is Dead!   by Doug Pitt.    Mechanically-scanned TV inc high-res with mirror polygons.
[12] Club Finances.    Not quite multi-national standard.
[12] Photonews.  Australian  pictures with 100kHz spot-wobble.
JJ's 10kHz carrier recordings.
Images recovered from 78rpm Mastervision record by Don McLean.
1936 photo for Bob Meijer's article.
Deryck Aldridge demos panning ability of mirror-drum.

Volume 9 Number 2
[2] Linear Timebase   by Joe Bubez.   Very linear sync-driven bootstrap timebase using discrete semis including a  FET.
[4] CRO Modulator   by Keith Vickers.   Uses video-modulated small RF oscillator to modulate grid of CRTs which  have no provision for DC/LF connection.
  N.B.  A Q-reducing resistor should help increase video bandwidth and use a 100-150v tuning capacitor.
[4] ERRATA  includes corrections for Vol 6/1 p8, Vol 7/4,  p9, Vol 8/1, p 8.
[5] Digital Doings   refers to Don McLean's  Oct 83 "Wireless World" article on image enhancing techniques.
[5] LED Driver   by Deryck Aldridge.   Simple NBTV display driver  with VMOS FET.
[7] Accurate Drum Puncher   by Deryck Aldridge.   Description including some mechanical details.
[9] Unusual Scanners  -  Strictly experimental!
[10] Northern Transmissions.   Report on very successful NBTV 70cm transmissions.
[11] 29 MHz NBTV Transmitter   by Dave Sumner  G3PVH.   Simple valve design.
[12] Photonews.   Don McLean's recovered ancient images.  
Jeremy Jago's disc camera at 1993 convention.
Deryck Aldridge's compact camera and CRO.
Les Smith's solar cell camera-monitor using combined Nipkow and bead disc.

Volume 9 Number 3
[3] Making a Solar Cell Camera   by Jeremy Jago.   Part mechanical and electronic details for an NBTV disc camera.
[5] Enhanced NBTV.    refers to Don McLean's  article in February "Radio and Electronics World"
[5] Black Bar Sync System.  Reference to Baird sync system and expected article by Alan Short in next issue.
[6] Report by Jim Wood.   Has some useful optics details.
[7] Variable Scanning System   by Nick Hammond.   Some mechanical details of proposed multi-standard camera- monitor.
[9] A Mechanical Oscilloscope (eh?!)   by Bob Cooke  G3DOX.   Some details of opto-mechanical waveform viewer.
[10] Ten Metre Receiver.   Direct conversion receiver, but has problem with locking onto carrier -  hardly TV-friendly.
[11] CRO to Monitor Converter   by Alan Short.   Converter to allow standard CRO to be used as NBTV display.  SEE ERRATA on p6, next issue.
[12] Photo-News.   Lester Devaney and Doug Pitt at the 1993 Convention.
Les Smith's current camera-monitor, photographed by himself in his Kentish den.
Jeremy Jago at the 1993 BATC Show.
Jim Wood constructing a disc by the optical reduction technique in 1982.
 Attempt by Doug Pitt to expose a film so as to show both a CRO and the picture on its screen.
 Photo of Les Smith at the 1983 Convention.

Volume 9 Number 4
[3] Dutch Meeting.   Report in English.
[4] A Tale of Two Solar Cells   by Joe Bubez.  Useful practical info and circuitry for using different types.
[6] ERRATA   Corrections to Alan Short's CRO-to-display adapter from last issue.
[9] Sync from Optical blanking   by J.A. A. Short.   Circuit and info.
[10] Photographing NBTV   by Jeremy Jago.   Practical info on photographing NBTV displays.
[11] Lenses for NBTV Cameras   by John Franklin.   Practical info with diagrams on lenses for NBTV.
[12] Photo-News.   Chris Long with mechanical receiver and calliper-type sync gear (designed
by Graham Nutt)
Chris Long's new camera.
Screen photo of Alan Short on his 96-line disc camera!

Volume 10 Number 1  1984
[3] Larger pictures with a Disc or Drum   by Les Smith.   Ideas for larger-than-normal displays, with diagrams.
[4] Stepping Motors.   The club's 2-coils stepper motor and ideas on how to use it.
[6] More Syncs from Blanking   by J. A. A. Short.   Improved versions of article in last issue.
[6] Books Recieved    A number of references to Baird information and publications.
[7] Filing Newsletters   by John Franklin.   Idea for storage of NBTV mags.
[8] The Nipkow Disc revisited   by Joe Bubez.   Article on disc, lenses and illumination for display.
[10] Getting Started on NBTV   by Doug Pitt.   How-to-make-it suggestions for drum and disc plus useful formulae  for construction.
[11] Slotted Opto Switches    Data on these switches, otherwise known as optical forks.
[12] Photo News.   Mostly convention pictures.
Deryck Aldridge witch solar cell camera with 3-lens turret + PSU.
Les Smith's years-old 60-line mirror screw.
Jeremy Jago with mirror drum. 
Eindhoven Meeting.   Picture from screen of Ruud Christoffer's monitor
Mark Schouten explains Hellschreiber machine at Eindhoven.

Volume10 Number 2
[3] Solar Cells: a Report   by Jeremy jago.    Practical info on resistive cell loading v frequency response and lenses.
[4] The Televiewer, MKII   by Jim Wood.  MKI was shown in Vol 7/2.  Full circuit and description of operation.
[5] Questions and Answers about 30-line TV  supplied by Chris Long. Many interesting practical solutions used in 1932 by D.C. Birkinshaw of Baird/BBC-TV fame.
[7] My Camera-Monitor   by Rodney Seymour  Some circuits and descriptions.
[9] A Non-Scanning TV Camera   by Chris Korycinski.  inc. notes on using dynamic RAM chips as CCD sensors.
[10] Baird or Jenkins?   by Tony Hopwood. Tony delves into the "Who really invented television" controversy.
[12] Photonews.   1984 NBTV Convention pictures.
Deryck Aldridge,  Stan Kujawinski and  Roy Prescott.
Equipment by Jim Wood,  Rodney Seymour,  Deryck Aldridge.
Pictures from Jeremy Jago's camera.

Volume 10 Number 3
[3] Questions and Answers   by D. C. Birkinshaw.   Concluded from last issue.
[4] Disc to Drum Without Distortion   by A. J. Quinton.   Not NBTV, but opto-mechanical info which may be applicable to NBTV.
[7] Using a C.R. Tube with a Nipkow Disc   by Rennie Hall G8PDJ.  Use of a CRT as a viewer diffused light source.
[8] Mechanical Sync.   Notes on Jim Wood's mechanical sync experiments.
[9] Literature Reviewed   inc Bulletin of the British Vintage Wireless Society and "Here's Looking at You" by Bruce  Norman.
[9] NBTV at the FIRATO Show    Dutch exhibition report in English.
[10] Dutch Language News.   Not in English  ;-)
[11] Lens Info by Chris Long with recommendations for ratios of disc/lens/image.
[11] A. A. Campbell Swinton.   Monograph on the life and work of A. A. Campbell's proposals in 1911 on all-electronic TV.
[12] 1938 Super Nipkow Disc   by Kurt Thom (translated from German).   Details of fantastic 10,500 rpm disk giving  441 lines - if you dare stand that close.
[12] Photo news.   A. J. Quinton's swashed Perspex disc and curvature correction apparatus with pictures of corrected display.
Ruud Christhoffer's working Televisor.

Volume 10 Number 4
[3] CRT Monitor Circuits   by Joe Bubez.   Reprint with practical deflection circuits, timebase, CRT connections and sync circuit.
[5] Photocopiers for NBTV  by Chris Korycinski.   How to exploit these goodies.
[6] Pseudo This and That   by Doug Pitt.   Use NPN-PNP pairs to make UJTs, thyristors etc.
[8] Camera Head Amplifier   by Deryck Aldridge.   Bipolar photocell design with correction for wayward cells.  A simpler version is shown in a later issue.
[9] ICI on PARLE NBTV   (or everything you wanted to know about NBTV but couldn't decipher)   
   Abbreviations.
[11] NBTV on the Air ... 1937.   Dutch NBTV experiments.
[12] Baird Televisor Dimensions.   Layout and sizes of Baird kit set.
[12]  Photo-News  Les Smith's mirror drum. 
Plaque to A. A. Campbell Swinton's memorial in Edinburgh, plus unveiling ceremony.
Rennie Hall's tele-slide apparatus  (see article in last issue).

Volume 11 Number 1  1985
[3]  NBTV Convention   Report.
[3]  Dutch Meeting  Report.
[4] Pin-Hole Camera Design   by Alan Short with moving OCP71.
[5] Staircase Divider Circuits   by Doug Pitt.   UJT and pump dividers.
[6] Mirror Drum Camera Circuits    by Stan Kujawinski.   Electronics this article - mechanics appeared previously.
[8] Improved Modulated Carrier Tape System   by Jeremy Jago.   Describes circuits with diodes and transformers.
[10] Dutch Language Announcements
[10] Non-Slip Pulleys    supplier details from Chris Koryinski.
[10] Jim Wood   supplies 6mm beads.
[10] Malcolm Baird.  Expected visit to Britain.
[11] Sync Separator  (Reprint from CQTV)   by Brian Dandy G4YPB.   HDTV circuit also suits NBTV.
[11] BATC Show 1985   Report on NBTV stand.
[12] Granada TV "Television" Series.   Review by Doug Pitt - not very happy with trivialisation of subject.
[12] Baird Company Employees.    Eligible for copy of "Baird Television Newsletter" from Ray Herbert.
[12] Photo-News   A number of 32-line pictures, including some from 10kHz carrier recordings.
Dave Sumner and his modified camera.
Deryck Aldridge's tilt-and-pan camera and monitor unit on 4-wheel dolly.
Deryck's latest drum camera with tilt and pan mechanism in lens turret.

Volume 11 Number 2
[3] My First NBTV camera   by Lee Prescott (aged 15)
[5] NBTV Recording - a Progress Report.   by Jeremy Jago.    Progress in carrier recording and comparisons with direct recording.
[6] Tips on Chips   by Keith Vickers.    Tips on practical use and avoiding abuse.
[7] Picture Sharpener   as used by Bill Elliot.   Edge "crispener" using transistors.
[8] Carrier Method Recording Circuits   by Deryck Aldridge.   Circuits for carrier oscillator,  modulator,  demodulator and carrier removal filter.
[11] Still More Pin Holes   by Alan Short.   Mechanical details.
[11] New Dutch Museum   at Utrecht.
[12] Photo News.    Piet Wakker in Amsterdam.
Mart Schouten and his camera.
Camera-monitor by P.v.d. Star  from Gouda.
Len Firmin's genuine 1930's televisor.
Alan Short's disc pin-hole camera.
Two CRO screen shots by J. Jago showing difference between direct and carrier-borne recordings.

Volume 11 Number 3
[3] More on NBTV Recording   by Roy Prescott.    Carrier-type tape recording with diode modulators.
[6] Pictures in Sync   by Jeremy Jago.   Transistor sync separator/sync-driven ramp generator.
[6] Glowing Report! A WARNING.   Strongly radioactive military surplus components.
[8] Photomultipliers  Practical diagrams for 931A/CV337 and RCA 4555, R450
[10] NBTV Laser Scanner   by Ladislav Vig.
[11] Coming Publications.   New biography of Baird,  New history of television.
[11] Book Review   by Bob Meijer.  Review of German television book - Bob recommends it.
[12] Malcolm Baird (J.L. Baird's son)
[12] Tone Control for NBTV   Frequency correction.
[12] Photo News.   Two receiver replicas by Jurgen Valter (very nice).
Pictures from Peter Smith's disc display.
Two new photomultiplers available (pic. by.J.J.).
Rare mirror-drum receiver by Bush for  back-projection.

Volume 11 Number 4
[3] Camera Modification   by Lee Prescott.  See V11/2 for original.
[4] Missing Pulse Circuit   by Des Kostryca G8WEI.   Ideas on using different line standards with fixed 12.5 f.p.s.  frequency, with logic and sync circuits.
[5] Book Review   by Ray Herbert.  The secret Life of John Logie Baird.
[6] Reports from members, including sketches of Alan Short's unusual  optics.
[8] VMOS video driver for LEDs  by Deryck Aldridge.    Variant on circuit of Vol 9/2.
[10] Mihaly and Traub  by Doug Pitt.  Interesting variant on mirror drum using small rotating central mirror and arc of fixed mirrors.   Very economical in parts and low inertia.
[11] A Portable NBTV "Workshop"   by John Franklin.  Special bench-top for accurate work on discs and drums.
[12] Photo-News. (Text on p7).    Pete Smith's 30-line scanner/monitor.
Malcolm Baird with Doug Pitt and camera by Deryck  Aldridge.
NBTV exhibits arranged by Ruud  Christoffer at Fonografisch museum.
Renovated 1932 disc receiver.     Doug Pitt's mirror-screw alignment device.

Volume 12 Number 1  1986
[3] A Portable NBTV "Workshop" ( 2)   by John Franklin.    Continuation of last issue's article.
[5] A Photomultiplier Camera   by Jeremy Jago.  Details of PMT circuit, EHT generator, sync inserter etc.
[7] Aperture Distortion   by Deryck Aldridge.   Explanation of this effect and also method of alleviating it.
[8] 32-Line Toneburst   by Don McLean.   Using bursts of tone on the audio channel to give reliable frame sync.
[10] Getting Your Bearings with NBTV.   Suggestions on bearings by John Franklin.
[11] Bespoke NBTV recorder.   Jim Wood suggests using a modified deck running at 4x speed to record FM NBTV  on a 20kHz carrier.
[12] Book Review.   Baird by Geoff Hutchinson.   Short but very factual.
[12] Photo-News.   Drum cameras by Deryck Aldridge
Dave Sumner's 10 metre transmitter,  
CRO trace of received  NBTV transmission on 10m
Picture from J.J.'s PMT camera,  
Simulated NBTV signals from HDTV signals, via  ADC and computer.

Volume 12 Number 2
[3] A Compact disc Camera-monitor  by Deryck Aldridge.  Descriptions and mechanical diagrams of very compact  unit.
[7] NBTV Transmitter for 10 Metres   by Dave Sumner.   Complete valve design.
[9] Miniature NBTV Transmitter   by Alan Short.  Very short-range for use with domestic FM receiver.
[10] Book Review.   the Active Filter Cookbook  by Don Lancaster.  Excellent book, but does not cover all available types.
[11] CRT Data Availability.
[12] Historical NBTV Article   Notice of Ray Herbert's article in "Radio and Electronics World" November 1986.
[12] Photo-News.   Deryck Aldridge's mini-disc camera-monitor (this issue).
Part of 60-line Mihaly-Traub receiver, by Les Smith with low-light portrait of J.J. from his PMT 
camera.
Views of John Franklin's "NBTV Workshop" recently described.

Volume 12 Number 3
[3] A Portable NBTV "Workshop" ( 3)   by John Franklin.    Continuation of last issue's article.
[5] Motor Synchroniser Circuit   by Jim Wood.   Uses phase comparator from 4046 CMOS IC to sync DC motor.
[5] Newsletter Index   by Chris Koryinski   now available.
[5] Report on strange Phenomenon in induction Motor   by Les Smith.
[6] Tone Bursts for NBTV?   by Paul Robbins.   Proposals for tone-burst syncs on recordings.
[7] New Cameras   by Alan Short.  Details of rotating polygons and unusual optics.
[8] The Ideal Sync System   by Doug Pitt.   Requirements for reliable sync.
[10] Two Useful Circuits   by Jim Wood.   Sync pulse mixer and solar cell pre-amp.
[11] Photography in NBTV   by Doug Pitt.   Photographic methods of making scanning apertures for discs.
[12] LEDs and Your Eyesight.   WARNING from John Franklin about ultra-bright LEDs, particularly IR types.
[12] Photo-News.   Peter Yanczer's telecine apparatus.
Chris Long's flying-spot apparatus.
12-mirror camera by Alan Short plus picture of display.
CRT screen picture from Deryck Aldridge's drum camera
Deryck Aldridge's compact disc camera-monitor  (see last issue).

Volume 12 Number 4
[3] A Portable NBTV "Workshop" ( 4)   by John Franklin.    Continuation of last issue's article.
[6] Large Display from Small.   Use of cheap HDTV camera to enlarge NBTV picture.
[6] ERRATA, etc.    Corrections for previous issue.
[6] 405 Line Club.    Details from 1987.
[7] Books Received.    The Slow Scan Companion   by C. G. Dixon,  J. Wood and M. Wooding pub B.A.T.C.
  The Mechanics of Television   by Peter Yanczer  (U.S.A.)
[7] New NBTV Converter.   News of  Don McLean's  625-to-32 line converter.
[7] Televisor Model.   Constructional article for quarter-scale model of Baird "Televisor" by Bernard King  in BVWS   (see below)  Newsletter (11/3), probably early 1987.
[8] Report on Nipkow Disc + solar cell monitor fom John Franklin with some details.
[9] Getting started on NBTV   by Doug Pitt.   Drilling hole spirals and also disc mountings.
[11] The British Vintage Wireless Society (BVWS)  membership details etc.
[12] Photo Page.   Ben Clapp, Tony Bridgewater and Doug Pitt at 1986 "TV in the Home" show.
Bush console TV (1934).
Peter Yanczer's self-portrait.
Bernard King's quarter-scale televisor model.

Volume 13 Number 1  1987
[3] Getting Started on NBTV   by Doug Pitt.    A simple trammel for disc construction - continued from last issue.
[4] Report by Chris Long  from  Australia on his flying-spot camera.
[5] Toneburst syncs- their use in a Digital Scan Converter   by Don McLean.    Several points on signal processing,  plus some circuitry.
[6] First Impressions of Scan-Converted LDTV Pictures   by Don McLean.   Improvements by raising LDTV to 625.
[7] A Portable NBTV "Workshop" (5)   by John Franklin. Peter Yanczer.    PMT, FETs, op-amp circuit.   No motor speed control shown.
[10] Gamma Corrector Circuit   by Trevor Lumb (BATC) on request by editor for information on the TL441 i.c.       Circuit shows TL441 application capable of variable gamma.
[9] Camera-Monitor Circuit   by Peter Yanczer
[11] Report on 1987 NBTV Convention
[11] Dutch Show.   Report by Bob Meijer on NBTV show at the NVHR's 10th anniversary celebrations.
[12] 1987 BATC Show.   Report on NBTV stand at show.
[12] Peter Yanczer's Book  "The Mechanics of Television" recently reviewed in newsletter, available from him in  U.S.A.  (address given).
[12] Old Baird Callsign re-issued to Baird Museum Radio Society.
[12] Photo-News.   View of parts for club's NBTV camera-monitor kit.
Peter Yanczer's disc drilling rig.
Horizontal disc viewer shown from rear.
Flying-spot apparatus.  
Pictures from Peter Yanczer's flying-spot.

Volume 13 Number 2
[3] A Portable NBTV "Workshop" ( 6)   by John Franklin.    Continuation of last issue's article.
[4] Area Correspondents   including Australia, Holland and U.S.A.
[5] Beginners Please   by Roy Prescott.   Information on LEDs and sensors.
[7] Report on 1303 Chip   by Jeremy Jago.   Useful data and application circuit for this dual-channel stereo pre-amp.
[7] Air Mail Delivery Surcharge   option available outside U.K.
[7] Up-Converter Gives Colour - note.   Don McLean's 32-625 line converter can now give frame-sequential colour.
[7] Gears and Pulleys.    Notice of very old source of same.
[9] New NBTV Camera.   Notes by Alan Short on his experiments on multiple passes of light through lenses.
[9] Dutch Language Announcement 
[9] Toothed Laminations Offer.   Obsolete?
[10] Getting Started on NBTV   by Doug Pitt.   The aperture drum.
[11] Circuits of CRT Monitor   by Peter Yanczer.   Op-amps, UJTs for two timebases with magnetic deflection + sync processor.
[12] Books Received    "Television, The First 50 Years",  "British Television, The Formative Years".
[12] Photo-News.   "Laurel and Hardy" replacement for last issue's poor print.
Peter Yanczer's 5-inch monitor (this issue),  3 pictures from Peter's monitor.
2 NBTV pictures of cats on J.J.'s PMT camera indoors.

Volume 13 Number 3
[3] A Portable NBTV "Workshop" ( 7)   by John Franklin.    Continuation of last issue's article.
[5] Computer-Simulated NBTV Signals Offer.   Offer from Don McLean.
[6] TV Picture Tubes for NBTV   by Jeremy Jago. inc. EHT unit for magnetic CRTs.
[6] Dutch Meetings at VERON and Vintage Radio Society.
[7] ERRATA   Corrections to Peter Yanczer's monitor circuit and Jeremy Jago's 1303 application circuit.
[7] Beginners Please   by Roy Prescott.   Test on LM1303 i.c.
[7] NBTVA videotape of 1987 Convention.
[8] LED Driver   by Peter Yanczer.   Hefty driver using  TDA2002 chip. 
  WARNING - see ERRATA in next issue.
[8] Optical Fibre Terminal   by Alan Short.   Ensuring proper alignment between fibre and sensor.
[9] Ideas Please   by J. Jago.   Appeal for new ideas, with some suggested subjects.
[9] Getting Started on NBTV   by Doug Pitt.   The aperture drum (continued).
[11] High Impedance Voltmeter   by Deryck Aldridge.   Useful circuit uses 3140 i.c. to make 3-range DC meter with 10 meg Rin and  100mV, 1V and 10V ranges from 1mA meter.
[11] Valve and CRT Information.    Offer by Jeremy Jago.
[12] Dates of 1988 Meetings.  Provisional dates.
[12] D.N. Van Toorenburg     His equipment described.
[12] Photo-News.   Phonic wheel (48 teeth) by Peter Yanczer.
D.N. Van Toorenberg's camera-monitor.
"Miller" 8-pole bike dynamo as sync. motor by Peter Yanczer.
Les Smith's 1933 TV equipment.
Peter Yanczer's 120-line mirror-screw.

Volume 13 Number 4
[3] A Portable NBTV "Workshop" ( 8)   by John Franklin.    Continuation of last issue's article.
[4] Dutch Language Announcement
[4] British Vintage Wireless Society.   Advert.
[5] Annual NBTV Convention.   Announcement for 1988.
[6] Neon Lamp Driver   by Peter Yanczer.    Op-amp + 250v VMOSFET.
[7] Play With Mirrors   by Alan Short.    Mirror polygons + some sketches.
[8] ERRATA  on Peter Yanczer's article on LED driver (Vol 13/3, p8)  READ BEFORE you build it!
[8] Newsletter Material.   Appeal for articles, photos, notes -anything.
[8] Keep Fit with NBTV.   Les Smith reports that Boots halibut liver oil capsules work "quite well" for bead discs!
[9] Simple Synchronous Motors   by Les Smith.   Improvements on previous article.
[10] Getting Started on NBTV   by Doug Pitt.   The aperture drum (continued).
[11] Camera Update   by John Franklin.   Updates on small solar-cell camera-monitor described in Vol 12/4.
[12] Mains Hum Sync Signal.   by J. Jago.   Use of recorded 50Hz to lock a bike dynamo-motor on tape playback.
[12] Photo-News.  Two of Alan Short's many mirror-drum cameras.
Cylindrical oil-filled perspex lens by Peter Yanczer. 
Light guides of different sorts by Doug Pitt.
Picture of late Gil Miles observing sun via TV camera.
48-line picture of Peter Yanczer's (ex) cat.

Volume 14 Number 1  1988
[3] Neon Lamp Driver   by Jim Wood.  12v-operated design takes standard 1v video and generates high-voltage R.F. drive for neon lamp.   Good brightness and linearity.
[5] Simple but Clumsy   by Jeremy Jago.  Some staggering-but-true stories of old-time TV.
[6] Experiments with Colour   by Deryck Aldridge.   multi-everythings.
[7] New Book Source   info on Bampton Books.
[8] 1988 Convention Report.
[8] New Club Sale Offers.   Watts of new stock.
[9] Diode Recovery Tester   by Jeremy Jago.  Assesses storage time of diodes.
[9] Behind the Disc   by Doug Pitt.   Disc sensors and their sizes and how to focus them.
[11] Great Yarmouth QRP Meeting    Notice.
[11] Report by Dave Sumner  and his huge disc display.
[12] Report   by Alan Short  on his Weiller/Atkinson mirror-drum.
[12] J.L. Baird Centenary Events.   Special events to mark Baird centenary.
[12] Museum of Moving Image Opening (at last).
[12] Photo-News.  1930s NBTV neons and modern substitutes.  
2 photos of 625-32 line converter video o/p.
Experimental toothed-wheel synchroniser by J. Jago.
Picture of Barthelemy's portable 180-line camera in this issue p.5.
  
Volume 14 Number 2
[3] A Portable NBTV "Workshop" ( 9)   by John Franklin.    Continuation of last issue's article.
[5] Behind the Disc   by Doug Pitt.   Disc sensors and their sizes and how to focus them.  (conclusion)
[5] NBTV Videotape.   Anyone want a copy?
[5] Photos Wanted.   Have you any photos of anything interesting?
[6] Drum and Solar Cell Camera   by Deryck Aldridge.   Details of optics with a 2" lens.  Also references to complementary articles previously published.
[8] J.L.B. Centenary Events   Report by Malcolm Baird.
[8] New NBTV Test Tape
[9] Book Review  -  "Sermons, Soap and Television"
[9] U.S. Museum Opened.   U.S. version of British M.O.M.I. opened.
[10] Dutch Language Announcement.
[10] British M.O.M.I. Opens  - late, of course.
[11] BBC Programs on Baird.  Review.
[11] Report from Graham Nutt.
[11] Annual Subscriptions.   Gettem in!
[11] ERRATA    Vol 12/2 p 10 on neon valves and Vol 13/4 p8 on Alan Short article.
[12] Report on new club lenses - now probably all gone.
[12] G2TV On The Air Again.   Report + picture of QSL card.
[12] Photo-News.   3 shots of mirror-screw apparatus.
Convention 1988 with Deryck Aldridge.
Dave Sumner and Ron Lucking.
Photo of CRT display of BBC/Baird 30-line display 1935.

Volume 14 number 3
[3] Random Research Report  by Rennie Hall.  Adventures with bike dynamo-driven disc and display, light sources and radio link.
[4] NBTV Tape Recording by FM  by Joe Bubez. Description and circuit of FM modulator.
[6] A Portable NBTV Workshop (10)  by John Franklin.  This issue is about mirror screws.
[7] Peter Herman  has the bright idea of painting  his disc "Viewing tunnel" end with harmless ("rechargeable")   luminous paint to avoid bumping into it in the dark.
[7] Box Hill Plaque Ceremony.  Plaque for J.L.Baird.
[8] A Quick Mirror Drum  by Alan Short, with constructional details.
[9] BATC Show 1989  notice.
[9] Book Offer.  Margaret Baird's "Television Baird" is being remaindered.  
[10] Mechanical Sync TV   by Doug Pitt.  Synchronising two discs via a pair of wires.
[11] NBTV Convention 1989  provisionally set for Sat 22nd April at Loughborough.
[11] Photo News Alan Short's mirror drum using two spirally-cut wooden discs.
One of his latest polygon cameras.
Disc camera by Bjarne Kristensen of Copenhagen.  Peter Yanczer's 48-lens disc.
Group photo of Nottingham local meeting.  Left to right Doug Pitt, Stan Kujawinski, John Fletcher, Don Tomkins, Jem Jago.  Cartoon of Bob Meijer.
[12] Getting Started on NBTV  by Doug Pitt.  Marking-out a Nipkow disc (continued).

Volume 14 number 4
[3] Annual NBTV Convention   Saturday 22 April 1989 at Loughborough University.
[3] CRT Bases   by John Franklin.  D.I.Y.  replacements for these hard-to-get items, with diagrams.
[5] Getting Started on NBTV (concluded)  by Doug Pitt.
[6] Waveform Corrector for Recording (and Transmitting) NBTV   by Dave Sumner G3PVH.   Variable equaliser to correct amplitude and phase shifts in played-back/received signals.
[8] NBTV Recording by FM (2)  by Joe Bubez.   Tape-FM demodulator and video amplifier, with description and  circuit.
[10] Tube The Obscure * by Jem Jago.  Identifying unknown CRTs and their connections.
    * Hardy the title I would have chosen (Ed).
[11] Book Review  by Doug Pitt  "History of Television" by A. Abramson.
[11] British Vintage Wireless Society  Advert.
[11] Club AC to DC Converter.  Gives 6v regulated output, with circuit diagram.
[12] The G-QRP Club  Advertisement.
[12] NBTV Vidicon Camera.  Jeremy Jago has completed a 32-line vidicon camera, to be shown at the Convention.
[12] BATC Show 1989   Announcement.
[12] Photo-News.   Ruud Christoffer at a Dutch meeting a few years ago.
Doug Pitt in workshop, September 1981
Gil Miles VK2KI.
Wooden "sculptures" which reminded a member of mirror screws.
Mirror screw aligning device.  See also Vol 11/4.

Volume 15 Number 1  1989
[13] A Portable NBTV Workshop (11)   by John Franklin.  Polishing mirrors.
[4] Two Metre Transmitter.   A simple crystal-controlled circuit from "Sprat"
[5]  . . . And So To Baird   by Keith Wilson.  Reminiscences on how he got the NBTV bug, including a valve cassette recorder to neon interface.
[6] Another Mirror-drum Construction   by Alan Short.  How-to-do-it article with sketches.
[8] NBTV Non-flicker Scheme  by Les Smith.  Use of dual 32-line disc to double flicker frequency.   With diagrams.
[9] Micrometer Idea  by Bill Fox of Falmouth.  Using a micrometer to mark out the spiral of small holes in a disc.
[10] A 32-Line Television Camera  by Jeremy Jago.  Description (but no circuits) of vidicon camera.
[11] Obituary for C G J Sanders, first Dutch NBTVA member.
[11] 1989 NBTV Convention   Report.
[11] Norfolk QRP Meeting   Announcement of annual QRP meeting at Yarmouth.
[11] Obituary  for C.G.J. Sanders.  First Dutch member of the NBTVA.
[12] Photo-News.  Les Smith, Nick Mann and Norman Reynolds examine a bead disc at the 1989 Convention.
Rennie Hall using his 625-line camera and monitor to magnify his 32-line picture.
Ripley Pedro examines a miniature camera-monitor built by Deryck Aldridge and brought by Les Smith.
Peter Herman and his solar cell/neon camera/monitor.
"Chubb" fire extinguisher, pictured using Jeremy Jago's 32-line vidicon camera.
Les Smith shows the parts of a novel 16mm TV recording apparatus, photographing both interlaced fields without recourse to a fast pull-down mechanism. 
Ben Clapp as he appeared in 1928 with John Baird.
[12] Dutch-Language Announcement
[12] G2TV and G2LO join Forces  to celebrate 60th anniversary of start of 30-line BBC TV transmissions.

Volume 15 Number 2
[3] Twenties Catalogue replica.  The British vintage Wireless Society has sent its members a free replica of the Brown Bros. 1925/26 Radio components catalogue.
[3] NBTV Frequency Modulator . . . Comments   by Joe Bubez.   Update to article of Vol 14/3.
[4] Modulated Line of Light   by Peter Yanczer.  Long, narrow light source with diagrams.
[5] The National Wireless Museum   by Jeremy Jago.  Report on this remarkable collection.
[5] A Synchronous Motor   by Jeremy Jago.   Thyristor-controlled circuit forces DC motor into mains synchronism. See next issue.
[7] Camera head Amplifier   by Deryck Aldridge.   Simplified version of earlier design.
[8] The Birth of Dutch Television   translated and abridged by Bob Mejier and Doug Pitt.    The story of Fred  Kerkhof PA3BER, whos pioneering work introduced television to the Dutch public.
[9] Anything But the Kitchen Sync   by Doug Pitt.   That syncing feeling - and many variations.
[11] Simple 2 Metre transmitter . . .comments.   Anomalies in the circuit.
[11] G2TV On The Air.   Ray Herbert G2KU reports G2TV's day on the air.
[12] Club Low-Pass Filter Idea.   Appeal for design for a variable 5-10kHz, sharp cut-off LPF for testing resolution of members' cameras etc.  (see Vol 16/1)
[12] Photo-News.  Peter Yanczer's image dissector tube and also his modulated line of light.
Incomplete disc camera by John Franklin (see Vol 12/4 for details).   
Two photos showing Bob Kerkhof,   C.G.Sanders, Mrs Kerkhof (in headphones) and Bob Mejier.

Volume 15 Number 3
[3] A Portable NBTV Workshop (12)   by John Franklin. 
[4] NBTV System using Dynamos   by Graham Nutt.   Comprehensive article with descriptions, mechanical and  circuit diagrams.
[8] Video and Sync Mixer   by Deryck Aldridge.  DC restore and sync insertion.  Also shows sync pulse generator.
[9] Diode Breakdown Voltage Tester  by Jeremy Jago.   Tests breakdown voltage of rectifier diodes.
[11] Oscilloscope Tip  by Deryck Aldridge.  Using resistors to combine two signals to allow both on-screen together with single-beam CRO.   This is NOT dual-trace ... you have to interpret  the combined waveform.
[11] ERRATA  in Vol 15/2 p6, a complete line was omitted in 4th para of J.J.'s synch motor article.  The missing line follows the one ending in "allowed"and should read "sufficient discharge to stop the thyristor unlatching.  Similarly, resistor R1 . . . "
[12] Photo-News.  Graham Nutt's PMT and dynamo camera and same camera with dummy
Graham's bead disc (this issue).
Sequential colour receiver spotted by Peter Yanczer.
"Cooley Rayphoto Radio Picture Receiver Kit"
A Farnsworth image dissector tube.

Volume 15 Number 4
[3] Annual NBTV Convention Announcement.
[4] Experiments with Selenium  by Les Smith.   Selenium sensor cells.
[5] High Voltage Capacitors  Sendz Components - don't they still advertise in "Television"?
[5] Dutch Language Announcement.
[6] Linear Sawtooth Generator   by Deryck Aldridge.   Uses P.U.T. and constant-current source.
[7] Programmable Unijunction Transistors  by Doug Pitt.  Description and circuit for this useful device.
[8] Pulse and Bar generator   by Dave Sumner.   Useful test equipment using 555s.
[9] Film and NBTV   by Jeremy Jago.  Film viewing device, with circuit.
[10] Sawtooth CRT Deflector (with deflection plate drivers)   by Deryck Aldridge.  Timebase + HV longtailed pair.
[12] Photo-News.  Photo of Colin Graham, Malcolm Baird, Ray Herbert, Ben Clapp and Norman Loxdale.
Projection stage of "solid" TV picture generator (i.e.3D).
Peter Yanczer's apparatus for testing a home-made Kerr cell
Close-up of smaller Kerr cell.

Volume 16 number 1  1990
[3] Continuosly Tunable Low-Pass Filter   by Joe Bubez.   1-10kHz  with TLO84's and CMOS switches etc.
[6] ERRATUM   Correction to Les Smith's article Vol 15/4.   "this cardboard" should read "thin cardboard".
[6] New Thoughts on Using Selenium    by Les Smith.  Descriptions and diagrams of selenium cell usage.
[6] Hastings Fire   Near-miss for premises used in Baird's experiments.
[7] "Stripper" Circuit Boards   The club may still have a few.
[8] 1990 NBTV Convention    Report.
[8] "Baird" Film    Short film on Channel 4.
[9] Our Front Covers.  Comments on pictures on Volume 15's front covers.
[9] CRT Deflector Circuit   by Graham Nutt.   250v push-pull driver for electrostatic CRTs.
[10] What Happened to Photomultipliers?   by Jeremy Jago.   Comments on PMT v solar-cell cameras.
[10] QRP Fixtures   Announcement by Dave Buddery.
[11] On Screen   Demise of Belgian TV mag "On Screen".
[11] Anerly Talk    Talk on "Baird TV History at Crystal Palace" at Anerley
[11] Dutch Talk   by Bob Mejier of VERON.
[11] News Scoop!   NBTV mag scoops "New Scientist"
[11] Don McLean Article  in May "ST World"  American-based Atari computer journal.
[12] Phase Correction Circuit    Phase-correction circuit for replayed tapes.  Solid-state,  no inductors needed.
[12] Photo-News.   Ammonium dihydrogen phosphate crystals grown by Peter Yanczer for Pockel cells.
Peter's  mirror-drum  components and built-up drum.
NBTV Convention:-   Dave Sumner adjusts his signal processor.
Ripley Pedro explains his tape-to-CRT circuitry.
Les Robotham (with synchronous motor) and Deryck Aldridge.

Volume 16 Number 2
[3] Let's Try a Different Display   by Les Smith.  Strictly for the enthusiast, but interesting.
[4] Mechanical Sync Circuit   by Doug Pitt.  Enables two rotating devices to be synchronised on "master-slave" principle.
[5] NBTV On The Air   by Dave Sumner,  G3PVH.   Radio transmission/reception experiments.
[6] The LM380 for NBTV   by Doug Pitt.   Applying this useful i.c., with circuits etc.
[8] Air Mail Surcharges
[8] Reduced Subscription   for unemployed, O.A.Ps and students.   (also available to BATC members).
[9] Looking Back   by Roy Prescott.   Looking back to early days and the "ideas sheets".
[9] Ideas Sheet Number 18   Adapting a 405-line TV to 32-line working as a monitor.
[10] ERRATA   Error in July issue's Photo-News.
[11] Video of Talk   Video recording of Clapp, Bridgewater, Herbert talk at Anerley Town Hall.
[11] NBTV in U.S.A.   News from Jim Hawes, KB9EPQ,  Illinois.
[11] Book Offer.   Camden Books are currently offering reprint of  C.F. Jenkins' "Vision by Radio"
[11] 30-Line Disc   Peter Yanczer has unearthed drawing of 30-line scanning disc dated 17th November 1930.
[11] Steve Ostler   News on his equipment.
[12] Club Accounts  Summary.
[12] Club Services.   Services available.
[12] Photo-News.   Graham Nutt's  bead-disc receiver and photo of display.
32-line images displayed on 625-line raster.
1930 mirror-drum. 
Photo of Alan Short's caption card.
Photo of 64-line display from Alan Short's 64-line disc camera.

Volume 16 Number 3
[3] Report   by Ladislav Vig   on experiments with a laser-beam scanner to produce a raster.
[3] ERRATA  for Vol 16/2   p7, line 15 should read "another 8", NOT "another 6".
   Vol 16/1  Photo-News  caption should have been "disc drive stepper motor", NOT "synchronous motor".
[3] Ben Clapp  Announcement of death.
[3] INDEX  Printed index up to Vol 11 has been compiled by Chris Koryinski, who will produce a supplement up to Volume 11.
[3] Baird Article   in "New Scientist" dated 15th December 1990 on Baird's 600-line HDTV colour system demo.
[4] Two Missing Pulse Circuits  by Jeremy Jago.   Descriptions plus circuits.
[4] Report   by Dave Sumner  on his 8" disc camera with PMT.
[6] 555 Sawtooth Generator   by Deryck Aldridge.  Descriptions plus circuits.
[6] The G-QRP Club   Advert.
[7] Disc Receiver Circuits  by Pete Smith  G4JNU.   Sync generator, variable negative supply and motor controller.
[8] Hughes Plaque  Plaque erected to early radio pioneer.
[9] Using the OCP71   by Alan Short.  Descriptions and sketches of usage and lenses.
[10] Dates  Date of BATC Rally, provisional date of NBTV  Convention.
[11] Let's Try a Different Display (2)  by Les Smith. 
[11] Phasmajector   Jeremy Jago asks "Just WHAT is this 1930s device?"
[12] Obituary for Benn Clapp, Pioneer of Wireless and television
[12] Photo-News  Photo of Pete Smith's "Televisor".
One of last photos of Ben Clapp.
Picture of giant "optical lever" apparatus built for Baird in 1928. 
Dave Sumner's nearly-built camera.

Volume 16 Number 4
[3] Annual NBTV Convention   Announcement.
[4] PMT Amplifer  by B.J. Arnold   Some circuitry.
[4] Another LM380 Circuit   by Doug Pitt.   Bridge amplifier circuit using two LM380s.
[4] 1991 BATC Show.   Announcement.
[5] Scan Direction   by Jeremy Jago.  Directions of scan, and the reasons for best choice.
[5] Stroboscopes.   Stroboscope pictures for setting disc speed using neon illumination in 50 and 60Hz areas.
[6] Peter Yanczer has continued his experiments with ADP crystals (see photo in Vol 16/1).
[6] British Vintage Wireless Society   Advert.
[6] 405 Alive  Magazine   Advert.
[7] More Mechanical Sync   by Doug Pitt.   Descriptions and circuits.
[8] PMT Camera   Dave Sumner's new circuit.  Simple, but works.
[9] Optical Probe   by Alan Short.  Useful probe for setting-up a new camera, with description and sketches.
[10] Cadmium Sulphide TV?    by Doug Pitt.  Difficulties in using this type of cell.
[11] I.C. Mounting Technique   by Dave Sumner.  How to make a "stick-on" i.c. socket.
[11] New NBTVA President.   Election of C. Grant Dixon  G8CGK
[11] Obituary  for Les Smith.
[11] ERRATA  In last issue "Miller transistors" SHOULD have been "Miller transitrons" in Jeremy Jago's Article.
[12] PMT camera experiments   by Graham Nutt, with additions by Doug Pitt, on pitfalls of getting PMTs working.
[12] Photo-News   Thirties 8" mirror drum.   The Late Les Smith.
Phonic wheel synchronous motor by Peter Yanczer.
Telecine apparatus by Peter Yanczer.   EHT generator by Jeremy Jago. 
Selection of cadmium sulphide cells.

Volume 17 Number 1  1991
[3] Progress with Cadmium Sulphide Photo-cells   by   Joe Bubez.  Problems to be considered.
[4] Simpler CRT Supplies   by  Jeremy Jago.   Ways to save on costly capacitors for mains-derived EHT supplies.
[5] NBTV Progress Report   by Roy Prescott.   Tips on assembling the kit.
[6] Mechanical Scanning Light Sensors   by Chris Long.   Details a number of points regarding various sensors   including signal/noise ratio,  sensitivity,  spectral sensitivity, etc., with circuits of photodiode amplifiers.
[8] Scanning Holes   by Doug Pitt.  Comprehensive article on importance of disc scanning holes parameters.
[10] 1991 NBTV Convention   Report.
[11] Reports.      Dave Sumner on talk and NBTV demo.
    Gorleston QRP Meeting.    Dave Buddery reports extended range of hobbies.
     Bjorn Bjurtorp   reports on his equipment.
     Steve Ostler  has now built the 1952 "Practical Television" "Argus"  TV set.
[12] Obituary  for Lesley Albert Smith.
[12] Distance Record.  Australian long-distance record for speech modulated onto light
    from high-power LEDs.
[12] Photo-News.   Surviving specimen of  "Telcan" domestic VTR.
1934 mirror drum built by Harry Arnfield G3LX.
Pete Smith being televised in 625 lines and 30 lines via scan converter. 
Replica "Televisor" by Pete Smith.
Dave Sumner demos his new PMT disc camera.
Doug Pitt and Grant Dixon watch demo of 50MHz Tx/Rx by Rennie Hall.

Volume 17 Number 2
[3] Simple Sync   by Rennie Hall.  Using a synchronised 555 i.c. timebase generator with an oscilloscope display.
[4] Scanning Holes (2)  by Doug Pitt.   This issue deals with focus.
[4] Fully photographic Scanning  Doug's follow-on to above covers use of photo-masks rather than mechanically-cut holes in scanner.
[6] David Hughes Plaque    Unveiling of plaque to David Hughes,  inventor of the microphone.
[7] Small Photosensors with Discs   by Chris Long.   Comprehensive article on focusing on small-area sensors with condenser lenses.
[11] The Telcan   by Doug Pitt.   The first domestic video recorder.  120 inches/sec tape speed!
[12] Dutch Meeting.   The Phonographic Museum in Utrcht has closed, losing the Dutch groups' meeting place.
[12] Plastic Drops.  Possible method for home-made bead lenses.
[12] Photo-News.    Rear view of Graham Nutt's camera-monitor. 
Peter Yanczer's synchronous motor camera.
Peter's companion receiver to his camera and his 48-line mirror drum receiver.
Dave Gentle (G4RVL)'s Mk I and Mk II cameras and cradle with lens turret to fit both cameras.

Volume 17 Number 3
[3] Basic NBTV Techniques   by Doug Pitt.   Beginners' information on how to mark out a disc.   N.B. Article continues on page 5.  My pages 5/6 are reversed.
[4] Annual NBTV Convention  Notice
[5] Alan Short is onto his 57th Camera.   This is NOT a typographical error!
[5] Peter Yanczer has acquired two 1930 TV receivers, 60-line and 45-line TRIPLE-INTERLACED.
[7] One-Chip Pre-amp   by Peter Yanczer.  Photocell pre-amp using cascaded sections of LM381 i.c.
[7] Manchester Talk   Talk by Roy Prescott at Royal Television Society.
[8] NBTV on MARS! (Well, slow-scan anyway)   by Roy Prescott.  Description of Mars Probe camera.
[8] Steve Ostler   Has now converted his 1952 "P.W Argus"  TV receiver to 405/45 lines dual standard.
[9] A U.S. Television Pioneer's Recollections   by H. Scott Killgore.  Back-room shenanigans.
[9] ERRATA   in last issue's "Telcan"  article "Westgrove" SHOULD be "Wesgrove" and "Antex" SHOULD be "Ampex".
[9] BATC Show   Notice.
[10] Photographically-Made Scanners   by Jeremy Jago.   Photo film images used for scanning "holes".
[11] Blue LEDs Update   by John Franklin.   Practical information, but much cheaper, brighter versions now available.
[12] Photo-News.   Steve Ostler's completed "Argus" project.
Jeremy Jago's set-up for producing photographic loop for aperture drum.
60-year-old "Western"  disc scanner and TV.
Peter Yanczer's "S.W & T.V. Corp" receiver.

Volume 17 Number 4
[3] Notes from my "NBTV Ideas File"   by John Franklin.   Improving shape of disc-scanned pictures.
[4] Slow-Scan Tape.   Grant Dixon has VHS tapes describing the 1976 "Viking" Mars and 1979 "Voyager 1" Jupiter missions.  These are SLOW-SCAN 128-line images.
[5] Strange Scanning Devices   by Ray Herbert.  Inc "honeycomb" cell and "optical lever".
[6] Mechanical Pattern Generators   by Jeremy Jago.  Use of computer-generated radial lines on paper for test pattern signals. Note: article reports "phasmajector" is older term for monoscope.
[7] BBC Radio Show  at Broadcasting House
[8] 48-line Disc Camera   by Alan Short.  Pre-amp circuit plus some sketches.
[9] Basic NBTV Techniques (2)   by Doug Pitt.  Curvature distortion and a combination camera/monitor.
[10] Behind the Disc.   Lenses, mirrors sensors and focussing.
[10] NarrowER-Band TV.  Jim Hawes K9EPQ (Illinois) is experimenting with slowed-down NBTV and proposes quadruple-interlace to reduce flicker.
[11] 1992 NBTV Convention.  Report.
[11] New Ideas.  (1) better fixing of disc-beads and (2) using very short opto-fibre "light-pipes" in disc holes.
[11] New Early TV Book.   Tony Bridgewater's book.
[12] Book Offers  from Chevet Book Supplies.
[12] ERRATA   In Vol 17/3 at bottom of page 3  This mistake occurs twice.   "130" should be "260". 
[12] The G-QRP Club  
[12] Photo-News.   2 vintage 30-line items (1) caption stand and (2) flying-spot mirror-drum projector.
Alan Short's new camera and wooden chassis.
Jeremy Jago's test signal gen. as p. 6.
Peter Yanczer's  24-line disc.

Volume 18 Number 1  1992
[3] Notes from my "NBTV Ideas File"(2)   by John Franklin.   Fresnel lenses, beads and their mounting.
[5] An Unusual Oscilloscope   by Jeremy Jago. Restoring Soviet-made oscilloscope sold under "Synchroscope" label etc.
[5] Triple Waveform Generator   by Pete Smith  G4JNU.  Handy, cheap design providing pulse and bar,  8-level grey scale and checkerboard pattern - and all with just 3 CMOS chips!   Believed to be the club wavegen kit.
   N.B.  See Vol 18/4 for easy mod to add "missing pulse" sync.
[6] NBTV Closed-circuit System   by Graham Nutt.  Full circuit and details of Graham's equipment, which has PMT camera and VCR139A CRT display.
[8] Basic NBTV Techniques (3)   by Doug Pitt.  Light leakage reduction, more on discs and drums.
[10] Peter Yanczer   continues his work with amonium dihydrogen phosphate crystals for Pockel Cells.
     N.B.    There are also notes about Kerr cells and the "Scophony" TV display and light-modulated cells.
[11] NBTV Software Programs  for BBC and Spectrum computers,  by Richard Wilmot GW3RRI.
[11] Filing NBTV Newsletters   by John Franklin.  Capacious binder available.
[12] ERRATA   The SSTV tape available from Grant Dixon (last issue, p8) is entirely SSTV signals, NOT VHS.     Contact Roy Prescott for VHS tape.
[12] Peck TV   Reference to a Canadian company making claims of  14" 180-line picture from 3" disc!
[12] 405 Alive Magazine   Advert.
[12] British Vintage Wireless Society   Advert.
[12] Photo-News   Peter Yanczer's Jeffree cells and colour filter disc - discs of this type were used for colour-sequential  transmissions in early 50s.
Portraits of Afyn Stock and Mike Mucklow taken from screen at this year's  BATC Show.
Picture from screen of Alan Short on 96-line disc.
Steve Ostler's 3-colour monitor.
   
Volume 18 Number 2
[3] Deryck Aldridge death.  Appreciation in next Newsletter.
[3] Computers and NBTV   by C. Grant Dixon.  Defining grey-scale pixels etc.
[4] More About Blue LEDs   by John Franklin.  Price reductions, but now even better and cheaper.
[5] Notes from my "NBTV Ideas File"(3)   by John Franklin.   Studio equipment for manipulating NBTV pictures.
[6] ERRATA   In Vol 10/3 page 11  "picture aperture" SHOULD  be "objective aperture".
[7] Basic NBTV Techniques (4)   by Doug Pitt.  Pinhole-type cameras, plastic lenses etc.
[9] Miniature Solar Cells.   Peter Yanczer reports possible source.
[9] Mirrored Perspex  delivered to club sales - some MAY be still available.
[9] Book Review   Tony Bridgewater's "Just a Few Lines".  May still be available from club sales.
[10] Book Review   The BBC: 70 Years of Broadcasting,   author John Cain, reviewed by Ray Herbert.
[10] Ian Deacon  has sent-in clipping from "Electronics Times" (3/9/92) saying Marconi are to invest lotsa dosh in developing analogue video-telephones.  There is also a lot of other info on video-phones.
[11] FM Recording System    by Pete Smith G4JNU.  Circuits for FM-modulator and demodulator for tape recordings.   It is believed some simplification or cheaper circuits were later published.
[12] Photo-News.  Televisor acquired by Keith Wilson and its cogwheel sync device.
First receiver built by Jim Sawkins (Swansea).
Disc puncher and experimental receiver by Benny Ahlburg of Denmark, with close up of cog-wheel to show its construction.
   
Volume 18 Number 3
[4] Computers and NBTV - Again  by C. Grant Dixon.  Hardware needed.  N.B.  There is now better stuff for the P.C.
[5] Condolences  to C.Grant Dixon on loss of his wife, Eunice.
[5] Peter Yanczer  reports updates on his work with Jeffree cells.
[5] Deryck Aldridge . . . An Appreciation.
[6] Transatlantic Television in 1926   by Ray Herbert.  Comprehensive article of great historical interest.
[8] Basic NBTV Techniques (5)   by Doug Pitt.   Polygons, mirrors and technical stuff.
[10] Reports.     Steve Ostler   is still working hard on a closed-circuit COLOUR NBTV system.  Dave Gentle  G4RVL has been building experimental mirror-drums, using the club's mirrored plastic.
[10] Club Data Library.   Availability of data for those handy-but-awkward parts.
[11] Misbehaving Motors   by Dave Buddery  G3OEP.   Comments on built-in tape motor speed controllers.
[11] Some Unusual References   By Jeremy Jago.   Historical references to vintage LDTV.
[12] FM Tape-Recording System   Pete Smith's update on the last issue, using a much cheaper modulator i.c.
[12] Photo-News.  Late Deryck Aldridge with his drum camera at Convention '84 and his punching device for aperture drums.
Two of Peter Yanczer's ball scanners.
Peter's ADP crystal, his Jeffree cell and his early Jenkins kit.    Does this man EVER rest?!

Volume 18 Number 4
[3] NBTV Sync and Test Pattern Generator   by Klaas Robers PA0KLS.  A very complex circuit to generate every test pattern you could ever want.
[4] Annual NBTV Convention   Announcement.
[7] CRT Screens   by Jeremy Jago.   Screen phosphors, their persistence, time lag, brightness and dual phosphors.
[8] 70cm NBTV Transmission.   Rennie Hall reports a successful transmission of 32-line images over about 1 mile on 437MHz at excellent signal/noise ratio for this AM transmission.
[9] Channel 4 Programme Series  entitled "The Long Summer" has the rise of radio and TV in its 2nd programme.
[9] Strange TV Devices.  Jim Hawes of Illinois has uncovered reports of strange TV devices in U.S.A. in 1930s.   Includes special neons and one device spinning above a pool of sulphuric acid!
[9] Circuit Mod of Triple Waveform Generator  (Vol 18/1).  Simple mod to add "missing sync pulse" facility.
[9] Club Technical Standards   by Keith Vickers.   Suggestions on practical standards for supplies, connectors, signal levels and polarity, types of cable and source resistance.
[10] Film Review - 58 Years Late   by Jeremy Jago.  Review, via Andy Emmerson's copy, of a rare 1935 TV-themed B-movie thriller.
[11] Basic NBTV Techniques (6)   by Doug Pitt.  Synchronisation and blanking of scan-line ends, with some diagrams
[6] Photo-News  (Photos on back page).  Displays from Dave Sumner's 32-line to 625-line converter.
Alan Short's  OCP71 plus pre-amp unit.
Jeremy Jago's partly-completed film-scanner (telecine).
Youthful C.Grant Dixon at controls of his colour-sequential colour TV receiver.

Volume 19 Number 1  1993
[3] My Thoughts on NBTV   by Rennie Hall  G8PDJ.   His view of  NBTV from the angle of a radio amateur.
[4] Another Starange TV Device   Further to the item in the last issue, Jim Hawes has uncovered a device by William Peck.  (Use your FIND facility.  There is another reference to Peck elsewhere).
[4] Printed Circuit Board.    C.Grant Dixon has used a Cad program to draw a printed circuit board for Pete Smith's triple waveform generator.
[5] Book Review.   "Beyond the Broadcast Bands" by Richard Wilmot.   Utility stations and other mysterious stuff.
[5] G.T.C. Television.   The extract from H. Scott Killgore's letter to Jim Wood has thrown up much correspondence.
[6] TV Pioneer Honoured.   Ray Herbert sends news that Tony Bridgewater has been awarded an honorary degree at Bradford University.
[6] Mod to Mains-Locked Motor   by Jeremy Jago.  An anti-hunting circuit has been added to J.J.s synchronised (mains locked) DC motor.  This circuit was untested at publication.  See Vol 15/2.
[7] Mirror Drum Jig   by Alan Short.   Make accurate mirror-polygons quickly.
[7] Telecine  Jeremy Jago's work and reference to Peter Yanczer's work.
[8] NBTV Convention 1993   Report.
[8] 405 Alive   Advert for magazine.
[9] Basic NBTV Techniques (7)   by Doug Pitt.  Opto-forks, sync-triggered timebase, motor speed control etc.
[11] "Television Made Easy"   may still be available from club sales.
[11] Floppy Disc Drives   make excellent scanning disc drivers, but models vary widely and some are easier to use than others.
[12] Photo-News.   Convention 93 photo of Pete Smith's  BBC computer-converted NBTV.
Rennie Hall with 70cm receiving gear.
Peter Yanczer's 60Hz-50Hz converter and his U.S. version of Jeremy Jago's mains-locked motor.
Dave Sumner with his 32-line to 625-line converter. 
Dave Gentle shows Les Rowbotham his mirror-drum.

Volume 19 Number 2
[3] Sensors, Pre-amps and matching   by Keith Vickers G1NAF.   Getting the best signal-to-noise ratio from your sensor, with diagrams.
[5] Caption or Pattern generator   by Des Kostryca G8WEI.  Pattern generator built around EPROM with diagrams.
[8] FM Test Oscillator   by Jeremy Jago.   Simple circuit for handy test unit.
[10] NBTV Videotape.   C.Grant Dixon has produced a videotape of Alan Short and his enormous collection of equipment and various shots of persons and equipment at the 1993 NBTV Convention.
[11] Alan Short  sends in a report on his latest camera-monitor using mirror drum and Nipkow disc.
[12] One-transistor Transmitter   by Dave Sumner.  Crystal-controlled design gives about 1mW on 2 metres.
[12] New Commemorative Plaque at Broadcasting House.
[12] Photo-News.   Peter Yanczer with 45-line camera with 45-line triple-interlaced horizontal scanning (phew!).
Peter Yanczer's 16-photocell arrays and bike dynamo motor assembly.
Bead disc and mirror drum by Dave Gentle, with picture from his Nipkow disc lit by ultra-bright yellow LED.

Volume 19 Number 3
[3] OCP71 frequency Response   Information and circuit.
[3] Phono-BNC Adaptors   are now commonly available.
[4] Annual NBTV Convention  Announcement.
[5] Basic NBTV Techniques (8)  by Doug Pitt.   Motor-speed control circuits, DC restoration and sync-tip clamping.
[7] Steve Ostler  reports on his latest 2-channel colour NBTV experiments, with note by Doug Pitt.
[8] 1994 BATC Show is on 1st May at Coventry Sports Connection.
[8] Dave Gentle has been carrying out experiments on 2 metre band with John Whelan G7HHZ about 7 miles away.
[8] Dave Sumner gave an all-day demo of NBTV at the Chalk-Pits Museum.
[9] In Memorium  -  F. Kerkhof   by Bob Meijer.
[9] "Beyond the Broadcast Bands" is available only from author - address given
[9] Magnifying Lens.   Maplin's "Large magnifier", order no. ZF01B, is very suitable.
[9] Fibre-optic Scanner Drum   by Roy Prescott.  Comprehensive article with some diagrams.
[12] Photo-News.   The late F. Kerkhof.
Roy Prescott's fibre-optic drum in various stages of construction.

Volume 19 Number 4
[3] NBTV Telecine   by Jeremy Jago, with description.
[4] Magnetic Line Timebase   by Jeremy Jago.  Hybrid i.c./valve circuit from above telecine.
[4] Notes from my "NBTV Ideas" File (3) - continued    by John Franklin.   Studio camera mixer.
[6] Basic NBTV Techniques (9)   by Doug Pitt.  Camera head amp, LED driver and neon driver.
[8] Birth of Television   Public lecture by Malcolm Baird at Anerley Town Hall.
[9] The 1994 NBTV Convention.   comprehensive report.
[10] Variable Voltage Regulators.   Use of the LM317T regulator i.c. with circuit.
[10] ERRATA   wrongly-worded caption in last issue's Photo-News.   Also in last issue on Page 3 the word  "hardware" means nuts, bolts, washers etc and not "non-software".
[11] CAT 94  will be held on Sunday 11trh Sept 1994.
[11] New Publication.   "The Bizarre Leisure Book" by Steven Jarvis  includes a section on NBTV.
[11] Neo-Vibracon.   Ingenious camera shown in BBC tv "Tomorrows World".
[12] BATC Show   (1st May, Coventry).   NBTV stand waved the NBTV flag.
[12] Dave Sumner   gave a talk on NBTV on 4th April at Crawley Radio Club.
[12] Photo-News.   Disc-cutter by Peter Yanczer.
Portrait of Grant Dixon via Pete Smith's standard converter.
Rear view of Jeremy Jago's 16mm telecine apparatus.
Edward Nowill examines Dave Buddery's ratcheted frame-scanner. 
Steve Ostler's colour camera-monitor.
Multiple images from Ripley Pedro's digital display.

Volume 20 Number 1  1994
[3] Front Cover   J.L. Baird.  See Ray Herbert's article.
[3] LED Matrixes  and John Franklin's efforts to make a giant display.
[4] Book Review   "The Sound and Vision Yearbook  1994/5" (first year) edited by Andy Emerson.  Reviewed by J.J.
[4] Bush for Discs etc.   by Alan Short.  Connecting a disc or similar on a thin (2-2.5mm) axle.
[5] ERRATA   Vol 19/4, p7 2 problems with camera head amplifier and Vol 19/1, p9 resistor should be in source of fet,  NOT its gate.
[5] Obituary  for Norman Loxdale.
[6] J. L. Baird's "Telechrome" CRT Colour and Stereoscopic TV August 1944-August 1994 by Ray Herbert  Baird's operating 2-colour and proposed 3-colour systems.
[7] NBTV Video Processor   by Klaas Robers PA0KLS.   Very comprehensive video processor with descriptions and diagrams.
[10] Low-Tech NBTV Signals for All   by Doug Pitt.  Making NBTV slides with an old Aldis projector.
[11] A Variac Tip   by Jeremy Jago.   Use of cheap surplus 110v units for ca. 24v and adaptation to 240 v via auto-transformers.
[11] "Button"/"Teddy bear's eye" Solar cells  by Doug Pitt.  Comments on these cells in voltaic and resistive mode.
[12] Review of "Edmund's Scientific" catalogue.   Expensive but excellent source of optical components.
[12] Valve and CRT Data.   Jeremy Jago may have the data on that device of yours.
[12] Dayton Hamvention   Grant Dixon gave a programmed talk on NBTV.
[12] Photo-News.  Doug Pitt, Rennie Hall and Ted Hardy at 1994 Convention. 
Dave Gentle at Convention.
LEDs used by Peter Yanczer for receiver experiments.
Circuit board of Klaas Roberts NBTV processor (this issue).
Peter Yanczer's PMT amplifier module and his 3-disc + PMT cameras for 45-line triple-interlaced scanning.

Volume 20 Number 2
[3] The Baird Synchroniser  by Jeremy Jago.   How did (or could) it work?  J.J. discusses
   this vintage device.
[6] Kerkhof's Experience.   Appreciation of Freek Kerkhof and his career.
[7] John Logie Baird Centre  is planned for the Cathedral area of Glasgow.  
[7] John Franklin's giant NBTV display has made further progress, with some details here of array wiring.
[9] Notes from my "NBTV Ideas" File (4)   by John Franklin.  Some very strange (but perhaps workable) ideas using the eyes and brain's ability to "smooth" images.
[11] Des Kostryca's 19.2 kHz crystal oscillator.  Circuit.
[11] More Colour NBTV.  Steve Ostler's  work on colour NBTV.
[12] Flying-Spot Pictures.  Jan Chapman sends diagram recalling how he once used three oscilloscopes and a PMT to make a flying-spot CCTV system.
[12] Photo-News.   Bust of J.L.Baird.
Bernard King's very small model "Televisor".
C.F.Jenkins TV receiver ca. 1930.
Flying-spot CRT unit by Jeremy Jago.
Bill Fox's disc camera and his camera gear for locking to mains supply.

Volume 20 Number 3
[3] Front Cover.   Ted Bray operating a telerecording camera at Baird's Crystal Palace laboratories.
[3] Printed Circuit Patterns   Two of Deryck Aldridge's designs now have PCB patterns designed for them.
[3] Vintage Radio Communications Fair   at Birmingham at National Exhibition Centre on Sunday 4th May.
[3] Crater Lamp Substitute   by Peter Yanczer using 6000 mcd orange LEDs.
[4] Annual NBTV Convention  at Loughborough, Saturday 22nd April.
[5] Scanning Circuits for a LED Matrix  by C.Grant Dixon.  Comprehensive article of  LED matrix driver + circuits.
[7] An early Semiconductor   by Jeremy Jago.  The "Radiovisor Bridge" light sensor, with circuits.
[8] New Products (part).  Elektor magazine announces a film (with supplier) which can have a pcb printed or  photocopied onto it, then hot-ironed onto copper-clad board,  the image forming etch-resist.
[8] Nipkow Lives.  Reference to disc-scanner used down to 0.6 micron images.
[9] Notes from my "NBTV Ideas" File (5)   by John Franklin.  reflectors and mounting lenses.
[10] Crystal Palace Magazine   Description and supplier.
[11] Tip for Mounting Discs   by Dave Buddery G3OEP.   Useful tip.
[11] Alan Short's sketch of his latest mirror drum camera.
[12] Radiovisor Bridge.  Ruiz Bruno has one (see Photo-news and J.J.'s article earlier in this issue.)
[12] 1995 BATC Show  to be held on Sunday 30th April.
[12] Photo-News.   Peter Yanczer's disc-marking apparatus and in use to set 24 lenses in an accurate spiral.
Front and rear views Of Grant Dixon's large red LED matrix. 
Radiovisor Bridge - see 2 references in this issue.
John Franklin's very inexpensive concave mirror described in this issue + equivalent Bell & Howell part.

Volume 20 Number 4
[3] NBTV Convention 1995.   Report.
[4] Notes on the LED matrix   by C.Grant Dixon.
[5] Notes from my "NBTV Ideas" File (6)   by John Franklin.   Metal enclosures to protect circuitry and mirror-screws.
[6] Crater Lamp Substitute   by Peter Yanczer using 6000 mcd orange LED.   Description and construction diagram.
[7] Notes from a Different File   by Doug Pitt.  Methods of obtaining the improved pictures described in John Franklin's "Ideas File" No. 4 in Vol 20/2 with diagram.
[9] Amateur Band Data.   Appeal for data on radio amateurs able (or willing) to take part in NBTV transmissions.
[10] Cadmium Sulphide Cells.   In Vol 17/1 Joe Bubez showed how to maker a CdS cell "go faster".  He was able to show at this year's convention a demonstration so successful he is going to build a camera to try them.
[10] Computer patterns.   Pictures of computer patterns for NBTV generated by C.Grant Dixon.
[11] Steve Ostler  is working on a pair of Mihaly-Traub scanning devices, transmitter and receiver. (see Vol 11/4).
[11] Useful metals for Constructors.   Useful parts from building trade suppliers.
[12] Photo-News.   Parts of Peter Yanczer's neon substitute
Pedro demos his digitised system
Dave Gentle's semi-authentic "Televisor" produces excellent pictures
Grant Dixon demos his giant LED display.
Pete Smith's apparatus inc HDTV camera, 30/32-line converter, transmitter, receiver, re-converter, display.
Large fast-phosphor display in Jeremy Jago's exhibit.

Volume 21 Number 1   1995
[3] Front Cover  J.L. Baird's outside broadcast van.
[3] New Zealand NBTV.  Con Wassilieff ZL2AFP outlines a system for 24 lines, 8.333 f.p.s. to reduce bandwidth by half for amateur radio transmission.
[4] Infra-Red NBTV.  Information on use of IR diodes for NBTV transmission over very useful distances plus parts source info.
[5] Cadmium Sulphide - The Story So Far  by Joe Bubez.  report on Joe's results up to present, plus circuit of frequency-correcting CdS pre-amp.  Note: A capacitor between base and emitter of the current source transistor may materially reduce noise.
[6] Fire-Wheels and Other Animals  by Doug Pitt.  Practical experience of experiments with this device plus suggested further development.
[7] Amateur Band Data.  Appeal for further information from amateur stations with possible NBTV capability.
[7] Overseas Payments  Warning that payments can now only be accepted if in pounds sterling against a UK based bank.
[8] Club Standards - a Restatement.  Video and audio standards so your stuff matches everyone else's (well, almost...).
[9] PCB Production - a New method  by C. Grant Dixon.  Using a PC for layout design and "printing" the design onto a copper-clad sheet.
[9] Missing-Pulse Detector  by Jeremy Jago.  Basic and buffered circuits to supply the "missing" frame sync pulse.
[10] Recommended Photo-Transistor.  Alan Short reports on a Maplin part which is even better than the OCP71.
[10] NBTV Talk.  Talk given to Thornton-Cleveleys Amateur Radio Society.
[10] Club Literature.  Deryck Aldridge's "NBTV" articles, "Basic Techniques" by Doug Pitt.
[11] Early French NBTV Standards  from Ruiz Bruno.  Early French TV formats and references.
[11] Another Crater-Lamp Substitute.  Info from Andrew McGuffie on supply sources and use of a £28 blue LED with the end sawn off (chest-clutching stuff!) for fax-type weather satellite plots, with possible NBTV applications.
[12] New Mechanical TV.  Info from editor of CQTV and Paul Marshall G8MJW.  Fantastic microscopic array of moving parts.
[12] Photo-News inc mirror-drum camera using cam-operated frame scan by Alan Short.
Joe Bubez with ancient gas-focussed CRT.
Portrait of Grant Dixon, taken from screen of Jeremy Jago's monitor
Dave Gentle's large disc monitor without cover, much influenced by Baird Televisor.
Three 24-line portraits taken from screen of C. Wassilieff's camera-monitor which uses cadmium sulphide sensor (see p.3).

Volume 21 Number 2
[3] An Improved Pattern Generator   by C.Grant Dixon.   EPROM-based generator with circuit and pcb layout.
[6] Easy Mirror-Drum Cameras   by Alan Short.  Polygon-type drums and their construction, with sketches.
[8] Notes from my "NBTV Ideas" File (7)   by John Franklin.   More on the "Frame wobble" idea and Doug Pitt's comments.
[10] Laurie Booth   has recently completed an NBTV drum camera.
[10] Con Wassileff  More about his experiments on cadmium-sulphide photocells.
[10] Steve Ostler   reports further progress on his Milhaly-Traub scanner and can produce a bright 70-line raster.
[11] ERRATUM.   In Vol 21/1, p10, there was an omission of a diode in the lower of the two diagrams.  The corrected circuit is shown here.
[11] Literature Offer (possibly still available)   If you order "Hints and Kinks", "Basic Techniques" and "Selected Articles" together you can have all three volumes for £8 post free.
[11] Old Fax Machines    Contact Graham Smith G1JVZ (phone number given).
[11] Dutch language announcement .
[12] Roy Wathen is building a miniature "picture-frame" oscilloscope using information collected from articles on LED matrices by John Franklin and Grant Dixon.
[12] Book Review  "Birth of the Box" by Ian Sinclair (Sigma Press).   Reviewed by Doug Pitt.
[12] Photo-News.   two of Alan Short's polygon cameras.
24-line portrait from New Zealand of Con Wassilieff.
Jeremy Jago's photo of synchronous motors, believed to be same type as used in Con's camera-monitor.
Con's 24-line camera-monitor  and  Peter Yanczer's "Osglim"  lamp for the Baird "Televisor".

Volume 21 Number 3
[3] Our Front Cover.   Baird (in overcoat) with assistant identified as Wally Foulkes.
[3] NBTV EPROM Video Generator   by Klaas Robers PA0KLS.    Complex but very comprehensive EPROM-based NBTV pattern generator with circuits and descriptions.
[8] Notes from my "NBTV Ideas" File (8)  by John Franklin.  Using bike dynamos for motors. See also "Apology" immediately below article, which clears up mis-understanding over article.
[9] A New Line Imager  by Jeremy Jago.  News on the Texas Instruments TSL 218 diode array photo-sensor.
[10] Annual NBTV Convention  at Loughborough.  Notice.
[11] Dave Buddery  G3OEP reports that he is now able to transmit an NBTV signal on the HF bands.
[11] Steve Ostler  has abandoned his attempts to make a 2-plate Kerr cell - with dire warnings on laser use and easy (and very expensive) destruction!
[11] Dutch language announcement 
[12] Do it Yourself.  Salutary tale from Rennie Hall G8PDJ on the "expertise" (and motives) of even well-known dealers.
[12] Photo-News.  Testcard and portrait on Joe Bubez's cadmium sulphide camera.
Rare photo of French TV pioneer Rene Barthelemy.
Rare photo of Baird with prototype mirror-drum receiver,.
Photo of image from mirror-screw display by Peter Yanczer.
Modified cine-editor as used by Ladislav Vig to produce a raster from a laser "pointer".

Volume 21 Number 4
[3] Obituary for Roy Prescott at age of 65.
[3] Sync Seperator and LED Drive   by Pete Smith G4JNU,  with description and circuit..
[4] Club Literature   including "Hints and Kinks", "Basic NBTV Techniques", "First 20 Years",  "Seeing by Wireless"   Some or all may still be available.
[4] A P.C.  as an NBTV Display   by Graham Lewis with circuits and description.  N.B.  as this is a very lengthy article it is not published in full - write in for full text.
    N.B.  To run this software you need a P.C. with a bi-directional  printer port, e.g. EPP.
[8] 1996 Convention.   Report.
[9] Z-Modulator  by Joe Bubez.  Sends modulated-RF waveform for tube grid to overcome poor CRO LF response.
[10] Notes from my "NBTV Ideas" File (8)  by John Franklin. Idea on back-illumination of display.
[11] Reclaimed Parts: A New Source   by Jeremy Jago.   Using scrap CD players for valuable components.
[11] Amateur Band Data   Location of SOME NBTV-capable amateur radio stations.  Get yours in!
[11] 1996 BATC Show  Report on NBTVA stand at the show.
[12] Ladislav Vig  is working on large projected rasters with a laser pointing device.
[12] ERRATUM  Les Robotham points out a smudged number in Deryck Aldridge's high-impedance voltmeter in Vol 13/3.  Pin 5 on the op-amp is smudged and can easily be mis-read as 8
[12] Photo-News.  Pete Smith's "Stooky Bill"  down-converted to CRO display.
Graham Nutt's valve gear and PMT camera-monitor.   
Dave Gentle shows Garth Porter and Laurie Booth his LED matrix display and giant commutator inspired by Baird's `Giant Screen' demonstrations.
"Mystery" TV discovered by Keith Wilson which could never have worked (shop-window display?)..
Steve Ostler with his Mihaly-Traub videophone.
Grant Dixon's still picture generator and EPROM program editor.

Volume 22 Number 1  1996
[3] Front Cover shows Sidney Moseley (seated) with J.L.Baird and his 1928 frame-sequential colour receiver.
[3] News From Belgium.    Description of layout of Patrick de Scheemaeker's camera and monitor, plus cartoon. The circuit of the solar-cell head amp is shown - see update in later issues.
[3] Ideas for Discussion   by Jeremy Jago.   Some thought-provoking comments on ideal spot shape and resolution and loss of true black level (and syncs) on tape playback.
[5] NiCad Discharger   by Ray Moores G3G2T (not sure about the "2").  This circuit will discharge nicads down to the level where they can go through the full charge-discharge cycle without suffering damaging over-discharge.
[6] Obituary.   Margaret Baird has died at her home in Hamilton at the age of 89.   A professional pianist, she had a lively personality which she retained into old age.
[6] Mirror-Screws   by Doug Pitt.   Discourse on mirror-screws with information on how they work and how they could be made.
[10] Local Meeting Proposal  by Ted Hardy G3GMZ.   Address, phone and radio contacts given.
[10] Jim Hawes of  Illinois seeks software images of NBTV on DOS disc.  Address given.
[10] Skeleton Opto-Forks.   The club's opto-forks - details.
[11] New Opto-Switches.  The club's new stock of opto-forks, with diagrams.
[11] Pete Yanczer has a 120-line mirror-screw and an Iconoscope.  He hopes to use these in a 120-line CCTV system.
[11] 70 cms NBTV   using existing FSTV equipment, plus possible improvements.
[12] Linear Array Camera  possibility?   Ladislav Vig (Switzerland) already has a display with 32 LEDs and now intends to build a camera using 32 photo-diodes.
[12] Jim Wood (California) describes use of an old portable 5" TV to make an NBTV monitor.
[12] Photo-News.  5 views of Patrick de Scheemaeker (p3) with his mains-locked camera and monitor.
Peto-Scott 30 mirror-screw for reception.

Volume 22 Number 2
[3] Obituary for Rennie Hall G8PDJ  who died at his home in Consett.
[3] Two-Disc Camera-Monitor.   Patrick de Scheemaeker (Belgium) has sent this diagram with some photos.
[3] East Midlands Local Meeting  on 27th October at Nottingham.
[4] Vidicon NBTV Camera  by Graham Lewis.  High-performance, if rather complex, circuit.  Has facitities for mains sync and frame shift to give (slow) 64 and 128-line resolution.   With all circuits and description.
[7] Alexandra Palace.   The Alexandra Palace Trust, anniversary celebrations etc, but search for other references in the mag for problems about the "protected site" status.
[8] British Vintage Wireless Society Show   on 22nd September.  Report.
[8] Notes from my "NBTV Ideas" File (10)  by John Franklin.  Detecting light from white spots on a disc instead of holes or lenses.
[9] Steve Ostler  has now abandoned his Mihaly-Traub project (but learned a lot).
[10] Two-Mirror Drum Camera  by Alan Short.  A few details - more in next issue.
[10] I.E.E. Lecture  by Ralph Barret on "Baird - The Man and his Television".
[11] Unique NBTV Discovery  by Doug Pitt.  Discovery of home recording of 1933 30-line transmission on disc.
[11] South-East local Meeting  at Camberley on Sunday 17-11-96.
[12] NBTV 80-metre Net.  Details of Ted Hardy's (G3GMZ) Saturday-morning net.
[12] Photo-News.  "Daily Express" NBTV kit.
German Tekade machine.
Patrick de Scheemaeker's dual-disc camera-monitor.
New colour camera under development by Steve Ostler.
Dave Gentle's shack with mock-up flying-spot device.
[12] The G-QRP Club.   Advertisement.

Volume 22 Number 3
[3] Annual NBTV Convention  Date, map and directions.
[4] Mechanical Oscilloscope  Notes from Patrick de Scheemaeker on use of LM3914 LED bargraph drivers to make a mechanically-scanned oscilloscope for NBTV work.
[5] Des Kostryca reports on his latest equipment and experiments, with ERRATA for the Improved Pattern Generator of Volume 21/2.  Capacitors on pins 5 and 6 of clock generator are transposed.
[5] BATC Show   Notice of show.
[6] Jim Howes (Illinois) has written a computer program PRNTV to print out an NBTV display, from disk data supplied by Graham Lewis
[7] Notes From My NBTV Ideas File (11)  by John Franklin.  Obtaining 50Hz pulses for dynamotor sync by optical means and incorporating them into the NBTV signal, with diagrams.
[8] Baird's Television Discs.  A report by Ray Herbert on some of J.L.B.'s original experimental discs and their prices when auctioned.
[9] Lenses, Optics and NBTV  by C.Grant Dixon.  Basics with very useful diagrams for beginners, including bent-optics.  Useful tips on getting correct focus.
[12] Photo-News    Patrick de Scheemaeker's "shack" under the house-roof and his mechanical oscilloscope.
Steve Ostler's new colour and sound monitor, specially designed to match his camera shown in last Newsletter.
Alan Short's  sideways-working disc camera, his very small two-mirror-drum design and his display device using two mirror-polygons and a laser beam.
[12] New Type-face used in this issue.  Comments invited.
[12] Late News  via Ray Herbert that Tony Bridgewater, club's former president, has died.   Appreciation in next newsletter.

Volume 22 Number 4
[3] Marc Chauvierre (1901-1996) TV Pioneer.    Article on the work of the French TV pioneer.
[4] Some Hints on Magnetic CRTs   by Jeremy Jago.  Advice on use of magnetically-deflected tubes, with a practical line oscillator and line output stage.
[5] 1997 NBTV Convention.  Report.
[6] Obituary for Thornton Howard (Tony) Bridgewater OBE   by Ray Herbert 1-3-97.
[6] Obituary for Manfred Von Ardenne, German TV Pioneer.
[6] Dave Buddery G3OEP - NBTV schedules On amateur Radio
[7] NBTV On Tape  by Doug Pitt.  The many problems of NBTV tape recording - any answers?
[7] British Association Lecture.   One of the opening lectures - given by Doug Pitt with demos by Pete Smith - will be "Television - The John Logie Baird Dimension".
[7] Hastings Lecture.    Ralph Barrett gives a Baird talk, with demos by Pete Smith.
[8] Cadmium Sulphide - Progress Report  by Joe Bubez. Problems and further ideas.
[8] Club Internet Pages.   Grant Dixon has generously allocated some pages of his website to club activities.
   Address is:  http://homepages.enterprise.net.gdixon.
   Also a reference to Ted Hardy's radio net on 3700kHz +/- 20kHz at 0900 hrs (perhaps sooner?) every Sat a.m.
[8] Alan Short's Mirror Drum.   Notes with constructional sketches.
[9] Graham Lewis on his new software, and quite a bit of it at that.
[9] E.Mail Suggestion  from Grant Dixon.  If you have an e.mail address, would you like to send it in for publication?
[9] Quick 50Hz Filter  by Reg Moores G3GZT.   Diagram of 50Hz Twin-T notch.
[10] Museum Exhibits.  From Larry Robinson (G0LHR) on unseen NBTV treasure in local museum stores.
[10] NBTV Talks  by Con Wassilieff ZL2AFP, Steve ZLTBKA, Dave Buddery G3OEP and Peter Smith G4JNU at various venues.
[11] Raster Generator   by Patrick de Scheemaeker.
[11] Alan Short  is building a large-screen NBTV display using a laser beam and a novel "spiral mirror device".
[12] NBTV U.S.A.  Peter Yanczer reports that at this year's Antique Wireless Association in September the theme is to be "Television".
[12] A Truly Synchronous Motor   by Peter Yanczer.   Smart trick using small induction motors of type used in tape recorders and record players to make them run at exactly synchronous speed.
[12] Photo-News.  Dave Gentle with his mirror-drum flying-spot scanner.
Peter Smith's CRO display of CD images.
Grant Dixon views one of his personal Internet pages.
Don McLean with PC display of recently-recovered 1933 recording. 
Telecine apparatus by Jeremy Jago, offering synchronised sound.
Graham Lewis's computer display of sequential and interlaced images "grabbed" from his camera.

Volume 23 Number 1  1997
[3] High-Speed FM Recording on Cassette Tape   by Des Kostryca MOAYF.  5x normal tape speed is used, enabling a carrier frequency of 20kHz to be used.  Full description and circuitry.
[7] Notes from my "NBTV Ideas" File (12)  by John Franklin.  Continuation of Vol 22/3 article on synchronising, also comments on cone drills and stepped drills.
[9] ADDENDUM  on mirror screws.   Some further tips prompted by Jim Wood.
[10] Mechanical TV - IMPOSSIBLE!  by Jeremy Jago (Official Club Pedant).  Thought provoking.
[10] Obituary  of William (Bill) N. Parker, U.S. engineer and colleague of Sanabria.
[10] Peter Yanczer  reports that the TV presentations at this year's AWA Conference at Rochester NY were a great success.  Much equipment shown, Malcolm Baird and family special guests.
[10] Recommended Book.  "TV is King" by Michael Bennett-Levy.
[11] East Midlands Meeting scheduled for Sunday October 9th at 2pm.
[11] BBC 75th Anniversary Celebrations includes program "Seeing by Wireless".
[11] South-East Area Meeting  scheduled for Sunday 19th October at 12 (noon).
[11] Plastic Mirrors (WARNING).  Do NOT use UHU or other organic solvent glue to stick these mirrors as it damages them.
[11] Tape recorder Hint.  Alan Short points out that some tape recorders act as an inpromptu audio amplifier if you put in a tape and press "Record" and "Pause" at the same time.
[11] International Broadcasting Convention (IBC) Show.  Report.
[11] Valves wanted  by Peter Yanczer for 1938 German DKE38.  Valves are "VCL11" and "VYZ" or possibly "CYZ".
[12] The National Vintage Communications Fair  Sunday 26th October 1997.  Announcement.
[12] E-Mail Addresses of members
[12] Photo-News.   Doug Pitt, Pete Smith and Don McLean at the 1997 Convention.
Grant Dixon at the IBC Show in Amsterdam, manning the NBTV stand.
Print-out of "snatched" picture of Jim Wood from Graham Lewis's camera at the 1997 Convention.
Motors with synchronising cog-wheels, but see ADDENDUM on p12 Vol 23/2.
Two views of Peter Yanczer's 120-line disc camera with PMT.

Volume 23 Number 2
[3] Oscilloscope NBTV Drive Unit   by Grant Dixon G8CGK.  Comprehensive unit with sync separation, LF phase correction, timebases scanning in the correct direction and amplified video output of either polarity.
   ERRATA.  In the circuit diagram all three of the emitter-follower inputs, and unijunction emitters, should have been connected to the COLLECTOR of the respective constant-current transistor and NOT to its emitter.
[5] Magnetic Timebase  by Peter Yanczer.   Timebase using 555 and TDA2030 i.c.s to drive low-Z scan coils.
[6] Nipkow Discs by Numbers  by Joe Bubez.   Using a CAD program to draw an accurate disc template.
[7] Disc Conventions  by Les Rowbotham.   Make sure you are going in the same direction at the same time as everyone else!
[7] The G-QRP Club.  Advertisement.
[8] Con Wassieleff.  This is correspondence between Con and Doug Pitt about the possibility of transmitting NBTV  via a single-sideband transmitter.  This work includes shifting the video frequency by means of a sub-carrier in an attempt to get more resolution.   Quite apart from the bandwidth problem, the extremely high-Q poles of the SSB filter will cause serious phase distortion - an anathema to video.
[9] NBTV East Midlands  and South-East Meetings.   Reports.
[9] BBC Documentary.  Listeners' comments on "Seeing By Wireless".
[10] Flying-Spot NBTV   by Doug Pitt.  description of operation plus some historical anecdotes of its use.
[12] An Unusual Source of Hum.   Jeremy Jago's experience with widespread interference from a fluorescent bulb.
[12] Hastings Lecture.   Report on Ralph Barrett's Baird lecture at the White Rock Pavilion.
[12] ADDENDUM  Part of Peter Yanczer's caption in Photo-News Vol 22/1 was omitted.  Correction given in mag
[12] Photo-News.  Doug Pitt harangues a captive audience at the British Association festival in Leeds.
House in Hastings where Baird produced his first images in 1923.
Plaque at 21 Linton Crescent, Hastings.
Imposing equipment (mostly Pete Smith's) at the BAAS Lecture.
Image of Felix the cat on Peter Yanczer's 120-line mirror-screw,  exhibited at this year's AWA Meeting in the U.S.
Bottom right uncaptioned = D. Gentle demos light deflection from vibrating mirror
Volume 23 Number 3
[3] Mechanical Domestic Colour TV.   Further information on the new I.C. described in Vol 21/1.
[3] NBTV LF Tape Equalisation   by Graham Lewis.  Comprehensive amplitude and phase corrector with description and diagrams.
[5] ERRATA.  In Grant Dixon' s  NBTV Oscilloscope drive unit in the last issue ALL three of the emitter-follower inputs, and unijunction emitters, should have been connected to the COLLECTOR of the respective constant-current transistor and NOT to its emitter.
[6] Annual NBTV Convention 1998.   Report.
[7] White Bar Generator  by Alan Short, with sketch.
[8] A reflective Opto-switch   by Jeremy Jago.  DIY opto-reflective sensor, with circuit.
[8] Graham Nutt  reports on his growing array of NBTV equipment.
[8] RADIOACTIVE  LENSES - WARNING FROM Des Kostryca.
[9] Your Opinion.  Results of reader survey by Doug Pitt.
[0] Ralph Barrett - - Talk.   Ray Herbert informs that Ralph will be giving a Baird talk in Croydon.
[9] White LEDs.   This is an illuminated-phosphor device offering high brightness at 20mA and apparently fast enough for NBTV displays.  Two suppliers given - not cheap yet, but very good.
[9] Fire Wheel Hint  by Doug Pitt.  Tips for display described in Vol 21/1.
[10] Frits Ogg PA2LIA has volunteered to act as as organiser of the Dutch NBTV section, suceeding Bob Mejier.
[10] Colour Filter Tip  from Steve Ostler.  He has found that the colour is actually on the surface, not right through, and that his particular filters can be cleared on one side with cellulose thinners to reduce density.
[10] Grant Dixon  has a new Internet location:-  homepages.wyenet.co.uk/gdixon.    also BATC  location is:-   http://www.batc.org.uk
[10] More Gramovision  Jon Weller COGNA (is it G0GNA?) acquired  some 30-line disc recordings, which have been sent to Don McLean for expert attention.
[11] Book Review.   "Television: An International History of the Formative Years" well reviewed by Ray Herbert.
[12] Dutch Language Anouncement  with Frits Ogg's address and phone number.   (new organiser).
[12] Photo-News (and a bit of photo-history).   Photo from October South-East meeting with drum apparatus and two disc devices.
Two discs recently built by Peter Yanczer for experiments to reproduce Baird's 1928 colour demo.
Photo from Adelaide of Top Band transmission  (with multi-path distortion) of 20/9/80 from Melbourne.
Alan Short shows the white bar generating mechanism described elsewhere in this issue.
Jeremy Jago's photo of slide scanner using a projector in reverse, incorporating one of his home-cast lenses.
Battered televisor discovered and photographed at Derby Museum by Doug Pitt in 1976.

Volume 23 Number 4
[3] FM Subcarrier Recording   by Des Kostryca.   Use of FM sub-carrier to carry line sync information, with block diagram and description.
[5] 1998 NBTV Convention and Conference.  Reports.
[6] Polishing Metal  by Dave Buddery G3OEP.  Practical tips from an expert.
[7] Con Wassilieff Writes from Wellington (N.Z.)  about his work on NBTV transmission by radio and mentions his receiving program for a PC soundcard,  written for 24 lines.
[8] Notes from my "NBTV Ideas" File (13)  by John Franklin.   Continuing last edition with the saw drill and tile/glass drill.  Also he's bought a mini-disc recorder - NBTV perhaps?
[9] It's Good to be Seen Talking  by Dave Gentle.   Dave's experiments with NBTV by telephone.
[10] 3-Colour Discs   by Doug Pitt, who reports that Peter Yanczer is hoping to give a frame-sequential colour demo at the AWA Meeting in the U.S.A.
[10] 1998 BATC Rally.   Report on NBTV stand.
[10] Fire-Wheel.  Drawings of Patrick de Scheemaeker's latest project, recently completed.
[11] Jim Wood sends design for a simple strip puncher for use in the making of aperture drums (with sketches).
[12] J.L.Baird - Local Hero.   BBC are to do a Baird program in their "Local Hero" series.
[12] Photo-News.  Peter Yanczer's colour monitor giving three 15-line rasters per rev and his flying-spot apparatus.
Chris Lewis and Doug Pitt examine Jim Wood's strip punching device at 1998 Convention    (see this issue).
Con Wassilieff's images, after 800-mile round trip, with some software reprocessing.
Peter Smith shown in ultra-high and low-definition via Jeremy Jago's all-electronic CCTV at 1998 Convention.
Graham Nutt's hand-made valve apparatus at the 1998 Convention.
[12] Late News.   There will be an exhibition of historic BBC radio material at the IEE premises, Savoy Hall from 5th August to 25th September.

Volume 24 Number 1  1998
[3] Front Cover  shows D.R. Campbell in control of the steerable mirror-drum flying-spot projector installed at Broadcasting House for the first BBC 30-line TV programmes.
[3] The Club Kit - a Statement  by Les Robotham.  Report on progress of the kit, with circuits, some mechanical details and parts list.
[5] Two Useful Circuits  by Graham Lewis.  A circuit for a head-amp for the club's 10mm domed "teddy bear's eye" cell is shown, with the special feature of a secondary, hum-cancelling sensor.   An aperture corrector by Graham is shown and also an old BBC one, with values.  A  references is also given to a "Radio and Electronic Engineer" article.
[7] Digital Recording of NBTV Signals  by Klaas Robers PA0KLS.  A lengthy article with some information about tape peculiarities rarely discussed and various methods of recording, including CD.   Many useful references are given to NBTV mag articles..
[9] "Local Heroes"  BBC2 series returns on mon Sept 7th at 8pm for new series.  "Television"  (Baird)  is likely to be covered in the first or last (Oct 26th) programme, depending on whether Baird is linked with Hastings or Glasgow.
[9] Magnetic Deflection CRT Displays  by Jeremy Jago.   Complete circuit of NBTV monitor.  All-semiconductor circuit except hefty 6V6 valve spot-wobble unit.
[11] NBTV Pattern Generator Mk 2  by Grant Dixon G8CGK.  Pattern generator based on 32kB EPROM.  Description and full circuit are given.
[12] Synchronous motors - A New Source? by Jeremy Jago.  Descriptions of two appliance motors.
[12] Photo-News.  Views of P. de Scheemaeker's "fire-wheel" display device.  (see diagram in last issue).
Front view of Graham Nutt's disc monitor at the 1998 Convention.
1998 Convention photo.  Peter Smith's mirror-screw as demonstrated.
Picture fro Klaas Rober's recordable CD (see article in this issue).  Image displayed on large CRT.
Photo and photo of K.R.s call-sign by Jeremy Jago.   Self-portrait from K.R.'s disc.
    
Volume 24 Number 2
[3] For Your Diary.   NBTV Annual Convention provisionally fixed for Sat. 17th Aprill 1999.
[3] South-East and East Midlands Local Meetings.  Reports.
[4] Invisible Lines   by Klaas Robers PA0KLS.  Results from Klaas' 32-line to 625-line converter, showing the remarkable smoothing of edges in digitised images.
[6] Right-Hand Standard.   Appeal for standardisation on right-handed optics on all cameras and monitors.
[6] CD Recording Machines  Appeal for help for Convention recording.
[6] New Web Link.  There is a new link established between the Club's website and that of  the BBC program "Local Heroes",  www.bbc.co.uk/education.
[7] Camera Lens Focus Unit by Les Rowbotham.  Cheaper plastic replacement for metal lens system in original Club camera.
[8] J.L.Baird - Local Hero.  The last BBC "Local Heroes" program on 26th Oct featured the Glasgow region and J.L.Baird.   Doug Pitt was consultant for this episode.
[8] The Compact Disc as Video Source   by Peter Smith G4JNU.   Peter reviews a number of CD players to find one most suitable for NBTV and shows circuits for crystal-locked 375Hz and 400Hz sources.
[9] Phototransistor  By Doug Pitt.   In Vol 23/3 Jeremy Jago described a reflective opto-switch using the Siemens SFH309,  Maplin cat. No. CY36, which was described as "linear" and with a spectral response suitable for colour experiments.   Checks with white light through a prism bear this out.
[9] Recommended WHITE LED.   Stan Kujawinski recently bought a white LED from Rapid Electronics and is very impressed.   Item 55-1542, price £2.20, maker's No. 
   NSPW510BS.  Imax 30mA,  1100mcd at 20mA!      read note for more data.
[10] Recommended A.T.U.   Aerial tuning (matching) unit recommended by Dave Buddery G3OEP to help receive NBTV on 3700kHz..
[10] Opto-switches  by Doug Pitt.   These items are no longer available at half-price, but IR pairs  (both DIODES) are, and must be combined with a transistor to get good output.   Sketch enclosed to show circuit.
[10] Recommended Article   "In Practice" in November 1998 "RadCom"  by Ian White G3SEK.   Deals with lead acid batteries, specifically "Yuasa", with useful characteristic tables.
[10] Precision Disc.   Agreement at 1998 Convention to investgate price of precision Nipkow disc.  One-off prohibitive, but large number attractive.   More information when available.
[11] Novel Display Devices.   Patrick de Scheemaeker (Belgium) has discovered a new I.C., the U1096B, which will drive 30 LEDs sequentially.
[11] Who to Write to.   Various Club officers and helpers, with addresses, phone numbers etc.
[12] AWA NBTV Demo   by Peter Yanczer (Missouri).  Full description of NBTV event.
[12] Photo-News.   Domestic scene simulated at Polsden Lacey in August 1998.
Televisor fed from Pete Smith's 30-line images CD.
Mirror screw apparatus by Joseph Brami (France) and patented in 1932.
1932 Televisor, built by Noel Button G3BG.  Plastic lens assembly by Les Rowbotham (see this issue's article).
Colour transmitter and receiver shown by Peter Yanczer at this year's AWA (U.S.A.)
Mirror drum by Ron Lucking, with ingenious variable-speed friction drive on left.
Mirror screw by Dave Gentle G4RVL, with two earlier models in background.
Image on Dave's mirror screw from CD by Klaas Rober's PA0KLS.
  
Volume 24 Number 3
[3] Front Cover Title   has been re-worked by Klaas Robers of Netherlands.
[3] ERRATA  On page 10 of the last issue the 100R resistor on the IR LED  should be changed to 560R to limit I led to 20mA at 12v - choose value to suit supply voltage.   On page 12  image was produced from Dave Gentle's disc camera, not a CD.
[3] Photomultiplier.   Bull Electrical are offering brand-new PMTs for £21.74 each inc UK post and VAT.
[3] NBTV Talk   Don McLean gives talk "Restoring Baird's Image" at IEE HQ.
[4] A Quick Flying-spot  by Jeremy Jago.   Use of old Aldis projector with Nipkow disc to improvise flying-spot scanner.
[4] Berlin NBTV Demonstration  by Mike Wade G8OGO after ICARE meeting.
[5] Annual NBTV Convention.   Notice.
[6] Convention Auction.   If you have any piece of unused gear, please bring it to the convention for auction to the Club's benefit.  
[6] I Was There   by Noel Button G3BG.  Anecdotes from a very long life in radio and television by a pioneer.
[7] Quote - Unquote.   Comment on NBTV from editor of "International Broadcast Engineer".
[7] Graham Lewis reports he has built his first mechanical camera and it "worked first go" -  amazing!
    He has also built a 32-line to 624-line non-interlaced converter.
[7] NBTV Tape Timebase   by Graham Lewis.   Elegant circuit takes stripped syncs and outputs line and frame scans and spot-wobble
[9] Transverse Velocity Modulation  by Doug Pitt.  Not the usual brightness-modulation system
[10] Joseph Brami.   An account by Doug Pitt.  This article is mostly about work done by Brami on the mirror-screw.
[10] Con Wassilieff VHS Video.   If you are interested in seeing the video, please write in.
[11] The Cossor System.   Note on the Cossor system of missing pulse frame sync.
[11] Des Kostryca  has sent information on the amateur radio bands he can transmit and/or receive on.
[11] NBTV Internet Club.   Steve Ostler has set up an "NBTV Club" website under Grant Dixon's management.  Access via   http://clubs.yahoo.com/clubs/nbtv
[12] 1932 Testcard.   Grant Dixon has found a 1932-35 LDTV testcard of the BBC on a website of the "Test Card Circle" club.   
[12] "Early Television"  reviewed by Doug Pitt.   A mighty 600-page reference Doug was able to read thanks to Jim Wood.   There is much more in the review.
[12] News just arrived of death of Bob Meijer.   Obituary in next Newsletter.
[12] Photo-News.  Peter Yanczer's mirror-screw blanks ready for polishing and his mirror-grinding machine, with picture of reflection of "Felix" from polished block of strips.
Three German radio amateurs (L to R) Siegfried Schrieber DL7USC,   Ingo Goltz DL1BLV and Seighard Scheffczyk  DL7USR  (see notes elsewhere).
Televisor constructed by Noel Button in 1934.
Peter Smith's outdoor display at Polesden Lacey last August.

Volume 24 Number 4
[3] Obituary for A (Bob) Mejier  1/7/13 - 26/2/99  by Doug Pitt.
[3] Old Circuit - New Look   by Keith Vickers.  Update of Patrick de Scheemaeker's solar cell amplifier to reduce excessive gain, flatten frequency response and provide better sensor-to-amplifier noise figure match.   N.B.  Set R1 to bias the output stage at (Vcc/2) - 0.5v for best linearity.    ERRATA.  Due to my poor drawings and notes, there are two mistakes.    (1) The RF suppression capacitor Cx should be from the BASE of the first transistor to ground.    Rx and Cx are needed only if you experience RF break-in and reduction of Cx MAY give a little more resolution at lower light levels, due to HF shunting effect on increased solar cell resistance.
    (2) 4.7nF capacitor is removed from the second stage and connected across the collector  load of the first stage.    Grovelling apologies - Keith V.
[5] E-Mail.   Any reader who wishes to have their e-mail address published,  please send it in.
[5] 1999 Convention.   Report.
[7] Notes from my "NBTV Ideas" File (14)  by John Franklin.   Using domestic VCR sound channel for NBTV video.
   Also notes on the eddy-current brake for speed regulation.
[8] "Universal"  Motor Drive Circuit   by Peter Smith G4JNU.   Versatile circuit. copes with missing syncs.
[10] Cassette NBTV - A Further Approach   by Jeremy Jago.  Pulse stretch onto "soft" tape overload region for better pulse recovery.  Circuit included.
[12] Front Silvered Plastic.   Club now has a stock of this material.
[12] Photo-News.   Peter Smith adjusts his full-size televisor at the 1999 Convention.
Sam Palmer with his elegant circular camera-monitor based on the "framed disc" principle.
Dave Gentle's back-projection flying-spot display using a 6000 mcd LED.
Klaas Robers and Dave Gentle with the line-hiding apparatus shown in Vol 24/2.
Grant Dixon's  "first" disc monitor showing images stored on EPROM.
Jeremy Jago shows a self-portrait to demonstrate his cassette recording technique (circuit details in this issue).

Volume 25 Number 1  1999
[3] Front Cover Picture   Harold Bailey G2UF in his amateur TV station in 1934.
[3] Local Meetings  Notice of  coming East Midlands and South east local meetings.
[3] News from New Zealand   by Con Wassilieff.    Experiments in halving NBTV bandwidth for radio transmission.
[3] TV Article    by Ray Herbert on BBC 70th anniversary in October 1999 issue of "Practical Wireless".
[4] Baird's Relay Synchroniser   by Garth Porter G8HFX.  
[5] Precision Discs    All sold out.  Reports wanted on performance to aid decision on further orders.
[5] NBTV Test Signal and Live Video CD No. 1   Joint effort edited by Klaas Robers.
[5] NBTV on CD    another CD  made at 1999 NBTV Convention.
[5] Shuttleworth 1999    BATC special meeting at Shuttleworth College.
[6] Optical Forks and Motor Control   by Grant Dixon.  Control of motor via 4046 CMOS PLL and power MOSFET.
[7] Joe Bubez  reports his work on high-voltage switching regulators, plus other ongoing and proposed projects.
[8] Mirror-Screw Experiments  by Alan Short.   Experiences and sketches of Alan's experiments.
[8] ERRATA   drafting error on mods to Scheemaeker video pre-amp.  Also see appended errata in previous ref.
[9] Help Wanted  on unknown quartz crystal.
[9] "Tube".   A reader's letter to "405 Alive" mentions this book is being remaindered for only £6 per copy.   Verdict very so-so, but not bad for six quid.
[9] NBTV Recordings Lecture.  by Don McLean at IEE HQ on "Restoring Baird's Image".
[9] Steve Ostler hopes to be able to display images in colour and 3D by next year's Convention.
[10] J. Brami Lives!   Attempt to make Bramis's device work -sort of.  With description and circuits
[10] American 30-Line Disc.   Account from Peter Yanczer of mystery TV device.
[12] Photo-News.  Portrait of Mrs Campbell taken from the screen, probably in 1928.
Home-built televisor by the late E.M.Handcocks G5HN as recently restored by Pete Smith.
Picture of the rare Grafton "Ethovisor" TV receiver (1934).
Image generator (left) and test-bed (right) as built by Bruno Ruiz and helpers to get pictures from the "Visiola".
Grant Dixon's mechanical monitor, demod at April 1999 convention.
Patrick de Scheemaeker's amazing pack-away camera-monitor,  with much more description.

Volume 25 Number 2
[3] Annual Subscriptions  Hand-in-pocket time again!
[3] Local Meetings Reports - East Midlands and South-East
[4] A One-Chip test Unit   by Jeremy Jago.  Creates bar pattern composite video with sync - and under a Quid!
[4] NBTV Recordings Lecture   by Don McLean on "Restoring Baird's Image" at IEE's HQ.
[5] Bit-Reduced Digital Recording of NBTV   by Klaas Robers,  PA0KLS.  report of disappointing results with attempted reduced bit-rate recordings of NBTV.
[5] Laurie Booth  G4XEC   Report on good performance on modified Scheemaecker pre-amp.
[6] More Thoughts on Constant-Intensity Display   by Jeremy Jago.  Oddball display modulation schemes.
[6] The G-QRP Club  advert.
[7] Tape Playback Pre-amp   by Keith Vickers.  Noise-matched pre-amp with opposite polarity outputs and variable gain.
[8] Nostalgia Corner.   Baird Televisor baseboard dimensions.
[9] Baird's Lost Letters   Description of 74 letters by J.L.B. found in 1974.
[10] Dot Interlace - Some Thoughts   by Dave Sumner  G3PVH.   Interesting theories on sampling and bandwidth reduction.
[11] Mike Wade G8OGO   Report on activities.
[11] Mystery     What is the valve used in the "Nagard"  TV signal converter using deflectors rather than grids?
    This MAY be a "beam deflection" valve such as the 7360 which was used by (probably) Peter Martinez (G3PLX?)  as a highly-linear RF mixer.   It has conventional pentode structure, but TWO symmetrical anodes, with share of anode current determined by relative voltage on CRT-like deflector plates - believed to be used as balanced mod/demodulator.
[11] NBTV on CD     KLaas Rober's test signal CD.
[11] Steve Ostler   Hints at things to come - maybe colour and 3D!
[11] Motor Control - A Comment   by Peter Smith    ERRATA  for Vol24/4.
[12] ERRATUM    on portrait of Mrs Campbell in last issue.
[12] WANTED    circuit of Aiwa CD Player model DX-M740 or amplifier CX-740K by J.J.
[12] Photo-News   From East Midlands October meeting  
Mirror-drum and mirror-screw by Dave Gentle.
Chris Lewis's disc monitor.
Peter Yanczer's electronic balancing devices. 
Sam Palmer's camera-monitor.        Televisor by T. Geoffrey Willey G2AMM in 1935. 
Commutator as used in Baird disc receivers.

Volume 25 Number 3
[3] Annual NBTV Convention  notice
[4] Surplus Gear .  Appeal for surplus for club sales.
[4] Fault-Finding on Projects   by A.C. Lewis G6ACL    Practical tips.
[5] 625-Line to 30-Line Converter (also 32 lines)   by Peter Smith G4JNU   Complete circuits and description for FSTV-NBTV standard converter.
[9] "High Definition" Television   by Reg Moores G3GZT.    Ideas on increasing NBTV definition.
[10] Notes from my "Ideas" File (15)   by John Franklin.   Frame synchronisation.
[11] This Newsletter   Publication problems and appeal for copy.
[11] Subscription receipts   Notification of normally non-acknowledged subs  unless requested otherwise.
[11] Photodiode Amplifier    Application note for wideband photodiode amplifier with DC restoration.
[12] History Repeats Itself.   Memories of valve use and abuse.
[12] BATC Rally 2000    Notification.
[12] Television Project 2000   Notification.
[12] 25 Years of Sprat   Quarterly mag of G-QRP Club celebrates 25 years.
[12] WANTED    any info on UHF signal generator PYE type SG5U  for Jeremy Jago.
[12] NO Photo-News this issue.

Volume 25 Number 4
[3] NBTV Convention 2000  Report.
[3] Copyright  and contributors' rights
[4] Adjustable Picture Size and Focus for 2-inch Lens   by Les Rowbotham and R. Pedro.  How to make a variable-focus 2-inch lens, with diagrams and description.
[6] Notes from my "NBTV Ides File" (16) by John Franklin.. Achieving even illumination with back-projection.
[7] NBTV Disc Camera  by Graham Lewis.   An electronically very elegant, if complex design with some novel features which gives excellent results.  Circuit diagrams included.
[10] Transistor Substitute.  In Vol 24/1 a PNP silicon alloy junction BCY34 was used as a sync separator, now expensively obsolete!  A 'red-spot' germanium transistor (OC 71 etc) will do the same job.     N.B. Silicon RF transistors tend to have 5v reverse Vbe breakdown, audio types 7v and BFY50 category about 10v.
[10] New Newsletter Index (printed)  for Vol 12/1 to Vol 25/2 is now available - see club sales.
[10] Lee 216 White Diffuser.    Consult Club Sales for sample.
[10] Alternative Gamma correction for LED drive  by Pete Smith G4JNU.    Description and circuit.
[11] Sync Holes - A Caution   by Garth Porter G8HFX.  31 sync pulses are liable to  confuse PLL circuits etc when used with "missing sync" circuit.
[11] Frame Sync with Disc.  Slight trimming of Pete Smith's frame sync circuit to suit  wider range of discs.
[12] Photo-News.  Denis Asseman (Belgium) shows Mike Wade his replica "Telehor" receiver.
Mike Wade G8OGO demos a radio-controlled vehicle with on-board camera.
Ripley Pedro with miniature camera and monitor.
Graham Lewis's disc camera and 32-line to 625-line converter.
Andrew Sturt demos PIC device which produces moving captions.
Dave Gentle shows his novel display device.
Russell Burns receives his prize from Jack Cardiff, veteran film director.
Cogwheels and belts in Steve Ostler's 3D colour apparatus.
Monitor recently  built by Benny Ahlburg (Denmark).
Splendid 32-line disc display by Peter Yanczer.   
Mirror-drum receiver by  M. Handcocks  G5HN in 1934, currently being restored by Pete Smith. 
Self-portrait of Pete Smith via his  625-line  to 32-line converter.
[12] ERRATUM.   In Vol 25/3 p8 the table shows IC 23 as 4520.  This SHOULD be 4528. 
  
Volume 26 Number 1   2000
[3] Book Review.   "Restoring Baird's Image" by Don Mc Lean.    Recovery of NBTV signals from ancient shellac discs.
[4] Celebratory Article.    Coming article by Ray Herbert on Baird's 75th anniversary -  probably September issue.
[4] E-Mail.   Appeal for E.mail addresses for anyone who wishes it to appear in a forthcoming newsletter.
[4] NBTV 'Scope   by Graham Lewis.  Very useful 1" 'scope for portable use or freeing the main 'scope for other purposes. Complete circuits and description.
[7] Edit Program   by Graham Lewis.  NBTV edit program for the PC. You name it, it probably does it.
[7] NBTV Video Neon/LED Driver with Gamma and Clamp   by Klaas Robers PA0KLS.  Modern all-chip circuit with description and pcb layouts.
[10] Motor Drive with Frame Lock   by Pete Smith.   Simple-to-build, yet elegant design giving proper motor control with automatic frame sync.  Needs extra frame pulse hole in disc + IR pair.
[11] Local Meetings. Notice.
[12] Circuit Trick to assist Opto-Alignment.   Idea by Garth Porter G8HFX to help set sync pulse timing.
[12] WARNING  Possible problems with the 625 to 30/32 line converter published in Vol 25/3.   As presently understood in Sept 2001 circuit is o.k., but it may pay to check.
[12] BATC Rally 2000  relocated to new venue further South.
[12] Photo-News.  
Mechanical scanning device with electronic display at the NHK Museum in Japan.
Grant Dixon giving an NBTV display in Indianapolis.
Des Kostryca's 1" NBTV vidicon camera and his 1" CRT monitor.
Replica of TekaDe 30-line receiver under construction by Denis Asserman.
Peter Yanczer's flash-RAM picture generator.

Volume 26 Number 2
[3] Subs Reminder.
[3] Building the P.E. Smith Converter   by Pedro G7H1H.    Practical advice for those hand-wiring Pete Smith's 625-30/32  line scan converter.
[4] Gamma for NBTV   by Klaas Robers PA0KLS.   Gamma and its importance with references to gamma correctors.
[6] Stereoscopic Colour TV from One Nipkow Disc    by Steve Ostler.   Amazing mechanical colour equipment -  website address given for more info.
[7] Sync Separator Improvement   by Pete Smith.   Improvements to get good performance from club CD.
[7] Dave Buddery G3OEP   continues to transmit short NBTV, plus other radio news.
[7] Data Sheets Available   for LBO-9C 'scope at 1999 NBTV Convention.
[8] Embarras De Richesse - OOPS!  Too many diagrams per article published!
[8] Book Review  "The Inventor of Stereo"  (Life and works of Alan Blumlein) by R.C. Alexander.
[8] The G-QRP Club (advert).
[9] Oscilloscope Ifs and Buts  by Jeremy Jago.   Amplitude-modulated spot-wobble gives different display, with circuits.
[10] Book Review   "Visions: The Life and Legacy of J.L. Baird"    reviewed by J.J.
[11] East Midlands local meeting.   Notice.
[11] South-East local meeting.  Notice.
[11] New J.L.B. Book    Prof. Russell Burns' latest book.
[11] Obituary for Ron Lucking G0NIB.
[11] Obituary for Ladislav Vig.
[12] Disc Scanner   by Laurie Booth.   Description + pictures.
[12] Baird Corner.   Items from the latest "Baird TV Newsletter"
[12] Photo-News.   Andy Parker and Doug Pitt inspect battered Baird televisor (not-guilty plea entered!).
Professor Russell Burns at NBTV Convention 2000. 
Garth Porter demos to crowd at BATC 2000 rally.
 
Volume 26 Number 3
[3] Sussex Talk.   Pete Smith is scheduled to give a talk on NBTV at the local IEE branch on Tues 20 March.
[3] NBTV Sync Seperator and Video Pre-amplifier   by Klaas Robers PA0KLS.  Neat circuit delivers sync and frame and line clamp pulses.  With circuit, description and pcb layout.
[4] BATC Rally  on Sunday 6th May at Bletchley Park.
[5] New Picture Book.   Kelly Publications  have released a volume of 72 formerly held at the Plessey Company Headquarters.  Of particular interest to NBTVers and Baird enthusiasts.
[5] ERRATUM  The title of the article by Laurie Booth in Vol 26/2 p12 should have been DRUM Scanner.
[5] 30/32 Line CRO Driver   by Peter Smith G4JNE.  Accepts standard 1v video and gives sync, frame and line sawtooth outputs, but NOT high-level video for CRT grid.
[7] Annual NBTV Convention 2001.   Saturday 28th April 2001 at Loughborough University.
[8] Logarithmic Grey Scales and a Proposed Generator  by Garth Porter G8HFX.  Some thought-provoking comments and figures which show that what our 'scope sees and what we see are entirely different.
[9] Second NBTVA CD.  Recorded at Convention 2000, there are no test signals on this CD.   It features real-time NBTV coverage in 32-line and 30-line format.
[9] Direct-Coupled Amplifier.   Jim Hawes of Illinois has sent this experimental circuit - NB diagram errors.
[9] Printed-Circuit Board  for Peter Smith's 625-30/32 line converter (Vol 25/3) is to be marketed by the BATC.
   Supplies are limited and only available to paid-up members of BATC or NBTVA   Price £21 + 43p U.K. postage.
[10] Book Review  John Logie Baird, Television Pioneer , price £55.
[10] Daylight Viewing Camera Pre-amp   by Ripley Pedro G7HIH.
[11] Congratulations for Club Website, designed by Grant Dixon.
[11] New QRP Radio Rally planned for Sat 17th March by South Normanton,  Alfreton & District Amateur Radio Club.
[11] Threat to Alexandra Palace?   Possible opportunity for asset sell-off by trustees.
[11] "75 Years of Television"  Report by Ray Herbert on various Baird-related events.
[11] Baird Corner.  Consumer Electronics Association od U.S.A.  added Baird's name to their "Hall of Fame".
[12]  Simple Monitor Circuit  by Michael Robertson.  Shows simple cogwheel-sync disc monitor circuit.
[12] Photo-News  (Discs, discs and more discs) 
Contemporary photo of "Viro" 30s receiver.
Michael Robinson's display detailed on p12.
Two Nipkow discs by Peter Yanczer with 32 and 60 holes.
Parts of Patrick de Scheemaeker's  fibre-optic drum a la Roy Prescott, with mods.
Almost-completed drum held firmly with clothes pegs.

Volume 26 Number 4
[3] Apology for late appearance of newsletter.
[3] A Strange Elegance  by Jeremy Jago.  Circuit description and historical references for the Miller Transitron timebase generator.
[4] Simple NBTV Video and Sync Circuit  by Jim Wood (California).  Inexpensive circuit using a few transistors and a hex-inverter i.c. to convert 1v video into separated line and frame syncs and incorporating frame lock indicator.
[5] Annual Subs reminder.
[5] Newsletter Contributions  Appeal for copy.
[6] Using a PC to Record NBTV Pix  by Graham Lewis.  Comprehensive article with description and circuits for Windows 95 NBTV display.
[9] Our Front Cover.  Descriptions of changes over the years to the front cover.
[9] Our President.  Thanks to Professor Burns for 3 years service and news of his successor Ralph Barrett.
[9] Late News  of IEE's recomendation of special award to Russell Burns for his Blumlein biography
[9] American Club  Peter Yanczer of Missouri has started his own US-based called the "Experimental Television Society".
[9] Recommended Firm  Details of W. Hobby Ltd, source of hard-to-get model engineering parts which are useful for mechanical TV.
[10] 2001 Convention  Report.
[10] Progress with 24-line TV  by Con Wassilieff.  Some interesting information on difficulties of radio transmission and use of PC in flicker-reduction plus bandwidth reduction.
[10] Two Useful Circuits  By Patrick de Scheemaeker (Belgium)  for (misdrawn?) video mixer and composite-video buffer.
[10] Photo-News.  Ralph Barrett, incoming president.
Mirror drum by Peter Yanczer.
Retiring president Russell Burns with Denis Asseman from Belgium.
View of part of Club's display stand at this year's Bletchley Park BATC Rally.
Novel attache-case TV built by Patrick de Scheemaeker with horizontal disc.
Image of Edward Nowill after Con Wassilieff's computer processing (article this issue).

Volume 27 Number 1   2001
[3] Our Front Cover.  Twin-mirror polygon camera by Alan Short.
[3] Notes from my "NBTV Ideas File" (17 - part 1)  by John Franklin.  John's response to Doug Pitt's comments in his article about Joseph Brami ant the subject is mirror-screws.   Practicalities including some diagrams on lenses.
[4]  Short Film.  In 1990 a series of short films appeared on Channel 4.  This one features J.L. Baird.
[4] Glasgow Exhibit.  28-line disc camera and receiver in the Science Mall.
[5] Creating a Spiral  by Laurie Booth G4XEC.  Practical information and diagram to draw a smooth spiral.
[5] E-Mail Addresses.  Please phone in if you would like your E.mail address published.
[5] Playing with Sound and Light  by Rodney Seymour G1TNE.  Experiments with the reception of sound modulated onto various light sources.
[7] Experiences of an Early Experimenter  by Grant Dixon.  Youthful endeavours.
[7] NBTV on the Web.  Eight sites of interest to NBTVA members.  Please inform Grant Dixon if you know of any others.
[8] News Item: 2TV.  The first Television Transmitting Station  from R H June 2001.  Historical news of Baird's TV station 1926-1939.
[8] Don McLean Speaks.  Disc-restoration talk at various venues.
[8] P.S. to above item from Patrick de Scheemaeker on his discovery of website www.vinylvideo.com - (extremely) late version of J.L.B's products!
[8] Steve McVoy (Ohio)  has recently acquired a 30-line mechanical televisor and has written a computer program (with accompanying hardware) to produce NBTV from a standard camcorder.  E-mail smcvoyc@columbus.rr.com
[9] Large NBTV Neon Bulb  by Michael Robertson.  Modified decorative "flicker lamp" for relatively cheap neon display, with driver circuit.
[10] Easy HT Supply  by Jeremy Jago.  130v DC from 24v AC using ex-tv set multi-section electrolytics.
[10] ERRATA.  Corrections to Patrick de Scheemaeker's Video mixer in last issue.
[10] Ted Hardy  has completed the modifications to the "translator" unit available at the last two NBTV Conventions.  His specimen actually tunes 70cm without the negative bias, so try yours first.
[11] Missouri Meeting.  Report on the first meeting of the US-based Experimental Television Society.
[11] British Vintage Wireless Society Meeting.  Report.
[11] Photographs wanted for NBTV mag, with instructions on prints (not negatives).
[11] Derby NBTV Demonstration.  Peter Smith supported by Garth Porter, Andy Parker, Doug Pitt and amateur radio operation by Fred Ward.
[11] Local meetings  for Sunday October 14th, with contact phone numbers.
[11] WANTED  by Doug Pitt.  Info on source of truly circular 8 ohm FIVE inch loudspeaker (i.e. no fastening holes or lugs).
[11] Help Sought  by Chris Lewis G6ACC to convert sketches into neat computer-drawn versions using a computer CAD program  - 01509-829806.
[11] Jim Wood (California)  is currently completing a 16-inch bead-disc monitor, using circuitry published in last issue.
[12] A Simple Inductance Adaptor  by Reg Moore G3GZT.  Uses 74HC312 and 7805 I.C.s plus a few parts to make useful D.M.M. inductance adaptor.  Footnote:  The inductance indicated may fall sharply when DC is applied to the inductor.  A known-value capacitor can be used to resonate the inductor, measure the frequency with 'scope and oscillator and calculate the inductance, but isn't as convenient as above method.
[12] Photo-News.  John Narborough at the IEE (Sussex) meeting on 20th March at Sussex University where Pete Smith gave an "impressive" demo of NBTV.
Fine example of Daily Express television kit in background (not current offer) ;-)
Colin Hopper (surname mistyped) with his remarkable laser-scanning display at 2001 Convention.
Cast metal frame for a mirror drum, designed by Peter Yanczer.
"Stooky Bill" "still" from a short film by David Hall (see p4 this issue).
Three "old timers" confer at the 2001 Convention - Les G8KLH, Ted G3GMZ, Dave G3OEP.
Optical apparatus for setting-up the "blades" of a mirror-screw, buillt by Peter Yanczer.

Volume 27 Number 2
[3] Our Front Cover.  Experimental set-up as used by Steve Ostler for testing Mihaly and Mihaly-Traub monitors.
[3] Annual Subscription.   Reminder.
[3] Twenty-seven Years On  by Doug Pitt.  Club history.
[4] Early Days   by Reg Moores G3GZT.  Reg's early Baird TV experiments.
[4] NBTV Booklet.  Chris Lewis G8ACC is to co-ordinate the contributions to an introductory booklet for newcomers.
[4] Literary Award.  Prof Russell Burns has received an award for his Life and Times of A. D. Blumlein.
[5] Sag in NBTV Signals   By Klaas Robers PA0KLS.  Effects of LF "sag" and suggestions for LF response for good pictures.
[6] Notes from my "NBTV Ideas File" (17 - part 2)  by John Franklin.   Mirror screws article with reference to "Mirror Screws (Addendum)" Vol 23/1. With diagrams.
[7] South-East and East Midlands Local meetings.   Reports, demos.
[7] Subs Renewal Form + notes for Australian Members.
[8] Disc Monitor tester.   by Jim Hawes.  Test circuit with LED which can be connected to various points to give faulty/OK indications.
[8] The G-QRP Club.   Advertisement.
[9] Concepts and Calculations   By Doug Pitt.  The Whats and whys of those scanning standards we all seem to get wrong!
[10] Lighting Unit for NBTV.   Info on handy powerful single/twin lamp units for frying NBTV victims, er, subjects.
[11] NBTV Sawtooth Test Generator   By Graham Lewis.   Precise test sawtooth with sync pulses.
[11] NBTVA Membership.  Note from Dave Gentle on our membership, which is bucking the trend and actually increasing slightly.
[12] Japanese NBTV.  Report by Peter Yanczer on demo at Kyushu Institute of Technology.
[12] Benelux Meeting.   News on meeting of Dutch and Belgian NBTVers.
[12] Darvic.  Notice of inevitable cost increase, but still excellent value.
[12] Photo-News.   CCTV NBTV system at Derby Radio Exhibition with Pete Smith's standars convertor.
Shell of Baird Televisor replica by Andy Parker G0KKO at Derby Radio Exhibition, Derby Industrial Museum 15th Sept 2001.
2001 Convention stuff:-   Jeff Myers inspects aperture-drum camera by late Deryck Aldridge and old mirror-drum camera by Stan Kujawinski.
Garth Porter G8HFX interviewed by Klaas Robers with Chris Lewis on camcorder.
Graham Lewis shows Ron Rowe Dual computer display with differing digital processes.
Klaas Robers addresses members of the "Gamma Appreciation Society"!

Volume 27 Number 3
   Front Cover. Experimental set-up as used by Steve Ostler for testing Mihaly and Mihaly-Traub monitors.
[3] Annual NBTV Convention notice for Saturday, 13th April 2002, with access map and contact numbers etc.
[4] Twenty-Seven Years On (conclusion).  The progress and innovations of NBTV over the years.
[5] 75th Anniversary of the First Transatlantic Television Transmission  by Ted Hardy G3GMZ.  Details of original and proposal for anniversary transmission, plus details of NBTV radio net.
[6] Transatlantic TV in 1928.  75th Anniversary  by Ray Herbert.  Details of original transmission.
[6] Drilling Drums  by Les Rowbotham G8KLH.  Warning on drum-drilling errors and how to avoid them.
[6] Literary Award.  Kraszna Krausz award goes to Don McLean for "Restoring Baird's Image".
[7] Club Subscriptions.  Reminder.
[7] Using a PC to Record NBTV Pics from a 625-line Source  by Graham Lewis.  Complex but very elegant hardware + software combination grabs 625-line signals, converts to NBTV standard and records them.  Article gives complete circuits and describes Windows software.
[10] HF Detector for NBTV  by Peter Smith G4JNU.  Add-on detector to give improved demodulation of NBTV signals from radio receiver.  Description and circuit.
[10] Video Modulator  by Peter Smith G4JNU.  Gives a DC-coupled, negative-going signal suitable for CRT use (and possibly grid-modulating your old valve TX?).  Description +  circuit.
[12] Copyright.  Copyright claim on behalf of contributors.
[12] Cleethorpes Lecture.  Lecture by Ralph Barrett on "The Titanic and the Radio SOS"  13th March at Winter Gardens.
[12] Translator units.  Free ex-Rediffusion TV "Translator" (TV tuner + extra bits) units FREE!  Units + details for conversion to 70cm amateur band.  Availability, who and where from, contact numbers etc.
[12] Benelux Meeting.  Description of meeting in Budel on 17th February 2002.
[12} Photo-News  1  Kenji Tachibana demonstrates NBTV at the Kyushu Institute of Technology.
2   60-line Nipkow disc receiver by Roger Dupouy.
3   Never too young!  Gary Rhodes G2ADN has recently joined the club.
4   Les Rowbotham drills a drum (see article on p6). 
5   Doug P., Jeremy J. and Garth P. grieve over a sick CRO (trouble with me tubes, doctor?)
6   Denis Asseman's Baird Televisor replica (cover still under construction). 
7-12 Budel meeting.  7 Camera-monitor by PA0MJS.
8   Peter Spies, meeting convenor.
9   Bastiaan Edelman and Grant Dixon.
10   Max Schouten and Jo Ruffini.
11 Erwin Meyvaert and Frits Ogg.
12   Kees v.d. Hoof and Denis Assemen.

Volume 27 Number 4
[3] Our Front Cover.  Inside Stan Kujawinski's mirror-drum camera (ca. 1978).  Description.
[3] Lasers for NBTV  by Colin Hopper.  Use of laser and mirrors for large picture.  Use of white laser and opto-acoustic modulators, also water cooling.( ! )
[5] NBTV Transmission Experiments  by Vic Brown G3SDQ.  Discussion of problems and transmitter and receiver circuits with descriptions.
[7[ Simple LED Driver Circuit  by Klaas Robers  Description and circuit of simple series/parallel LED driver circuit with 3 transistors and DC restoration.
[8] NBTV Convention 2002.  Informative report.
[9] Notes from my "NBTV Ideas File" (18)  by John Franklin.  Notes on "Phantom" circuits to give extra transmission paths.
[10] Kill or Cure - Again  by Jeremy Jago.  Work-around (i.e. bodge!) for faulty mains transformer in oscilloscope.
[11] Edinburgh TV Exhibition.  Notice of forthcoming exhibition.  Dates and contact number.
[11] Opal's Mirror-Flex.  Supply source of these mirrors.
[11] New Club CD.  Number 3, shot at Convention 2001.  Available from club sales £5 inc. postage.  CD 1 and CD 2 still available.
[11] WANTED  by Denise Asseman.  Appeal for brown bakelite bayonet batten lampholders.
[11] NBTV Computer Program.  Gary Millard of Australia has produced a program to display NBTV signals on a computer screen.  Floppy disk from club sales for £1.50 inc. postage.
[11] BATC Show.  This year's show is later than usual at Shuttleworth College NOT Bletchley Park.
[12] Newsletter - New Look   Change to Arial font.
[12] Ralph . . . F.I.E.E.
[12] Photo-News    1   Dave Gentle shows images from a disc camera stored on a floppy disk.
2   Large monitor by Jeremy Jago showing cassette recorded images from electronic flying-spot equipment.
3   Peter Yanczer's jig moves mirror-screw components through accurate 11.25 degree steps while setting-up.
4   Denis A., Pedro and Edward Nowill debate some weighty matter at 2002 Conference.
5   Denis Asseman's twin-standard 'Tekade' Co receiver replica.
6   William Parker attempts mating upper part of Andy's Televisor to lower part of Denis's model.
[12]   The 1933 Derby TV Circus  by Doug Pitt.  Doug's early days of Derby TV.

Volume 28 Number 1   2002
[3] Front Cover  Three pictures of J.L.Baird's 2100 flash-lamp bulb large-screen display.
[3] Local Meetings  2 meetings scheduled for 15th October.  Contacts Ted Hardy 01825-766410 and Doug Pitt on 0115-928 2896.
[3] Notes from my 'NBTV Ideas' File (19)  by John Franklin.   "Mirror Flex" and its uses in Mihaly-Traub cameras.
[4] Changed Font  Comments on new Arial typeface.
[5] Amplifier and Inverter  by Peter Smith G4JNU.  Useful DC-coupled variable-gain inverting buffer amp with  variable output offset adjustment.
[6] Printed-circuit Boards for Eprom Generator  by Klaas Robers.  PCB diagrams, source, layout and circuit improvements to Grant Dixon's pattern generator.
[6] Reprints.  Several reprints of obsolescent TV books
[6] ERRATUM.  Typing error in Ray Herbert's piece on p6, Vol27/3.  Second paragraph should have commenced "Very few detailed..."
[7] John Logie Baird - A Life  by Anthony Kamm and Malcolm Baird.  New book review
[7] Edinburgh Exhibition.  Report on National Museum of Scotland Exhibition 12-31 August.
[7] WANTED.  Appeal for brown bakelite lampholders by Denis Assemen.
[8] Nipkow Ready Reckoner  by Doug Pitt.  Tabular aid to disc construction.
[8] Oscillating Mirrors.  Details of possibly viable NBTV application in old Maplin catalogue.
[9] 1930 German TV Breakthrough.   "Wireless World" hoax.
[9] Hell.  Obituary for Rudolph Hell of Hellshreiber fame.
[9] More Phantoms.  Comments by Brian Lucas on "phantom" transmission circuits.
[9] Liquid Crystal Shutters.  Possible use of VERY expensive LCDs in binocular stereo system.
[9] WANTED  by Doug Pitt.  Obsolete 3-transistor 8-pin D.I.L. i.c. CA3028.
[10] Transatlantic TV.  Preparations for 75th aniversary of the event
[10] Personal   Esme Pitt, wife of Doug Pitt, has died suddenly.
[10] Photo News.   1   Denis Asseman with his Televisor replica and Jan V Seischotter.
2   Large light pickup unit with built-in amplifier by Peter Yanczer.
3   Smaller unit similar to 2.
4   Peter Yanczer and Peter Smith at the 2002 Convention.
5   Sam Palmer with his captive (framed) disc model camera-monitor at 2002 Convention.
6   Image of Con Wassilieff transmitted over 400 mile path. 
7   Dave Gentle's disc-camera to floppy-disc apparatus at 2002 Convention.
[10] Reprinted Early TV Article.  Foreword to following article.
[11] Putting Vision on the Radio Programmes  by Eustace Robb, BBC Television Director.   Comprehensive article on NBTV broadcast studio techniques.

Volume 28 Number 2
[3] Front Cover  3 pictures of J.L.Baird's 2100  bulb large-screen display
[3] Annual Subscriptions  due 1st January 2003, please.
[3] Transatlantic TV Progress   Report.
[3] East Midlands Local Meeting  Report.
[3] NBTVA South East Local Area Meeting  Report.
[4] Neon Frequency Divider  by Jeremy Jago.  Useful simple 50Hz/n divider.  N.B. some neon devices are light-sensitive
[4] Photo-News  1   Daily Express Television Kit, 1934
2   Light pick-up unit for flying-spot use by Peter Yanczer.
3   The "Falkirk" transmitter, one of several claims as Baird's first camera.
4   Anne McKenzie ready to sing 'Ten Cents a Dance' and as she appeared on a replica televisor (August 2002).
5   An original "Telechrome" tube, used in world's first all-electronic colour TV receiver 1944.
6   Replica "Televisor" admired by Malcolm Baird and Brandon Inglis.
 All photos except No. 2 from Brandon Inglis and taken during Scottish Museums Exhibition 2002.
[5] Batten-mounting Brown Bakelite Lampholders  still being sought by Denis Asserman.
[5] Notes from my 'NBTV Ideas' File (20)  by John Franklin.   Attempts to use a phosphor-coated screen to reduce display flicker.   Erratum p5 para 3: "just over 1/2 sec" should be "just  over 1/12 sec".
[6] An RF Modulator for NBTV  by Vic Brown.  Easy-build effective modulator for 80 metre band (and probably much higher).
[6] Daily Telegraph Letters.   Ray Herbert's comments on letters about building Nipkow TVs.
[7] Bit-Reduced Digital Recording of NBTV  by Klaas Robers.  Report on trials with 3 different digital formats.
[7] Membership Application/renewal Form
[8] DC Restorer and Buffer Amplifier  by Peter Smith.  Useful AC-coupled LED driver.
[8] The G-QRP Club  Advertisement.
[9-12] Putting the Vision on the Radio Programmes (conclusion).  Detailed 4-page article on original NBTV broadcasts.

Volume 28 Number 3
[3] Front Panel Manufacture  by Graham Lewis.   Producing near-professional quality front panels.
[4] Annual NBTV Convention   Saturday 26th April 2003  Information, map and contact details.
[5] Conference Resolution  Klaas Robers' move to sell goods to non-members.
[5] Our Presidents (1)  Fred Ward G2CV
[5] President?   Possible definitions of the title.
[5] Convention Freebies  Useful units and contacts.
[5] Club CD Number 3  Shot in April 2002, CD includes 30/32 line interviews and members' apparatus.
[6] Benelux Meeting (report of 50 visitors, media coverage etc.)
[6] Active Smoothing   by Jeremy Jago.   Use of filtered emitter-follower rather than high volt-drop regulator ICs.
[7] NBTV RAM Download Generator   by Graham Lewis.  Holds 64 frames of NBTV.
[9] Transatlantic Success!   Notice of NBTV transmissions to USA.
[9] Obituary for Norman Rutherford.
[9] EHT Boards.  Source of supply of 3-4kV battery-powered boards.
[10] 75th Anniversary Celebration of the First Transatlantic Television Transmissions   by Ted Hardy.   Account of how it was done.
[10] Erratum    Notes from my 'NBTV Ideas' File (20)    p5 para 3: "just over 1/2 sec" should be "just over 1/12 sec".
[11] Alternative Use of the EPROM Generator    by Klaas Robers.  outlines of number of alternative uses.
[11] Dutch Language Article.  Article in "Electron" by Klaas Robers.
[12] P. Farnsworth Article.  BATC's November 2002 "CQTV" article on US TV pioneer Philo Farnsworth.
[12] "JLB" - New Film   Directed by Jan Leman.  BBC4 22nd Jan 2003 and BBC2 about 24th April.  NBTVA members credited.
[12] Are You a Star?   Your membership subs are DUE!
[12] Photo-News.  .1  Recent photo of Fred Ward, first NBTVA President, obituary in this issue. 
2 .  Authentic Baird Televisor brought by Ivo Lemmens.
3   Jo Ruffini's authentic Fultograph from 1848 (error: should be1928), Baird Televisor replica and Philips pre-production model.
4    NBTV Transatlantic special callsign as received in New York State.
5    One of Denis Asseman's Televisor replicas.
6    Members Denis Asseman and Jan Selschotter.

Volume 28 Number 4
Erratum  Vol 28/4 p 9 (Jim Hawes)   In the left-hand diagram the first (PNP) transistor base should  be connected to V+ via a 10k resistor and NOT directly as shown.  Darlington recommended is a TIP120.
[3] NBTV Convention 2003  Comprehensive reports of Convention and other news.
[4] NBTV Gamma Correction Ideas   by Steve Anderson.   Comprehensive article with circuits and descriptions.
[6] Appeal  for used printer cartridges for Hearing Dogs for Deaf People (charity)
[7] Annual Subscription   It's that time again.   Gimme five!
[7] Dutch Broadcast   Report on Dutch MW broadcast and also old 70s British radio and TV broadcasts.
[7] Daily Express Televisor   by Peter Smith.   Account of televisor sent to USA to enable reception of NBTV transmission, with description and part circuit diagram.
[9] Web-Based Amplifier Design System   by Jim Hawes AA9DT  (or is it WA9DT?)   Information plus circuits for LED drivers and info on amplifier design circuits available on Internet.
[10] Notes from my "NBTV Ideas File" (21)   By John Franklin.  Ideas on fluorescent materials.
[10] 30/32 Line Crystal-referenced Pattern Generator   by Peter Smith G4JNU.   Modified triple-waveform generator to give high-stability signals for radio transmission/reception.   Description and circuit diagram.
[12] Tomorrow's World Road Show   Shows in June and July.
[12] Wanted.   ad answered
[12] Unusual Offer   CRT unit available from J Birkett.  Units still available at issue 29/1.   Jim Hill G4LND has worked out the circuit - heavy!
[12] BATC Show   No date set yet.
 Photo-News.  1   Ted Hardy and Vic Brown at the Amberley Museum.
2    Convention 2003.  Doug Pitt, Vic Brown, Bryan Oliver and Chris Lewis with Bryan's monitor which uses VCR head bearings.
3   Replica "Daily Express" receiver as sold in kit form in 1934.
4   Garth Porter and Dave Gentle watch P.E. Smith's `D.E.` replica in action.
5   Magazine advert for "Daily Express" kit.
6   R.Pedro displays computer processed images.
7   Dave Gentle demonstrates mirror-drum projection for both transmission and reception.
8   Jeremy Jago aims a flying-spot projector at a wall clock while Doug Pitt holds the pick-up for the reflected light.
9   32-line mirror-screw receiver by Peter Yanczer.
10  View of the mirror-screw receiver with the back removed.
11  First photo taken from the screw receiver (Felix the cat).
12  32-line disc camera providing signals for the mirror-screw receiver.

Volume 29 Number 1   2003
[3] Our Front Cover   Peter Smith, Vic Brown and Ted Hardy at Amberley Working Museum.
[3}  Patterns on CD.  Crystal-referenced patterns available on CD from Club Sales (p2).
[3] CRO Converter for NBTV   by John Lawrence GW3JGA   Allows NBTV signal to be displayed on an oscilloscope.
[4] The Invention of the Mirror Drum   by Ray Herbert.  Mirror drum pioneers.
[4] Opto-switch tip.  Two switches in old computer "mice"
[5] Don't Dump That VCR!   by Steve Anderson.  Use of head motors for disc drivers.  Comprehensive how to/how not to do it article with diagrams.
[8] Local Meetings  East Midlands and South-East provisionally fixed for 12th October.   Addresses and contact numbers.
[9] New Printed-Circuit Board for Triple-Waveform Generator   by Klaas Robers.  Circuit and new pcb layout.
[10] JLB - The Film   Extensive review by Andrew Henderson
[11] That Missing Pulse   by Doug Pitt.  Reasons for this system and its history.
[11] London Lectures   Several lectures at IEE and Institute of Physics.
[12] Improvisation   Michael Robertson's try-out cogwheel sync.
[12] Erratum  Vol 28/4 p 9 (Jim Hawes)   In the left-hand diagram the first (PNP) transistor base should  be connected to V+ via a 10k resistor and NOT directly as shown.  Darlington recommended is a TIP120.
[12] Mirror-Screw Project   Peter Yanczer (Missouri) offers mirror-screw kit as personal venture.  Access to lathe advantageous.  *N.B*  Some copies erroneously refer to"drum" instead of "screw".
[12] British Telecom Tester   Units still available as of this issue.  Jim Hill G4LND has worked out the circuit.
[12] Photo-News    1   Don McLean receiving the Ducan Neale award.
2   Michael Robertson's Lash-up sync gear.
3   Lens-disc camera built by Dr. Ken Skelton with 28 lenses in single spiral.
4   Nipkow disc receiver with 28 holes for camera shown in 3 above.
5   Sixty-line disc camera and receiver built by Roger Dpupouy.
6   Peter Yanczer's disc camera with built-in lamp.
7   View of Tomorrow's World Roadshow set, Birmingham.
8   T.W. Roadshow characters.
9   Group (inc NBTVA volunteers) around box containing Peter Smith's 'Daily Express' replica.
10   More T.W. Roadshow characters and Vic Brown.

Volume 29 Number 2
[3] Annual Subscriptions   Due 1st Jan 2004.  Info on payments, areas postage etc.
[3] NBTV Sync Stretcher   by Graham Lewis.  Small but elegant circuit which allows incoming 30% syncs to be varied from 30-100% (no video).  Very useful for taped NBTV.
[3] Mirror-Screw Demonstration  by Peter Yanczer in Rochester, USA.
[4] NBTV Transmitter for Ten Metres   by Klaas Robers, PA0KLS   4-valve crystal-controlled transmitter with full description and circuit.
[6] Notes from my "NBTV Ideas File" (22)   By John Franklin.  Ideas on using a 9" aperture drum to produce a 2" x 3" picture.
[7] NBTV Membership Application/Renewal Form
[8] NBTV Local Area Meetings.   Reports on last October's South-East and East Midlands meetings.
[8] US Website report.   Detailed ARRL website report on Transatlantic NBTV transmission.
[8] Test Pattern CD   from Club Sales.  Nine useful tracks from Peter Smith's test pattern generator.
[8] The G-QRP Club Membership advert   £6 per year for quarterly hefty newsletter plus contact address.
[9] CRT Display for NBTV  by Steve Anderson.  Comprehensive description and full circuits for hybrid CRT display with drivers.
[12] John Logie Baird Lecture   Report on IEE lecture
[12] Letter to the Editor  Very interesting letter from Jim Hawes AA9DT suggesting use of subcarrier on NBTV over-air transmissions to avoid LF cut-off in normal transmitters, reversing the process on reception.  Should allow normal amateur transmitters to be used with less modification.  Works on same principle as carrier-type NBTV tape recording.
[13] Photo-News    1   Workshop of Leeds-based 'Screenhouse Productions' where Peter Smith   (with Doug Pitt) provided TV gear for pilot of "Science Revealed" to appear on Discovery Channel in near future.
2   Peter and Doug with presenters Jem Stansfield and Sim Oakley at Leeds.
3   10-Metre NBTV transmitter (this issue)
4   Closeup of tx showing neutralising wire.
5   Apparatus by Peter Smith at IEE lecture (see report) much as employed at Leeds.
6   Rear view of CRT unit by Steve Anderson (this issue)

Volume 29 Number 3
[3] Annual NBTV Convention  Saturday 24th April 2004  How-to-get there instructions with map and contact phone numbers
[4-6] NBTV Frame Rate Converter  by Graham Lewis.  Electronic NBTV flicker-reducing frame-rate quadrupler with good description and all circuits.
[7] Colour NBTV on Compact Disc  by Vic Brown G3SDQ.  Experiments in 3-channel colour with diagram of 4-channel decoder from CD player
[8] Spherical Aberration   by Klaas Robers PA0KLS.   Lenses and how to reduce the effect
[9] Modulator Tip   by Jim Wood.   Use of video modulator units from scrap VCRs
[9] Our New President.   Malcolm Baird is new president of NBTVA.
[9] Our Front Cover   Apperatus built by Benny Ahlburg of Denmark for his NBTV museum.
[9] C. Grant Dixon   Obituary.
[10] Cog-Wheel Sync - 2004 Model   by Benny Ahlberg.   Description and circuit for cog-wheel synchroniser on front cover
[10] Image Communication Handbook  by Dr. R. E. Taggart WB8DQT.   Techniques of several tv modes including NBTV (obtainable from RSGB)
[10] Photosensor LEDs.   Jim Hawes AA9DT describes use of LEDs as photo-sensors and points out they are somewhat selective in colour range (RGB NBTV???).
[11] Aspect Ratio   Club standards
[11] Rediffusion "Translators"   Offer of free UHF TV tuner boxes for NBTV use with info, circuits etc.
[11] Member's Report   Report by Danny Gosson of New South Wales on home-built equipment.
[11] Wanted  by Jeremy Jago copy of "Amateur Cine World" (Nov 1948) article.
[11] Alfred Abramson Obituary  Writer on tv topics including television history.
[12] Super NBTV - an epilogue   by Doug Pitt.  Doug's 1979 "CQTV" mag article on precursor to Graham Lewis's frame-rate multiplier.
[12] Photo-News   1  Grant Dixon at the BATC show in 1998
2  Test card used by Benny Ahlburg, similar to original BBC tuning card
3  30-line mirror-screw receiver, 1934.
4  Victor Buckland with a Baird "camera" (flying spot projector) in Derby, February 1933.
5  Soko the puppet, constructed specially for TV in 1930.
6  Benny Ahlburg's receiver.

Volume 29 Number 4
[3] Our Front Cover   Baird's 1925 floodlight apparatus, able only to send flat shapes.
[3] Testing CR Tubes   by Jeremy Jago.   Assessing usefulness of CRT types for NBTV.
[3-4] Television and Me (review). Essentially a new edition of "Sermons, Soap and Television".
[[5] NBTVA Convention 04 report
[6-7] Start or Finish?   by Doug Pitt.   Sync standards.
[7] JLB Lecture   by Ralph Barrett at the IEE HQ in London 23rd October.
[8-10] A Non-Mechanical NBTV Monitor Update   by Steve Anderson.   CRT monitor with description and circuits.
[10-11] Making a Mirror-Drum   by Jeremy Jago.   Practical advice on making your own.
[12] Letter to the Editor  from Steve Anderson on preserving Baird information and equipment.
[12] Photo-News   1   Parallel system by Vic Brown, displaying bright, well saturated colour pictures on Nipkow disc
2   Queue to see Vic's colour pictures.
3   Doug Pitt presented with golden disc (Daily Express design) by Denis Asseman at  the recent Convention.
4   Ralph Barrett at the Institute of Physics on 10th December 2003 for his "Baird and the Atlantic" lecture.
5   Chris Lewis demonstrates CD images on his PC screen.
6   Dave Gentle shows Denis Asseman some mirror-screw images.

Volume 30 Number 1   2004
[3] Our Front Cover    Baird with his Telechrome tube.
[3] Three Anniversaries  The Telechrome tube, start of 30-line TV service and Fleming's patent for triode valve in 1904.
[3] E-Mail Addresses  by Klaas Robers.   Note on NBTV website members' addresses.
[3] Copyright  Explanation of freedoms and responsibilities when using NBTVA copyright material.
[4] J.L. Baird's Telechrome (the first colour TV tube) by Ray Herbert, plus Doug Pitt's comments.
[5] Club Handbook.   Fresh stock of NBTV Handbooks.
[5] Plans and Progress.  Work by Dave Gentle and Steve Ostler.
[5-6] Sync Processor for Mechanical Cameras  by Jeremy Jago.  Sync circuit for use with mirror-drum in 29/4.
[7] NBTV and Chevreul by Dave Gentle.   Comments on greyscale and our illusions of what we think we see.
Benelux Meeting on Staurday 18th Sept 2004 in Almere.
[7] Local Meetings arranged for Oct 2004.
[7] Russell Burns  (former NBTV President) very ill.
[8]That Elusive Spot   by Doug Pitt.  Controversy over writings of Albert Abramson.
[8] Award.  Don McLean awarded the George Shiers Award for 2004.
[8] Museum Acquisition.   National Museum of Scotland has acquired a Model 950 TV receiver (1948) for RCA sequential colour system
[8] White LEDs.   Club acquires some white LEDs (sold out at present).
[9-12] Multipath Shortwave Propagation on NBTV - Test Results on 1840kHz  by Chris Long - Melbourne, Austraila.   Comprehensive article on radio propagation and effects of fading.
[12] Book of the Week.   B.B.C. Program serialises "Television and Me".
[12] Photo-News 1  Convention 2004. Foreground: Klaas Robers, Doug Pitt, Vic Brown.
2   CR0 image of Dave Gentle, converted from 625 lines.
3   Convention 2004. Dave Buddery and Pete Smith.
4   Ambrose Fleming (left), inventor of the diode valve, whose centenary is this year. Pictured with J.L. Baird in 1929.
5   Convention 2004. Graham Lewis, Steve Ostler, Vic Brown, with Vic’s colour NBTV display unit.
6   Convention 2004. Foreground: Dave Gentle, Sam Palmer, Pete Smith.

Volume 30 Number 2
[3] Our Front Cover   Equipment supplied by Peter Smith for the recent I.E.E. Lectures in Birmingham.
[3] Notes from my "NBTV Ides File" (23)  by John Franklin.  Corrections for (rare) mistakes in V29/2, p6 article.
[3] NBTV South-West Area Meeting 10-10--4   by Ted Hardy G3GMZ.  Meeting was held at Laurie Booth’s house in Emsworth.   Peter Smith showed copy of only surviving original example of a Baird medium wave television receiver circa 1930  and also demonstrated a valve crystal oscillator using a hand made crystal ground from one lens of a pair of Victorian spectacles.   Vic Brown demonstrated his 32 line disc colour monitor showing colour still and moving  pictures recorded on CD.     Laurie Booth showed unit he had made using two small earphones close to each other to provide acoustic coupling of AC signals to and from a computer, restricting computer noise transmitted by direct wiring.  Ted Hardy and Peter Smith,  using disc monitor and a computer display, demonstrated video test signals fed into a video transmitter drive unit giving about 1 milliwatt output and received on a crystal set. Various other signals recorded as wave files on CD were shown.    As expected the test transmissions on 80 metres raised operational and technical queries and provided many points for discussion.
[4] ANNUAL SUBSCRIPTIONS    due on the 1st January 2005. The fee remains at £5.00 which gives delivery of the newsletters world-wide by surface mail. It is also a currency note, enabling members outside the Sterling area to pay by cash if necessary  by buying one.     For delivery by airmail there is a surcharge of £2.50 making a total of £7.50, but subscribers in Europe should not pay this as it gives no advantage.  In emergency, £7.50 may be replaced by US $15.00
[5] Recordings Relating to William Taynton Made on 22nd April 1948.   Disc recordings of  account by Baird's first televised live subject.  Also notes on probable origin of discs.
[6] North Wales NBTV Demo   by John Lawrence GW3JGA.  Demo at Conway Valley Amateur Radio Club.
{6] Frame-Sequential Colour Receivers  Wayne Bretl (Illinois) reports on standard converter to allow testing of these old receivers.
[6] Antique Wireless Association Awards   Awards (among others) to NBTVA members.
[6]The G-QRP Club   Membership advert.
[7] New South Wales Demo  Daniel Gosson of Stuart's Point in NSW has given a public demo of moving NBTV pictures at rally with 4000 attendance.
[7] East Midlands Meeting 24-10-04. JJ's updated PMT camera and Dave Gentle's colour monitor etc
[7] ] 2004 NBTV-Benelux Meeting at Almere 18th Sept 2004.   Report and descriptions.
[8-11] Multipath Short-Wave Propagation   by Chris Long (conclusion)  Very comprehensive  article on NBTV over amateur radio, with many off-air screenshots and many technical references.
 WRITE SOMETHING!   If you have a bright idea, a tip, or anything else that might interest other members, please  put it down on paper and send it in.   Provided your meaning is clear, what you send in can be transformed into an acceptable printed item.   Thumbnail sketches on the back of the proverbial cigarette packet are perfectly acceptable.   The ideal medium for delivery of material is the floppy disc as this speeds up the editing process. Use a well known program like “Word” or “Wordpad” or any kind of plain text.   Don’t forget that we can always use photographs ( prints not negatives).    If sent in digital form, please avoid exotic compression systems.   Use something like .GIF, .BMP, .JPG.
[12] ERRATUM  Page three of V30/1 the start of the London 30-line TV service was stated to have been in AD 1020 (in good time to cover the Battle of Hastings!) instead of the intended 1929.
[12] Photo-News   1.	Camera used by Peter Yanczer at this year’s AWA meeting in Rochester.  The pictures were displayed on a large mirror- screw monitor with its axle vertical.
2   Hexagonal (Noah's Ark) receiver built by Daniel Gosson (New South Wales) for the local ‘Rusty Iron’ Rally.
3   Screen picture from Daniel’s receiver; signal derived from a Club CD.
4, 5 & 6   Visitors to the Benelux NBTV meeting photographed unawares.

Volume 30 Number 3
Front Cover  Steve Anderson's NBTV signal recorded on domestic VCR (see page 12 for article)
[3]  Annual NBTV Convention Saturday 16th April 2005  Map and how-to-get-there instructions
[4] A Box-file Monitor  by Keith Locking.   Description of monitor built in Box-file case (no diagrams).
[5-7] NBTV Display using PIC  by Graham Lewis.  description with block diagram.
[7] Luxeon (multi-watt LED).  Chris Long has used one has used one, with BPW34 receiver,  for 100+ miles communication.  Includes Luxeon driver circuit.
[8] Imperial College Gabor Lecture  by Klaas Robers on November 17th 2004.
[8-9] 625-line Conditioner  by Peter Smith G4JNU.  Pre-scan converter signal conditioner, with description and circuit.
[10] NBTV Ideas File  Request for feedback on any ideas tried.
[10-11] Notes from my "NBTV Ideas" File  by John Franklin.  Idea to double display flicker frequency using special display disc and time delay.
[11] AWA Conference  by Peter Yanczer.  Description of Peter's extensive apparatus on exhibition.
[11] White LEDs  Supply exhausted.
[12] NBTV on Tape  by Steve Anderson.  NBTV signal "piggy-backed" onto FSTV signal on domestic VCR.
[12] Steve Ostler's Progress with his New Colour NBTV Project.  Description and editorial comment on difficulties with infra-red filters.
[12] Photo-News 1  Boxfile monitor (see article) closed.
2  Boxfile monitor open, showing disc.
3  AWA meeting.  Peter Yanczer's apparatus.
4  AWA meeting, picture from screen (original in colour?).
5  Mille Suoni (1000 sounds) museum, Bologna.  Right, G. Pelagelli (owner); left M Bertaglia.   "Stanton" 30-line receiver cabinet between.  (Photo: Denis Asseman).
6  Contemporary advertisement for the Stanton cabinet as designed to accommodate the "Daily Express" receiver.

Volume 30 Number 4
[3] Our Front Cover.   Steve Ostler demonstrates his 2-disc colour system to Jeff Myers at the 2005 Convention.
[3] Convention 2005.  Full report.
[4-8] Four-Quadrant LED Scanner  by Kevin Hadfield.  Description with mechanical and electronic diagrams for the rotating all-LED display shown at the Convention.
[8] The Dawn of Television Remembered.   Doug Pitt's review of Don McLean's impressive work on CD and DVD ROMs.  Covers part of material in Don's book "Restoring Baird's Image" and (out of print) "Here's Looking at You" by Bruce Norman. 
[8] Betty Bolton,  popular singer of stage, screen and TV,  has died at the age of 99.  Obituary to follow.
[9] 625 to 32 Line Converter - a software solution   by Ripley Pedro.   Description of Gary Millard's program AVI2WAV FSTV-NBTV converter, which generates 44kHz-sampled (silent) pictures to HDD or sound card in 32-line NBTV standard format.
[9] Obituary  for Peter Scheulderman.
[9] A new Record?  Ray Herbert's info on Baird Televisor sold by Christies of London for £13,000.  Search yor attics!
[10] NBTV and Signal-to-Noise  an experiment by Jeremy Jago and Doug Pitt.   Practical results from experiments on very weak signals.  Comment by K. Vickers G1NAF.  Provided the signal is above the noise in the relatively narrow video carrier-recovery channel, the modern switching demodulator DOES work, even though the signal may be buried under 6MHz wideband noise.
[10] TeraHertz Band Link.  Exploits of five-strong team which optically transmitted 2-way voice over a 167Km range between Tasmania and New Zealand.  With 10MHz bandwidth even TV (FSTV?) was a possibility.
[11] One-Shot Line Advance  by Peter Smith G4JNU.  Description with circuit to advance NBTV frame reliably line-by-line to achieve proper framing on a covered (no fingers!) disc.
[11] LEDs for Beads  Jim Hill G4LND Suggests use of LED casings IF a maker can supply them.
[11] Club Sales  Addition of Don McLean's "Dawn of Television"  CD + DVD work to club stock.
[12] Modified Neon Oscillator  by Jeremy Jago.  Interesting add-on circuit to give much larger output voltage from neon relaxation oscillator. 
[12] Photo-News  1   Circular captive disc monitor by the late Peter Scheulderman {Ho!land)
2   P Smith shows off replica of German dual standard receiver
3   Precision mirror-drum by Peter Scheulderman
4   Vic Brown's colour NBTV apparatus
5   Peter Smith's animated Stooky Bill in action
6   Improvised mirror-drum camera with CRT monitor ( J. Jago)
7   Kevin Hadfield's novel "carousel" monitor (stationary)
8   K. Hadfield's "carousel" in motion
9   Jackie Asserman cuts the Club's 30th birthday cake
10  Graham Lewis's VDU display, driven by PIC circuitry
11   Fifteen-line colour camera-monitor by Dave Gentle
12  Windmill and image (J .Jago)

Volume 31 Number 1   2005
[3] Our Front Cover.  Ray Herbert, our Club's fifth President (1986-89).
[3] Obituary for Ray Herbert, our Club's fifth President , who died on 20th July 2005, aged 87.
[3] Erratum  in V30/4 Photo-News photo 6 apparatus attributed to Vic Brown was in fact built by Gary Oliver.
[3-8] Using a Domestic VCR to Record NBTV Video  by Steve Anderson   steveand@samart.co.th    Description, block and circuit diagrams.
[8] Ray Herbert, C. Eng. (1918-2005)  An appreciation by Malcolm Baird.
[8] Local Meetings  Notice of local meetings.   Nottingham on Sunday 16th October at 2pm at Doug Pitt's house. Tel 0115 9282896    South-east meeting at Ted Hardy's house on Sunday 9th October.  Tel 01825-766410
[8] Octagon TV Receiver    Denis Asseman intend to build a replica of the disc receiver designed by the American General Electric Company in 1928.
[9-12] Television, Radar and J. L. Baird  by Malcom Baird, Douglas Brown and Peter Waddell. Description of little-known activities up to and during WW2.  Many references
[12] About the authors  of the article above.
[12] Figure of J.L. Baird's patent GB292,185
[12] Radio Imaging for Television - A Challenge to NBTVA Members!   by Malcolm Baird.  J. L. B.'s  early schemes used radio waves to illuminate subjects as RF sensors were more sensitive than light ones.  Description of above patent.
[13] COPY NEEDED   Appeal for copy, particularly short items and photos.
[13] Interlacing for NBTV?   by Steve Anderson   steveand@samart.co.th    Suggestion of quadruple-interlaced scanning and appeal for anyone else's experiences with this.
[13] Club Sales     Members who want a copy of the two-CD set, 'Dawn of Television Remembered' can order it from Club Sales, price twelve pounds fifty pence.
[13] Photo-News 1 Candid camera shot, 2005 Convention.
2  Group photograph, 2005 Convention.
3  'Octagon' receiver by US General Electric Co. in 1928.  Denis Asseman replicating one.
4  Chassis of mirror-drum receiver Stubbekobing (Denmark) Radio and TV Museum.
5  Front view of replica Telehor receiver at Stubbekobing.
6  Rear view of replica Telehor receiver at Stubbekobing.

Volume 31 Number 2
[3] Our Front Cover  Steve Ostler's colour NBTV, with disc details.
[3] Annual Subscriptions   still five pounds and due NOW!
[3] Club Sales  Fresh supply of lenses now available, with details.
[3-5] A Simple Mechanical Colour System  by Steve Ostler.   Description of system and problems encountered, with some solutions.
[5-6] Obituary for Betty Bolton  Betty Bolton has died on 2nd April 2005 at the age of 99.  Story of her career in LDTV.
[5] Membership renewal form
[6] Interlacing - a Background  by Doug Pitt.   Information and discussion on pros and cons.
[6] Further Comments on Interlacing by Reg Moores.  Further comments invited by Editor.
[7-8] Compatible Colour NBTV on CD (CCNC)  by Klaas Robers and Vic Brown.  Description of how system works and results, but no actual 
diagrams.
[9] NBTV East Midlands Meeting 16th October 2005.  Report
[9] Model Engineering Exhibition   to be held on 29th-31st December at Sandown Park.
[9] Benny Ahlburg  has recently completed a PMT camera and sent in photos and images obtained, recorded on a CD.
[10] Colour NBTV on Compact Disc   by Vic Brown G3SDQ.   (Mis) adventures using multi-channel PC sound card for 4 separate channels.
[11] An Unusual Demonstration of Mechanical Television  by Dave Buddery G30EP.  Demonstration of NBTV to an amateur radio club.
[11] Reminiscences  by Kevin Hadfield  Early TV from various personal experiences.
[12] Mechanical Amplifiers   Notes on their operation.
[12] Postscript  Could use of only mechanical amplifiers and only materials available in 1910 achieve TV images?  Any takers???
[12] Obituary  for Sam Shulman
[12] Photo-News  1 New PMT camera by Benny Ahlburg seen from rear
2  Partly-bult TekaDe dual standard receiver under construction by Peter Smith.
3  S.G. Brown Phone amplifier c. 1925 (Relay type amplifier)
4  S.G. Brown Freno-phone c. 1925 (Brake type amplifier)
5  Mirror-drum Projector by Dave Gentle.
6  Image from Dave Gentle's mirror-drum using Luxeon light.

Volume 31 Number 3
   Collection of working NBTV apparatus by a small group of south-east members shown at the Model Engineering Exhibition held at 
Sandown Park
[3-4] Annual NBTV Convention Saturday 22nd April 2006.  Map and how-to-get-there instructions.
[4] Conference Resolutions: None have been received this year.
[4-5] Dual PIC NBTV-to-VGA dispaly Converter   by Graham Lewis.  Description with block diagram of this mighty effort.
[6] Mechanical and Cathodic Television Workshop  by Roger Dupouy of Association for the Conservation and Heritage of Mechanical television.  Announcement of exhibition to be staged at Clermont Ferrand, France, with many replica models, including mechanical and CRT types.
[6-7] Battery Eliminator  by Peter Smith G4JNU.   Comprehensive multi-output PSU mainly intended to supply vintage valve equipment, with circuit and description.
[8] TV, UK and USA  by Doug Pitt.  a few snippets of early TV broadcast history.
[8] NBTV at the Model engineering Exhibition   by Laurie Booth.  Description of NBTV activities, plus some on main exhibition.  Congratulations on Sandown team for putting on such a good NBTV exhibition at short notice.
[9] John Logie Baird and RADAR  by Steve Anderson.  Article with thoughts on implications of article "Television, RADAR and J. L. Baird" on Vol31/1.
[10] Television is 80 Years Old   by Malcolm Baird.    Brief history of TV from 1926 to present, with two web addresses given for further reading.
[10] Stookie or Stooky   Possible confirmation on correct name of "Stookie Bill" dummy.
[10] 60-Line Mirrow Screw   Peter Yanczer (USA)  has finally produced a good picture - see Photo-News.
[11] Perils of Invention  by Reg Moores G3GZT.  Revolutionary line-removal system, and how it was possibly stolen.
[11] Aurora Multi-Standard Converter.which accepts 525-line NTSC or 625-line PAL input and outputs 16 vintage TV standards, made up when enough ordered to justify a production batch.
[12] NBTV Monitor  by Michael Robertson.  Electrical details of very simple NBTV display, which is connected directly to mains supply  - CAREFUL!
[12] Photo-News  1 Chris Long and Mike Groth with record-breaking light communication equipment.
2  Malcolm Baird speaking at the Frith Street, Soho venue.
3-4  Pictures of Johnny Carson and Steve Martin on Peter Yanczer's 60-line mirror-screw.
5  Battery eliminator by Peter Smith in this issue
6 Benny Ahlburg's recently-built PMT camera

Volume 31 Number 4
[3] Our front Cover  Dave Gentle on Jeremy Jago's CRT monitor as photographed by mobile phone.
[3] 2006 Annual NBTV Convention   Report on exhibits and exhibitors.
[4] Conference   Discussions on subjects affecting present and future, financial report, report on amateur band radio activity etc.
[4] National Vintage Communication Fair  Report by Peter Smith G4JNU.  Report on NBTV activities.
[5-6] Bargraph IC for NBTV  by Kevin Hadfield.  description and diagrams for display using LM3914 bargraph IC.
[7-9] NBTV PIC Video Test-Pattern Generator  by Graham Lewis.  discription with picture of display and circuit.
[9-11] A New Display Method  by Jeremy Jago.  Fairly simple yet novel CRO display adaptor giving positive AND negative displays without need for brightness modulation.
[11] Caution  WARNING of effects of non-visible infra-red diodes and potential eye damage.
[11] The Last 30-Liner  by Dave G3OEP.  Who WAS the last person "televised" by the original 30-line system?
[12] 3-D Colour NBTV - An Update  by Steve Ostler.  Description of recent innovations in Steve's monumental work.
[12] Conducted Tour  Suggestion of conducted tour of Convention NBTV exhibits, introfuced and explained by owners -  tried at 2007 Convention and works well.
[12] Deadline for the Next Newsletter  Vol32/1 is September 1st 2006.
[12] Obituary  for Sam Shulman
Photo-News 1 Portrait of D,P, from club CD recorded onto 78rpm lacquer-aluminium disc by Benny Ahlburg and replayed by Jeremy Jago.
2  Crowd watching Benny's audio-disc playback
3  Peter Yanczer's mirror-drum with added motot and pulse-generating disc.
4  Telehor and Daily Express receivers by Denis Asseman.
5  Apparatus for making an indexing disc, as used by J.J.
6  Steve Ostler's colour camera.
7  Presentation of Les Robotham's gift by Peter Herman.
8  Edward Nowill's camera apparatus for capturing a single NBTV frame.
9  Graham Lewis shows his signal generator and other PC-based circuits.
10  Recorded face of Klaas Robers displayed by shift modulation (see p9-11).
11 Toothed-wheel control for Peter Smith's mirror-screw.
12 Dave Gentle's colour camera and mirror-drum projector.

Volume 32 Number 1   2006
[3] Our Front Cover  "Ancient and Modern" tableau at this year's National Communications Fair in Birmingham.  Report in last issue
[3] Heinrich Hertz  A talk by Ralph Barrett about the famous radio-wave pioneer is scheduled for Wed 13th December 2006 at Institute of Physics, 76, Portlnd Place, London W1N.
[3-7] Zero-Hunting Disc Monitor (Nipkow Disc Monitor with Synchronisation of Video data to the Disc)  by Kevin Hadfield.  Complex system, with circuits and description.
[7] In Brief  Appeal for ANY item on ANY useful subject.
[7] A Timebase Tip  by Jeremy Jago.  Strange non-linearity fault in Miller timebase cured by replacement of (apparently) perfect capacitor.
[8] EHT Supply for XP1110 PMT  by Benny Ahlburg.  Circuit with component values and LOPT mod details.
[8] 8th Anniversary of 2TV  Famous call-sign activated.
[8] The National Museum of Photography, Film and Television, Bradford  by Peter Smith G4JNU.   Opening of new gallery and list of exhibits by NBTVA members.
[9] The Last 30-Liner by Peter Smith G4JNU.  Comments on Dave G3OEP's article and some more NBTV history.
[9] Submitting Articles to the Magazine  Information on best way to submit articles etc for easiest editorial processing.
[9] Deadline for the December Issue is 4th November 2006 for Vol 32/2.
[10] South-East Area Group Meeting  is to be held on Sunday October 8th at 1B Calvert Road between mid-day and 6pm.  Ted Hardy on 01825-766 410
[10] East Midlands Local Meeting  to be held on Sunday 15th October from 130-6pm at Doug Pitt's address.
[10] Nipkow Discs for sale  A Darvic Nipkow disc is presently available from Club Sales - only ONE per member.
[10-11] More on Gamma Correction (and possibly a confusion identified)  by Garth Porter G8HFX.  difficulties in setting standards - or do we even need one?  Pros and cons Discussed, plus editorial comment.
[12] Article sought Jeremy Jago needs article from November 1978 'Practical Electronics'.
[12] Obituary for Les Robotham G8KLH.  16 years in Sales - Thanks Les.
[12] 3-D Colour NBTV - An Update  by Steve Ostler.  Yet more improvements, with descriptions. 
[12] Photo-News  1  William Tainton in 1968.  The "last last" televised face?
2  Picture of Les Robotham,
3  1934 Scophony rear-projection mirror-screw receiver (Bradford).
4  Imposing collection of historical TV receivers (Bradford).
5  Steve Ostler's latest (3-colour) camera.
6  Baird 1932 "Tin Lizzy" partly hiding a home-built receiver by schoolboy Norman Stokes.

Volume 32 Number 2
[3] Our Front Cover  A Daily Express kit next to a matching "Stanton" style cabinet is shown at the Benelux NBTV Meeting in Budel.
[3] Deadline for the March 2007 issue is Staurday 10th February 2007
[3-4] Notes From My NBTV "Ideas" File (25)  by John Franklin.  Interesting idea to reduce 12.5Hz strobing effect by using camera-monitor disc with pseudo-random hole pattern.  i.e. light is scattered around the viewing area, apparently at random, at much faster than frame rate.  Anyone prepared to try it?
[4] A Drill Tip  by Jeremy Jago.  It seems that power drills can be run at very low speed with an ordinary triac dimmer, but read article first.
[5] Your Help Invited.  Appeal for contacts to advertise NBTVA activities and encourage membership.
[5] Annual Subscriptions due 1st January 2007, still five pounds.  See advert for airmail and PayPal charges.
[5] Station GB2KZ DVD enclosed in Vol. 32, No. 2 by Peter Smith G4JNU.  Description of contents etc.
[6-9] Phase-Locked Line Sync - an analysis of a popular existing circuit, with some unexpected results  by Garth Porter.  Comprehensive analysis of properties of the 4046 PLL IC and the circuit shown using it.
[9] Miniature Televisor Kit  Surprisingly good at just under 30 pounds, apparently using NBTVA circuitry...
[9-10] Cub Demo 2004  by Peter Smith G4JNU. Description with circuit of simple camera-monitor for demonstration to Cubs group in 2004.
[11] Southwest Area NBTVA Meeting 8-10-06.  Report on local meeting.
[11] East Midlands NBTVA Meeting 15-10-06.  Report on local meeting.
[11] Benelux Meeting  Report on Benelux Meeting at Budel, Holland.
[11] Membership Application Form for 2007
[12] Daniel Gosson (NSW, Australia)  Brief report on his activities.
[12] Historic Event  by Dave Buddery G3OEP  Historical article on first post-war demonstration af amateur HD-TV in attempt to obtain licences to transmit it on the amateur UHF bands.  Footnote. This was also used as a crafty means of getting "airborne" without the dreaded Morse test by some, who were later given full 'A' licences when the special /T licence was dropped.  - KV
[12] Chris Long has now become a licensed amateur with callsign VK3AML, previously held by a late friend, Tony Sanderson.
[12] Photo-News  All photos in this issue are of exhibits and visitors at the recent Benelux meeting of the NBTVA, held at the Jan Corver Museum in Budel, near Eindhoven (photos courtesy of Denis Asseman and Jo Ruffini).

Volume 32 Number 3
[3] Annual NBTV Convention Saturday 21st April 2007  Map and how-to-get-there instructions.
[4] Our Front Cover  The Miniature Televisor mentioned in the last Newsletter.  This is the first commercially-produced 'Televisor' since 1935 in Britain and possibly in the world.
[4-5] Improved Baird Sequential Detail Scanning System  by Steve Mican.  Background of this system to increase flicker rate to 37.5 FPS, while scanning at 12.5 FPS, with diagrams of expected scans.
[6] The Motor Drive Circuit Revisited  by Peter Smith G4JNU.  Further information on Garth Porter's analysis from the orignal designer.
[6] Let Us Know  about Newsletter delivery problems.
[6-9] A CCNC Decoder  by Klaas Robers and Vic Brown.   CD to colour-disc monitor.  Description of operation with circuit diagram - not for beginners!
[9] Coated Paper Please.  Appeal by Jeremy Jago for inkjet prints to be sent in to be on glossy or matt coated paper to avoid poor image reproduction.
[9] Baird Televisor Kit - Update  by Peter Smith G4JNU.  Information and mods for the kit produced by TR Ltd.
[10] Filmed Holes   Doug Pitt's write-up on information from Andrew Davie (Tasmania)  on his work with film as scanning holes.
[10] Tips  by Dave Buddery G3OEP  on alternative aerial insulators, mobile radio and good-quality electric motor source.
[10] Jim Wood (California) comments on use of a large round cake tin as a monitor drum and comments that 'hobby' type shops can be a rich source of NBTV materials.
[10] Club Discs.  Vic Brown needs to know preferences so he can have the most popular size made for the club.  Comments please to Club Sales address or vic@nbtv.org or write via the Editor.
[11] SNADARC Rally.  Report on the South Normanton and District Amateur Radio Rally in March and NBTV activities there.
[11] Early Television in Ohio  by Don McLean.  report on Spring 2005 Early Television Convention in Columbus, Ohio.
[12] DVD Thanks from club and many members to all those involved in production of the DVDs enclosed with the last Club Newsletter.
[12] A Lens Tip  by Jeremy Jago.  How to find the focal length on various types of lens.
[12] Further Work on Shift Modulation  by Jeremy Jago.  A version with high-voltage drive for old oscilloscopes with no X amplifier is in progress.
[12] Photo-News 1  Jim Wood sizes-up a king-size cake tin for possible NBTV use.
2  Dave Gentle's recently-demonstrated colour camera, having some resemblance to Baird's 1928 apparatus.
3  Steve Ostler's colour camera using three PMTs (see recent update items in newsletters)
4  Self-portrait of Daniel Gosson (NSW) from the screen of his 'Noah's Ark' receiver.
5  Early TV Museum (Ohio) has this RCA 60-line receiver dated 1930.
6  Italian "Fracarro" receiver (1932) at E. T. Museum, Italy.

Volume 32 Number 4
[3] Front Cover  shows Adam Hart-Davis relaxing among assorted Bairdiana during a recent studio session.
[3] 2007 NBTV Convention  report.
[3] Hint from Ron Rowe (Plymouth) Try Soliton II free sound editor  from   (could be wrong about the comma)
(ADD-ON)  Also try Audacity from http://audacity.sourceforge.net - also free and amazingly good, with extensive built-in help.
[4-7] Improved Baird SDS System (conclusion)  by Steve Mican.  Compatible monochrome/tri-colour system.
[7] Time Marches On.  Comment by Doug Pitt on future of Newsletter and request for suggestions.
[7-8] Book Review  by Malcolm Baird on  'Enhanced Visualisation: Making Spaces for 3-D Images'
[8] Obituary  for Ted Rhodes G2ADN of Derby.
[9] Experimental Gantry  by Edward Nowill  for testing scanning discs, strobe discs etc.
[9] Mechanical Oscilloscope for Audio Frequencies  by Edward Nowill.  Vibrating-mirror system.
[9] Digital Television  by Peter Smith G4JNU.  Problems with Digital terrestrial TV reception.
[10] TV Scanner  by Edward Nowill.  Four-speaker electromagnetic mirror scanner.
[10] Strobe Discs  by Edward Nowill.  Photos of collection of strobe discs.
[10-11] Missing-Sync Pulse Shifter and Line Shift  by Peter Smith G4JNU.  Comprehensive  crystal-controlled sync seperator, stripper and new-sync inserter.
[12] Jig for Making Scanning Discs  by Edward Nowill.  Disc-punching mechanism for discs up to 16 inches.
[12] Copy Please  The eternal Quest!
[12] Copy Date.  Date for latest copy for September issue is 10th August 2007.
[12] Presidency.  Malcolm Baird has retired from the Presidency after three years.
[12] Photo-News    1  Kevin Hadfield and Denis Asseman discuss weighty matters at the 2007 NBTV Convention.
2 Convention display by Chris Lewis using down-converted 625-Iine signals and a disc display.
3 Kevin Hadfield’s carousel monitor, now giving pictures in colour.
The apparatus is photographed at rest.
4 Colour carousel in motion giving horizontal colour stripes.
5 Stationary bead disc (Doug Pitt).
6 Peter Smith’s imposing display using novel circuitry.
7 Mini TV showing coloured images from CD.
8 Dave Gentle’s display of two (2006 & 2007) COLOUR cameras.
9 Steve Ostler’s rotating shutter apparatus for 3D reception.
10 Laser images from ambient light illuminated photograph (J. Jago)
11 Dave Gentle photographed during demonstration period.
12 Denis Asseman demonstrating his replica "Octagon" receiver, an American GE model.

Volume 33 Number 1   2007
[3] Our Front Cover   Patrick de Scheemaeker's partly-constructed lightweight cog-wheel sync unit.
[3] A Visit to Helensburgh   by Kevin Hadfield and Mark Smedley.  Account of trip which found sites of J.L.Baird's earlier life.
[4] Why Edikow?   Comment on this method.
[4] An Edikow Machine  by Albert Noble   Animation@btinternet.com    Description of this method with some practical possibilities, but no actual diagrams.
[5] Nipkow Disc Hole Correction  by Peter Smith  G4JNU.  Clever mechanical method of modifying position of hole in disc with ball-bearing mounted on pliers, with photo.
[5] This Newsletter   Apology for reduction in newsletter size etc, caused by health problems.
[5] Copy Date for December Issue.   Latest copy date notice.
[5] Missing Sync pulse Detector and Inserter   by Peter Smith G4JNU.  Neat little design using 4538 dual monostable, with circuit.
[7] NBTV Amateur Radio Group    by Ted Hardy.  NBTV Saturday morning net and other transmission matters.
[7] My NBTV   by Brian Oliver.
[7] London to Pangbourn   Martin Maynard G8CIX has received NBTV pics from Vic Brown G3SDQ - 50 miles with interference problems.
[8] A Simple x2 Frequency Multiplier   by Peter Smith G4JNU.  Diode+CA3140 op-amp circuit to double line sync frequency for higher-resolution experiments.
[8] Progress on a 60-line Colour NBTV Monitor   by Vic Brown   Description of 350mm disc and revised scanning format etc, with photo.
[9] Local Mettings.   Notice of forthcoming local area meetings.
[9] East Midlands Local Meeting.    Meeting date, contact number etc.
[9] South-East Area NBTV Group Meeting.   Details with contact number.
[9] Ronnie Kay.  Note from Laurie Booth G4XEC on World expert on polarography after his recent death.  Some description of his many activities.
[9] The Bead Disc and After.   Notes on the bead disc, people who have tried it and sketch.  
[10] Club Disc Progress   Efforts in obtaining a commercially-made disc with photo of prototype under test in Peter Smith's workshop.  Cost will be around £36.
[10] A Radio Hint.  Good tip on reducing mains buzz on cheap "Wall wart" PSUs.
[10] Photomultipliers in practice.   Practical information on use of PMTs, with notes on precautions.
[10] Photo-News  (Numbered left-right, top-bottom)
       1 Eddie Greenhough with recently-made bead-disc projector, screen in foreground. 
       2 Eddie Greenhough, closer view of projector showing disposition of parts - note single LED.
       3 Denis Asseman at Convention 2007 describes precision Nipkow disc to spectators.
       4 Doug Pitt and others with  bead-disc monitor at Convention 2007.
       5 Kevin Hadfield with colour carousel at Convention 2007.
       6 Vic Brown and Peter Smith at December 2005 "Model Engineer" Exhibition.

Volume 33 Number 2
[3] Our Front Cover   Two stained-glass windows dedicated to J.L.B.   Photographed at Helensburgh by Kevin Hadfield.
[3-5] Colour Carousel (Four Quadrant) Scanner (Part 1)   by Kevin Hadfield.    Description of scanner and some circuit details.
[5] 30 Lines on a Tube   by Jeremy Jago.   CRT-type receivers for the 30-line Baird transmissions in the 30's.
[6] A 60-line NBTV Picture Source   by Vic Brown.   News of Gary Millard's software modifications for 32line/60-line version.  With instructions on how to adapt for the wider-bandwidth signal.
[6] Amateur NBTV Transmissions.    Details of transmissions and standards.
[7] NBTV Amateur Radio Group    by Ted Hardy.  Comments and possibility of forming a formal radio NBTV club.
[7] East Midlands Local Meeting   (Report)
[7] South East Area NBTV Meeting   (Report)
[8] The Hellschreiber   Mention of this scanning machine, with reference to Vol.8 No.1.
[8] Cadmium Again    Efforts by Michael Robertson  with CdS, with cell-testing circuit.
[8] Reception Report   from Jeremy Jago.   Reception of the Saturday NBTV net in Nottingham, with details of possible adaptations for better reception.
[9] Annual Subscription   Request for ideas from all club officers.
[9] Ideal Copy   Format for article etc.
[9] 2008 Royal Society Prizes for Science Books.   Details for entry to this competition.
[9] Copy Date for March Newsletter  8th February 2008, plus details of addresses.
[9] Photo-News  1 Kevin Hadfield outside Baird's house, Helensburgh.
     2 Bust of J.L.Baird on promenade, Helensburgh.  Improvements by local youth in the form of chewing gum were reported.
     3 Skilfully made aperture drum by Eddie Greenhough.
     4 Stained-glass windows at Helensburgh.
     5 Dave Gentle's glass block scanner (unfinished).
     6 Another view of Dave Gentle's glass block scanner.
All back-page photos in this issue are of exhibits and visitors at the recent Benelux meeting of the NBTVA, held at the Jan Corver Museum in Budel, near Eindhoven (photographs courtesy of Denis Asseman and Jo Ruffini).

Volume 33 Number 3
[3] Our Front Cover   Doug Pitt.
[3] Convention 2008 Saturday 19th April 2008.   Notice of Convention, with map and 'how to get there' instructions plus Convention-related information.
[4] Colour Carousel (Four Quadrant) Scanner (Part 2)   by Kevin Hadfield.   Further descriptions of scanner with some of circuits.
[7] Douglas Bryce Pitt (1919-2007) - Obituary. 
[7] Recollections by Doug's teaching colleague and NBTVA co-founder, Stan Kujawinski.
[9] Message from Iain Logie Baird
[9] Message from John Lydon
[9] Douglas "Dougal" De Haviland (1931-2007).   Note on Doug's enthusiasm and help for NBTV.
[9] Donations    If you wish to make a donation in memoriam, the following are suggested:
      Douglas Bryce Pitt: Leukaemia Research Fund (Reg Charity No. 216032) or the National Trust (Reg. Charity No. 205846).   US residents may make tax-deductible donations to the National Trust via the Royal Oak Foundation (www.royal-oak.org).
      Douglas De Haviland:  Marie Curie Cancer Care (Reg. Charity No. 207994).
[10] Inverting Amplifier   by Peter Smith G4JNU.   CA3140 op-amp circuit gives inverting gain with DC-coupled input referred to 0v.
[10] Progress on a 60-line Colour NBTV Monitor   by Vic Brown G3SDQ.    Now using 350mm disc, with some technical details.
[11] NBTV Amateur Radio Group    by Ted Hardy G3GMZ.   Reports of increased-range further contacts and two-way transmissions etc.
[11] Club CDs.   Note on all three club CDs.
[11] Larger Nipkow Discs  A limited number of 490mm laser-cut, 0.7mm thick, 32-line Nipkow disks is now available from club sales.  Cost is £20 + P&P - Vic Brown.
[11] Toothed Wheel Sync.   Patrick de Scheemaeker's report on his cog-wheel synchroniser, with further note by Jeremy Jago.
[12] Photo-News   1 Vic Brown's 60-line monitor rear view.
      2  Peter Smith's amateur TV transmitter.
      3 and 4 Patrick de Scheemaeker's cog-wheel synchroniser (two views)
      5 and 6 Marconi magnetic detector (two views).

Volume 33 Number 4
[2] Club Sales
[3] Denis Asseman    Obituary and tributes to Denis' outstanding work
[3] Newsletter    New format and its facility for new layouts, colour etc
[3] NBTVA Archive CD available soon
[4] Sync Separator & LED driver  by Peter Smith.   Simpler version of  Vol21 No.4 circuit
[4] Power LEDs   by Vic Brown.   Driver circuit for high-power Luxeon LEDs
[4] Luxeon LEDs now available from club sales
[6] Convention ‘08 report	Comprehensive description of a fine array of projects
[6] NBTV on the Web   by Chris Lewis.   Information on NBTVA website
[7] Salvaged Computer PSUs    Alternative uses
[8] Baird Home demolition    Bexhill home destroyed
[8] AGM ‘08 report    Reports from Treasurer, membership,Merchandise officers and editor,
Web Co-ordinator, Amateur radio co-ordinator, promotions, elections
[8] Club Nipkow discs	 Large discs available, but problems with Darvic-type discs
[8] NBTV Tape EQ using Negative Time	 by Graham Lewis.   Use of low-cost computer methods to cancel `LF droop`
[10] An Edikow machine, part 2   by Albert Noble.   Interesting experiments in cylinder-recording NBTV
[11] Tips  Kevin Hadfield's new use for phone cord 'untangle' device.   Alternative CRT connectors.
Lead-free solder comments by Jeremy Jago.
[11] Exhibition   Espace Ferrie Museum exhibition (closes 2009)
[11] Future Features    Future reports (hopefully) on members' work
[11] Competition	  How few components can YOU use to put a picture on a CRT?
[12] Photo news	1  Denis and Jackie Asserman  2  Peter Smith's off-air display,
      3  Dave Gentle, Peter Yanczer, Vic Brown and Peter Smith
      4  Peter Yanczer signs book for Phil Hunter
      5  Albert Noble's 'Edikow' unit - see article this and previous issue
      6 Alistair Cree with his Meccano large-disc monitor

Volume 34 Number 1   2008
[2] News items	East Midlands meeting Sunday 19th October
[2] Other regional meetings
[2] Death of Ted Hardy G3GMZ radio net controller
[2] What is a loan box?
[2] Complimentary subscriptions
[2] British Horological Institute
[2] Mihaly-Traub article forthcoming
[3] Conductive Glass   Peter Smith's discovery of conductivity of 'K-glass'.
[3] New Televisor PC Boards   by Vic Brown G3SDQ	  Two new pcbs available from club sales.
[3] Speed Sensor and Motor Driver   by Peter Smith G4JNU.   Circuit for new club pcbs.
[5] Droplet Televisor   by Kevin Hadfield.   Using water droplets as tiny lenses.
[6] Single Transistor LED Driver   by Klaas Robers   Gamma-corrected driver circuits.
[7] Sync in Sound	   by Peter Smith G4JNU.	 60Hz tone detector outputs 120Hz square, with circuit.
[7] Earliest 30 line CRT demo?   by Phil Hunter.   Text of 1933 'Television' articles.
[8] Cheap and Hard-to-get NBTV Components  by Keith Vickers.   What you can scrounge!
[9] Competition Entry — NBTV on an Oscilloscope.   Michael Robertson's small, easy circuit
[10] Luxeons, Photomultipliers and NBTV.   by Steve Ostler and Steve Anderson.   Description of camera and monitor for monochrome or colour.
[12] Photo page.   1-6 Images from the Ostler-Anderson camera system in this issue

Volume 34 Number 2
[2] Ted Hardy Tributes
[2] Local Meeting Report of NBTVA East Midlands meeting Oct 19th.
[2] NBTV by Phone   by Jeremy Jago.   Description of interfacing to phone lines.
[4] Screen Test — A JLB Biopic  from The Scotsman 10th October 2008
[6] Letter to Editor   from Malcolm Baird, commenting on Kevin Hadfield's idea (V34-1) on the 'Droplet Televisor' with further comment from Jeremy Jago.
[6] NBTV Tape Equalisation using Digital Signal Processing   by Graham Lewis.   Efforts to correct from-tape NBTV distortion, attempted solutions and their problems and a combined hardware/software solution.   Includes diagrams and circuits.
[9] 625 Line to 30/32 Line Converter - Update   by Peter Smith G4JNU.   Quartz frequency standard, with circuit.
[9] CD Players — a short review   by Peter Smith G4JNU.   Comments on performance of CD players when used for NBTV.
[10] Ripple-free Lamps.   Use a CFL as a cool alternative to a heavy-filament tungsten lamp.
[10] Unusual TV Principles.   by Jeremy Jago.   Unusual but apparently workable alternative NBTV methods.   Includes note on using an LCD display's lag in a standards converter.
[11] A Reconstruction Project by Phil Hunter.   Re-creation of 1930s type NBTV reception.
[11] Hollis Baird Sync Circuit   Some circuitry shown, with comment.
[12] Photo page   1 Ted Hardy at Amberley during the 2003 Transatlantic tests - see tributes on p2.
        2  Dave Gentle and Phil Hunter examine NBTV recordings at October local meeting.
        3  Phil Hunter's 1930s reconstruction (see p11).
        4  Close-up of Phil's disc 'visor with viewing lens.
        5  6.25Hz NBTV pictures phoned by Dave Gentle to Jeremy Jago (see p3).
        6  Peter Smith's Televisor using new club pcbs.

Volume 34 Number 3
[2] Annual Conventions April 18 Map with directions and hints on possible items to bring.
[3] News items     QRP Radio Rally - Sunday 14th June.   Mechanical TV helps win Turner Prize
[3] - Mechanical TV is part of art exhibit.   Two Remote Control Hints - programming and mods for universals.
[3] Line Photosensor arrays - Possible NBTV uses for scanning arrays.   Unilateral Mirror Drums - Mirror polygon source.
[3] White LEDs: The Revolution Continues - New, even larger LED arrays.
[4] More on LCD Screens for Down-conversion.   Problems and possibilities in using LCD displays and camera for fast-slow scan conversion.
[4] Dividing Plate   by Dave Gentle.   A professionally-made, high-accuracy tool for construction and adjustment of 32-line devices.
[4] Newletter Archive on CD-ROM Soon.   Completion near on Archive CD.
[4] Video Clamp & Buffer Amp, Mark 2   by Peter Smith G4JNU.   Simplified version of circuit in V28-2, with new circuit.
[5] Transmission Bandwidth Reduction   by Vic Brown G3SDQ.   Reasons why NBTV bandwidth cannot be usefully compressed for radio transmission and the use of vestigial sideband.
[5] Simple Mirror Drum Projector/Monitor Construction   by Dave Gentle G4RVL.   Details of how anyone, with patience and care, can make a mirror-drum.   Diagrams included.
[7] Brightness Correction for Oversized Holes   by Keven Hadfield.   Definitely from the 'oops! - how do I get out of this one?' category, description with basic details of a circuit to change output on a per-line basis.
[8-9] Edikow Machine, Part 3 - Synchronising   by Albert Noble.   Synchronising problems overcome with a powerful motor + a high-power 51Hz generator.   Definitely NOT battery portable!
[9-10] Reports from Australia   by Chris Long VK3AML.   Description of the 'Dynascan' machine, a mechanically-driven multi-LED large display for public displays/information.
[9-10] Description of Chris' hybrid valve/transistor 7 inch CRT monitor (5 inch pic?).   Info on possible use of portable devices for NBTV recording/playback with tried file formats and results.
Television Puppet Pioneers   Use for puppets for early TV testing and even broadcasting.
[11] Single-transistor LED Driver Built on MDF Board   by Klaas Robers.   Construction of the LED driver described in V34-1, with diagrams, construction and cautions when first starting up.
[12] Photo page 1-2   Elegant French replica exhibits by Roger Dupouy.   Picture in film image is 2100 pixels, 30 lines.
       3  Chris Long with Dynascan display - see p9.
       4  Drum monitor by Dave Gentle, made as on pages 5 and 6.
       5  Pictorial diagram of Chris Long's model for Australian Centre for the Moving Image's historical display.

Volume 34 Number 4
[2] NBTVA membership renewal reminder
[2] News of LA RADIOVISION Website   from Roger Dupouy - Video clips of 60-line machines etc.
[2] Left Hand, Right Hand - refers to frame scanning sense in Dave Gentle's mirror-drum article.
[2] Hints on the Club's 490mm Nipkow Discs - Notes on easier synchronising and reducing disc noise.
[2-3] NBTVA Convention April 2008   Full report on Convention.
[3] Archive CD    Now available.
[3] Television at Home   by Phil Hunter.   Further notes on his reconstruction project and future work.
[4-6] More Experiments with VSB   by Vic Brown G3SDQ.   Use of 2-pole crystal filters and ceramic filters to generate and receive vestigial sideband NBTV, with some circuitry, phase/amplitude responses and spectrum display.
[6] News (contd).   Sixty Years of amateur Television.   BATC 60th aniversary year.
[6] Great Scots who Changed the World   exhibition in the Museum of Communication opened by Baird's daughter.
[6] 32-line Tape Recordings on view   Chris Long has placed several transfers on You Tube.   Search >video>VK3AML
[6] Recycling CFL Bulbs   References to useful parts and use in radio and NBTV, with references to articles.
[6-7]  RGB Colour Bar Generator   by Peter Smith G4JNU.   Add-on unit to be driven from the triple waveform generator.   It produces six colour bars and black and white.   Complete circuit included.
[8] Simple Colour Televisor   by Vic Brown G3SDQ   Uses 3x Klaas Robers' drivers and stacked LEDs.
[8] Take One Glass Bulb...   by Jeremy Jago  Strange story of sodium glass photocells and their manufacture.
[9] TV Model: Australian Centre for the Moving Image, Melbourne, Australia   by Chris Long, Melbourne, Australia.
A replica NBTV Televisor for public display, with some notes on features and construction.
[10] Baird Television Co. Demo 1929   by John Saunders.   Press invitation letter and handout for Baird pre-broadcasting demonstration on (or shortly after) 25 September 1929.
[11] Analogue Compatible Colour   by Dominic Beesley - see http://www.authorityfile.co.uk/NBSC/   Colour-compatible sysem, tests, results and conclusions (see photo page). 
[12] Photo News 1  NBSC in 32 vertical lines, software rendering with diamond aperture.
         2  Nipkow disc monitor showing colour bars.
         3  Nipkow disc monitor showingNBSC test-card.
         4  Off-air BBC2 ident.
         5  Off-air NBSC colour bars.
         6  Vic Brown's simple colour adaptor - see page 8.
         7  John Saunders M1BAI shows NBTV to Flight Refueling Amateur Radio Society.
         8  Chris Long's ACMI demonstartion - see page 9.
         [10,11]  Two views of Phil Hunter's progress in authentic reconstruction of a UK Baird home set-up - see page 3.

Volume 35 Number 1   2009
[2} Local Meeting, Nottingham, Sunday Oct 25th   Address and directions for travel given.
[2-3] The MZTV Museum, Canada, reopens   Remarks by Malcolm Baird at the Grand Reopening, 550 Queen St. E.,Toronto - July 20th 2009.   Full text of the speech.
[3] Universal Video Clamp & Sync Inserter by Peter Smith G4JNU.   Simplified version of an earlier design with description and circuit diagram.
[3-5] Gamma at Breaking Point   by Steve Anderson.   Elegant circuits with diagrams and response curves.
[5-6] Baird 240 line Television on Trial.  Exploring one briefly used UK standard (Nov 1936 to Jan 1937)
[6] A Mechanical Scanner in the 405 Era   by Jeremy Jago.   Use of the Jeffree cell to modulate light source for a display from 405-line.
[7-9] NBTV on 461 Terahertz   by Steve Anderson.   Use of a laser pointer to transmit NBTV and receive it with a photocell.   Good description with photo, circuits and waveforms.
[9-11] The Mihaly and Mihaly-Traub Mirror-Drum Systems   by Ian Logie Baird, Curator of Television, National Media Museum.
Extensive description with photos and diagrams.
[11] Making a Synchronous Motor   quoted from Fractional Horsepower Electric Motors by C.G. Veinott (Westinghouse Design Engineer)   How to modify a motor to make it operate synchronously.
[11] NBTV Displayed at BATC’s 60th Anniversary Gathering.   Demonstration by Vic Brown G3SDQ and Peter Smith G4JNU.
[12] Photo page 1  John, Peter and Vic at the club stand, BATC 60th event, June. See page 11.
        2  Lecture-demonstartion gear at the BATC event - see page 11.
        3  Patrick de Scheemaeker'sdrum prior to fitting mirrors.
        4  Patrick de Scheemaeker and a recent Nipkow disc 'visor.
        5  Madeleine Carroll, 180-line image from Baird test film - see page 5.
        6  Baird test film reproduced on BBC 240-line system - see page 5.
        7  J.H. Jeffree's 67 steel ball-bearing line scanner, 1938 - see page 6.
        8  'One third' mode 625 experiment on oscilloscope - see page 7.

Volume 35 Number 2
[2] News items   This issue reaches you later than planned, due to a serious lack of material from readers
[2] Commemorative Radio Event by G2TV   on the 80th anniversary of Baird's first TV broadcast from BBC station 2LO.
[2] Local meeting in East Midlands   Report on meeting of Sunday October 25th at Nottingham.
[2] News from Roger Dupouy   News on the progress of his replica French Televisor, with on-line videos at http://www.youtube.com/watch?v=GJH9J5Qoxf8 and 
[2-3] Three-dimension TV Transmissions   Experimental 3D transmissions were made recently by Channel 4, using full-contrast main image and reduced-contrast left and right images superimposed.
[3] Television at the Temperance Hall   Research is under way on a large public show of Baird Television given in Derby, UK from February 1st to 11th, 1933.
[3] Simple Motor Speed Controller   by Peter Smith G4JNU.   Use of LM317 voltage regulator ic as current regulator to make speed impervious to supply and motor resistance, with circuit.
[3-4] Optomechanical Converters  by James Hawes AA9DT.   Some history on early American TV standards and an ingenious method (with picture) to convert 120-line signals to 60-line pictures on older equipment.   The possibility of an optomechanical NTSC converter is suggested, but seems impracticable.
[5-6] The Mihaly and Mihaly-Traub Mirror Drum Systems.  Part 2: The Traub modifications   by Ian Logie Baird, Curator of Television, National Media Museum.   Comprehensive article with plenty of information on early scanners, photos and many references.
[6] Ambient Light Sensors   by James Hawes AA9DT.   Experiments for potential use as LDR-replacement NBTV sensors - not much luck, as the one tested seems VERY insensitive.   JMJ found data from web-search - not very promising for this particular specimen, but who knows?
[7] Photocell Head Amplifier Reviewed   by Vic Brown G3SDQ.   This is the latest version of the original circuit by Patrick de Scheemaker, incorporating output DC level (setwith R2) stabilization  and improved frequency response.   C5 can be doubled (preferably in series with 120R) for a useful 3dB top-end lift - Keith V.
[8] Vestigial Sideband FM Experiments   by Vic Brown G3SDQ.   On-going experiments to use an amateur radio VHF-FM sytem with the old, wider (approx 12.5-16kHz) filters for NBTV.   N.B.   This is impracticable with the modern filters, which are about half the above bandwidth.
[8] Domestic Mechanical TV (see photos on front cover and rear page).   More of Phil Hunter's mechanical TV restoration project is described, with the circuit of the transformer-coupled, DC biased flat-plate neon lamp.
[8-9] Reducing Regulator Dissipation and heatsink size   by Steve Anderson.   Reduction of power dissipation in voltage regulators by diverting it to resistors, saving heatsink size.   With circuit diagram.   N.B.   Heatsink thermal conductance increases as the SQUARE of the area, so these mods can save a lot of metal.    P.S. Another trick is to use a second rectifier in series with a resistor, to feed lower-voltage regulators.   This prevents the reservoir capacitor charging up fully on heavy load, reducing total heat - K.V.
[9] Photosensor Speed Checking by Square Wave   A simple CMOS circuit is shown to drive a white LED at approx 2kHz for photosensor and pre-amp checking i.e. 5th harmonic is at top-limit 10kHz.
[10-11] Flicker   by Jeremy Jago.   Comprehensive article on visible flicker and ways to reduce its subjective effects - well worth reading for original info.
[11] One Day in l926   Description of Baird's first TV demo at Frith Street on 26th January 1926.
IMPORTANTLY it also describes the attempts to speed-up photocell response, giving some hints we may well be able to use in today's circuits.
[12] Photo page 1  Chris Long's working demo at ACMI opening, September 2009.
        2  Daniel Gosson's new viewer using 12 inch disc.
        3  Phil Hunter's 19 inch disc televisor using USA flat-plate neon.
        4  Disc 'visor, see left, in home setup - note string synch.
        5 and 6  Imaged displayed by the televisor above, manually synched.
        7  Part of Stefano Bargiacci's vintage radio collection.
 
Volume 35 Number 3
[2] Annual Conventions April 3   Map with directions and hints on possible items to bring.
[3] Report on the 80 metre NBTV Net   by Vic Brown G3SDQ  The net takes place every Saturday morning starting at 7:30am.
Frequency is in the range 3700-3707 kHz, depending on interference.
[3]  Noise Reduction Filter   by Peter Smith G4JNU.   Solution to common-impedance coupling by using a mains transformer as an audio equivalent of the RF 'braid breaker'.
[3-4] Mercury Lamp as Modulated Light Source   by Phil Hunter.   Use of a mercury bulb to replace a flat-plate neon.
[4] Linear Timebase Oscillator   by Jeremy Jago.   Use of an op-amp voltage-follower bootstrapping a 555 timer gives a timebase with a very linear output.   With description and circuit.
[5] Simple NBTV-on-Oscilloscope  Adaptor - further notes   by Michael Robertson.   Small but useful modification to improve synch and also a correction to a component value mistake in the original article.   Also a tip from JMJ on using portable equipment on an insulated surface with the output wires transposed to obtain correct-polarity inputs.
[5] Inside a Barcode Scanner   by Jeremy Jago.   Description of operation of a scanner, with two photos, and possible future NBTV uses.
[6-7] Telerecording - The storage of television programmes using motion picture film   by Edward Nowill.   Hectic adventures for the masochistically inclined (aren't we all?!) as Edward attempts to record NBTV on film, with problems and tweaks along the way.
[7] A Different Angle   by Jeremy Jago.   Interesting article on early TV and film sound recording, with the invention by Will L. Day of the slant azimuth recording technique for higher signal per film length/speed.
[8-9] A High Definition Large Screen Mechanical Display   by Steve Ostler.   proposals for a mechanically and optically complex display, with proposed improvements to improve performance and safety for this mighty mechanism.
[9-10] Scanned Images using Simple Apparatus   1931 article by D.R. Campbell with introduction by Jeremy Jago.   Description of 30-line scanning with photos and diagram of scanning and lens system.
[11] More Component Reclaims   Yet more sources of cheap, free or unusual components.
[11] Remote Control Testing.   Useful tip on using infra-red controlled hand-drier to check if IR remote is transmitting.
[11]  French Historic Television Exhibition During April.   To accompany the poster in Photonews and the front cover picture, Roger Dupouy sends news of the Radio and Television 1930 exhibition from 1st to 24th of April 2010.
[12] Photo page 1  Roger Dupouy's poster for forthcoming exhibition - see also page 11.
        2  Phil Hunter's crystal set followed by choice of valve or SG Brown carbon amplification (wood case on lower right).
        3  From Phil Hunter's video talk CD, using Gary Millard PC program and webcam.
        4  In the second he holds up a cigar card of 1932 Austin 7 Swallow.

Volume 35 Number 4
[2] Membership Notes  by Dave Gentle, NBTVA Membership Secretary and Treasurer.   Notes on overall membership and distribution, membership payments, costs, new member facilities and cut-off time for non-payers.
[2] 'The Invention of Television' presentation given at the National Film Theatre, South Bank, London.
[2] Promoting NBTV to Radio Amateurs   Member Alan Jones G8AZT gave a talk on NBTV to the Thornbury and South Gloucestershire Rado Rally.   A presentation of this kind is very valuable when introducing NBTV to radio amateurs and construction enthusiasts.
[2-3] Synchronisation by Loose Coupling   by Kevin Hadfield.   Based on what could be called 'The Huygens Effect'  the small coupling between two systems at similar speed or frequency can cause them, over time, to pull into perfect synchronism.   Kevin goes into this effect in detail and its practical implications.
[4] An Improvement to Triac Mains Controllers   Simple, cheap mod to a standard triac controller can make it suitable to control both commutator and shaded-pole motors.
[4-6] Eureka I’ve Found It!  - The Missing Pulse!   by Steve Anderson    Very elegant but inexpensive circuit to extract the 'missing sync' pulse, with additional logic to generate perfectly-timed line pulses too.   Full description with scope traces, circuits and photo.
[7] Replica Baird 20 inch Disc   by Peter Smith G4JNU.   Excellent results from tests on a replica Baird 30-line 20 inch disc.
[7] Progress on VSB FM Transmissions   by Vic Brown G3SDQ.   The test at the Convention in April showed up problems with receiver sensitivity and alignment, but they were overcome and eventually good results were obtained.   Further work is in progress to improve the system further.
[7-9] Reconstructing Volumetric TV: Could you help?   Appeal for expertise for a potential reconstruction project from Dr. Malcolm Baird and Professor Barry Blundell.   Based on Baird's work in 1932, an attempt could be made to re-create his 'volumetric' 3D TV.   Some details of the process are given.
[10] Mechanical Sync by Oscillator   Use of line video content to achieve line sync, but not framing. Method from the 1930 German Telehor receiver.   Description and circuits.
[11] Baird Talk at Box Hill   Talk on Baird's activities from the Swiss Cottage at Box Hill, The installation of the blue plaque on 1st December 1988 and a photo of John Weller setting up the 30-line demo display.
[11] NBTV Forum Website http://www.taswegian.com/NBTV/forum    The NBTVA and the Forum have amicable relations but have always been separate from one another. As so many Club members are also Forum users, the Newsletter for space reasons avoids routine duplication of sizeable matter already on the Forum.
Photo page 1  Dave Gentle's flying-spot scanner with reflected-light pickup.
       2  Kevin Hadfield's drum display using commercial LED strip.
       3  'Stooky' via FM VSB demo by Vic Brown and Peter Smith - see report on page 7.
       4  A timely (subs) reminder from Dave Gentle's LED fan.
       5  Graham Hunt, left, views Phil Hunter's disc 'visor with experimental synchroniser by bike dynamo, 8-pole at 50 Hz.
       6  Receiving side of VSB FM demo above.   Oscilloscope verifies clean sync waveform.
       7  Alistair Cree's digital CRO driver.
       8  Volker Mohr with new disc viewer.
       9  Alan Jones G8AZT (see page 2) and compact televisor.
       10  Peter Smith at J.L. Baird's early premises at 22, Frith Street. Soho, for BBC tv 'One Show' item, aired June 2010 - see also front cover.   (Building is now an Italian restaurant, World Cup flags removed.)
       11  Used in the same item, Peter's hand-turned demonstrator of fundamental TV principle - a torch shone onto opaque cross left, produces scanned image right via modulated light.

Volume 36 Number 1   2010
[2] East Midlands Local Meeting - Sunday October 24.   Comprehensive 'how to get there' instructions.
[2] ‘The Invention of Television’  event reviewed by Don McLean.
[3] Disc Construction for Beginners   by Alan Jones G8AZT.   Construction of a small Nipkow disc using a net-sourced pattern (two sources given).   Sufficient info is provided to make and mount the complete disc.
[4] 30-line Sync Gear by Peter Smith G4JNU.   The photo shows the latest stage in Peter's authentic rebuilding of an original Baird 30-line Televisor with newly-made parts.   This stage is the 'Toothed Wheel Synchroniser'.
[4-6] Simulating Phonic Synchronisation   by Karen Orton.   This comprehensive article is based on the interesting premise that the torque generated by a phonic wheel changes phase as a tooth passes a pole face.   Motor speed and phasing can be controlled with good accuracy from this signal.   An operational description and block diagrams are given.
[6-8] A Look at 240 Lines   by Vic Brown G3SDQ.   This is a review of the Baird 240-line TV standard and experiments to produce 240-line pictures at both 25Hz and also 50Hz frame rates for flicker reduction.   Results are shown in two photos and possible recording methods considered.
[8-9] Linear FM Detector   by Peter Smith G4JNU.   The circuit uses an HEF4046 CMOS PLL for very linear demodulation and is followed by an audio equalizer and inverting buffer amplifier.   The article includes circuit diagram and circuit description.
[9] A Part-Mechanical, Part Solid-state 625 Monitor   by Karen Orton.   Description and mechanical diagram of the scanner, with a broad description of operation of this long-gone project.
[10] Newsletter Notes: Editor suffered fatal computer breakdown, delaying publication.
[10-11] The GW1XVC Televisor   by Steve Ward.  Adventures in making a homebrew Nipkow disc and putting together a monitor.   Conversion of other video sources to NBTV standard via software and eventual success in transmitting MF NBTV signal over a short distance with good quality.   Circuit diagram of the transmitter and two useful web addresses are also given.
Photo page    Eight photos from the televisor project of Steve Ward - see his article on page 10.
       1  Steve's Televisor under construction.
       2  View with panel unclipped - note compound viewing lens and light shield.
       3  An early image using the home-made disc.
       4  'Stooky Steve' via 100 foot radio link.
       5  Downconverted TV image displayed.
       6  Club pcbs for motor control and video.
       7  Detail of hub and motor mount before disc fitting.
       8  Home-ground pulse sensor  (metal-can transistor with top ground off - brutal!)

Volume 36 Number 2
[2] Benelux Convention in Rotterdam - Sunday 14th November.   Museum exhibition with presentation by Klaas Robers and exhibits by a number of amateurs.
[2] East Midlands UK Meeting - Sunday 24th October.   Hosted by Zoe Bremer.   Equipment brought along included Eddie Greenhough's bead-disc monitor, Eddie's EPROM test image generator, Dave Gentle's back-projection monitor and an Acmade film editor's viewer was shown.  Phil Hunter brought a range of contemporary historical literature and Chris Lewis demonstrated check of an IR remote using phone camera.
[2] A Note on Club Membership.   ALL membership dues are payable in January each year.   Any new members are sent all the issues for the year they join, so that even if dues are payable in much less than a year, they still get ALL of the year's newsletters.
[2] Replacement Motor - a note from Peter Smith.   A replacement has been found for the now-discontinued motor and there are a few minor mods to the club motor-driver pcb to ensure stability.
[3-4] A Single-Chip NBTV to Video converter   by Karen Orton.   This circuit, with associated firmware, converts an NBTVA standard signal to small 625-line video display on a normal monitor.  The operation is described, with a full circuit diagram.  UPDATE:  Karen advises Klaas Robers has improved sync by reducing the 3M6 resistor to 1M.
[4-5] Add-on Neon Driver   by Peter Smith G4JNU.   This design can drive either a flat-plate neon or a replica light source of 55 series-connected LEDs.   Operation is described, with circuit and use of 350 VOLT SUPPLY -CAREFUL!
[5-6] A Pioneer Vision-Mixing Aid   by Phil Hunter.   Photo of the BBC 30-line control room, including a caption scanner.
A method was developed to fade from caption to picture or another caption and back again via a blank screen.
[6] Update on Commemorative G2TV Article   by Phil Hunter.   Significant background information to comments in a previous article in V35-2, page 2.   Here are two pieces of original documentation, with description and five photos.
[7-9] Eiffel Tower Television   by Phil Hunter.   Based on an article from 'Television' September 1936, this is a description of the French TV system of that era, accompanied by photos of some very nice equipment and a French young lady. (See also V14/1 p5)
[9] lnfra Red Digital Photography   by Phil Hunter.   Use of IR light sources  with an inexpensive digital camera to obtain IR images.
[9-10] Beyond the Visible: Baird’s lnfra Red Experiments   by Jeremy Jago.   Equipment used for the 'Noctovision' experiments and also some educated guesses at the type of detector cells used, which may also have been used in visible-light experiments.   Also comments on some cameras being able to see through mist far more easily than the human eye.
[11] 30 Line Seasonal NBTV Crossword.   It's all right mother, they're all polite technical words - honestly!
[12] Photo page 1  Display at Rotterdam exibition - see page 2.
      2  Peter Smith's restored Marconi magnetic detector demodulating an AM radio station.
      3-4  Eddie Greenhough's bead monitor in action and showing beads - see page 2.
      5  Peter Smith adjusts his Marconi detector.
      6-7  New 30-line televisor Club disc tried out by Phil Hunter, with early result.
      8-9  Infra-red digital photos by Phil Hunter - see page 2.  

Volume 36 Number 3
[2] Convention Saturday April 2nd, Loughborough University.   Map and how-to-get-there instructions for road and railway station via the university shuttle bus.   Bring something to look at if you can.
[3] Notes from the Club Sales Officer, Vic Brown.  Availability of precision-cut discs in various sizes and the possibility of the club having mirrors laser-cut.
[3] Missed a newsletter?  If you did not receive Vol 36-2, posted in January, please contact Jeremy. <jeremy@nbtv.org>
[3-5] An LCD NBTV Monitor   by Karen Orton.   PIC-based NBTV driver with a Lascar SP5-GFX1 LCD display.   Software pixel dithering gives 16-level pseudo-greyscale on what is basically a 64x128  on-off display.   Description of operation given with full circuit diagram.
[5] Battery Charging Hint   by Jeremy Jago.   Use of old transformer secondary as inductor to give reasonably constant-current charging.
[6] Baird Motor Supply   by Peter Smith G4JNU.   Use of an LM317T regulator to control a 50 volt motor.   A split supply is used to overcome the LM317T's 40 volt max limit.  WARNING – Circuit drawing error.   The input pin of the LM317T should connect to the output of the rectifier at the point marked '35V' and NOT to the AC input. The corrected circuit diagram was published in the next issue (36-4).
[6-7] Useful High-current Power Supplies   by Jeremy Jago.   Use of PC PSUs and a simpler circuit than the one in V33-4.
[7] NBTV Over HF Radio   by Vic Brown G3SDQ.   Use of 30 lines, a slower frame rate and shorter picture to bring bandwidth down to 5kHz + 1kHz for a VSB transmission.    Reception is problematical as filters cause severe (and individual) phase distortion.
Vic proposes the approach usually used for DRM reception down-convert to ca. 12kHz and use DSP for filtering, preferably via a computer's soundcard.
[7-8] 625 In . . . 32 Out   by Steve Anderson.   Consideration for a replacement for Peter Smith's standard converter, with components more easily available today .
[8] NBTV Winter Projects: Rx/Tx Receive & Transmit via Light Projection   by Dave Gentle G4RVL.   Recording NBTV and audio to disk etc.   Low-power lasers (red or green) can give a good display and should also be transmissible over significant distances.   Use of LIGHT feedback to enhance the camera signal - gives excellent results.   Possibility to send/receive NBTV via 'Skype'?
[9] Printed Circuit Board Tracing   by Jeremy Jago.   Use of (eg) a computer scanner to see tracks 'through' a pcb.
[10] Crossword Solution
[10-11] Mirror-Screw Reinvented?   Rotating LED decorations.
NBTV Newsletter Supplements launched.   Supplements to the newsletter may be issued i.e. additional articles, projects, information files etc.   This allows anything to be distributed without the limit imposed by size of the postal newsletter.
[11-12] Television at Radiolympia ‘34   by Phil Hunter.   Description of the 1934 exhibition, makers, equipment, standards etc.
[12] Baird Crystal Palace Transmissions   quoted from 'Television' Magazine, February 1934.
Specifications of improved transmitter power, wavelengths, picture standards.

Volume 36 Number 4
[2] NBTV Annual Convention Report   Many items were on show, with good attendance.   Among the items were Karen Orton's 32-625 line converter and LCD viewer, demonstrated by Eddie Greenhough and Chris Lewis.   Mechanical viewers by Graham Hunt and Volker Mohr.   Alistair Cree's 32-line scope display with digital scans, Phil Hunter's recreation of a 1933 Ediswan Receiver used thyratron scanning and Jeremy Jago flying-spot scanned an LCD display by CRT.   Dave Gentle sent TV via a green laser directly to his camera-monitor.   Kevin Hadfield showed his colour carousel LED displays.   Don McLean replayed his restored phonovision recordings and Peter Smith's Televisor showed series signal-driven toothed-wheel sync.   Also Peter gave a replay of the TV play 'The Man with a Flower in His Mouth'.
[2] Annual General Meeting 2011.   Reports of great interest in the latest PIC-based designs, NBTV demos at various events, early receiver design research is informing reconstruction projects.   The Club Handbook is updated and original ideas are in trial for NBTV in amateur radio.
[2] Membership.   Dave Gentle circulated reports on membership and accounts, reports now about half of member pay by PayPal.   The Club website, managed by Chris Lewis and Klaas Robers, is our main recruiting tool.   All club officers were re-elected.  Cyber membership like the BATC was discussed and due to considerably increased postal costs Subs rises were voted in.   New rates are as follows:  UK £6, Europe £7, rest of world £9.
[2] Publicity and Promotion   Various contibutions were acknowledged, Martin Maynard in production, Chris and Klaas on the website, possible upgrade of the Wikipedia entry by members, John Weller and Alan Jones giving presentations.   Jon Weller and Don McLean run periodic special event Baird  amateur radio stations.   The NBTV HF net chat continues on Saturday mornings at 7:30 am with Vic Brown and Peter Smith + any others on 3700kHz +/- depending on interference.
[3] Merchandise.   Club Sales Officer Vic Brown reports steady sales, but takings down compared with the NBTV Archive CD sale 'surge'.   He suggested the NBTV Club Handbook be also sold to non-members.   New motors found for the Club Televisor kits.    New 'Dome' type cells cannot be obtained and substitutes are being urgently sought (preferably at reasonable prices!).   Mirror screw components are under consideration for sale.   A little more 'Darvic' sheet has been located and others are available but new good sources are sought.
[3] Information Listing   Peter Smith observes many members hold useful information and proposes a central list of who has what and where for the information of all members..   YOU may not think your info is important, but it's surprising how many others could be needing it.
[3] A Note on Plastics   Difficulties in obtaining and working plastic disc material and its necessary characteristics.
[3-4] A Single-Chip Camera Converter   by Karen Orton.   This PIC-based converter is not quite perfect, but does a remarkably good job for cash outlay and relatively simple construction, compared with the multi-chip (but perfectly functional) older designs.
Circuit diagram is shown, with description of operation and suggestions are included for further uses.   PIC hex file is available from Jeremy Jago.
[5] 625-line Video Coupling Survey   by Karen Orton.   A number of items are documented, with output coupling method and sync levels.
Note on NBTV-625 Line Converter.   Karen advises Klaas Robers has improved sync by reducing the 3M6 resistor to 1M.
[5] Club Stall at UK Midlands Event   Sunday, June 10th at Alfreton.   Club contingent ran a demo stall at the rally jointly organised by South Normanton and District ARG and the G-QRP Club.  32-line recording and replay were demo'ed, with mechanical, analogue and digital displays, plus quite a lot more -see article for participants and other equipment.
[6] Straightening a Warped M.U.T.R. Disc   by Alan Jones.   A method is described, with diagram, to use heat and compression to restore a warped disc.
[6] Baird Motor Supply Correction.   The input of the regulator should go to the rectifier output marked '35V' and NOT to the AC input.
[6-7] Isolated Current Multiplier   by Peter Smith G4JNU.   This circuit converts a high-voltage isolated LED signal to one suitable to drive an available 50mA meter via a low-voltage amplified interface.   Circuit diagram included.
[7-8] Tx/Rx NBTV Signals via Light Projection, Pt 2   by Dave Gentle G4RVL.   A green laser was used at the Convention to beam a signal over 4m (but could be MUCH further) to the disc camera, where it was picked up by the camera sensor, though a seperate photo-sensor could be used to relay to any monitor.   A photo, mechanical diagram and circuit of a simple beam modulator are shown.
[8] Obituary: Antony Kamm, co author of John Logie Baird: a Life.
[8] Colour from a 60-line Mirror Screw   form Roger Dupouy - see site:  http://la-radiovision.fr.   Use of LEDS and condensers to generate lines of colour - display on youtube.
[9] LCD Devices as NBTV Signal Source   by Jeremy Jago.   Use of LCD displays and their low-flicker displays give great advantage for NBTV purposes.   Possibilities of a number of LCD devices are examined, including laptop screens and video projectors.   A flying-spot scanner using an LCD screen is an experiment in progress.
[10] Filter Design   by Vic Brown G3SDQ.   Restricting signal bandwidth, particularly for radio transmission, can be a tricky problem.   TV signals are very susceptible to phase distortion and Vic uses Texas Instruments software to design a filter with minimal amplitude and phase distortion.   Calculator screen is shown.
[10-11] Disc Production using O.H.P. Transparency   by Karen Orton.   Use of a printer resolution of up to 1200 dots per inch gave an accurate printout - eventually - after a lot of ink was used.   Light leakthrough problems still persisted a little and the whole disc was stiffened and light-proofing improved by a card backing.
[11] Computer Televisor   by Graham Hunt.   Use of a reproduction Queen Anne cabinet to house a televisor made up largely from parts of a discarded computer - see photo on page 12.
[12] Photo page 1  Convention: Graham Hunt's Computer Televisor - see page 11.
       2  Convention: Alistair Cree's CRO driver using digitally-generated sawtooth.
       3-4  Image on 19 inch disc by Eddie Greenhough, and at its center, the monitor's car fan motor fixing.
       5  Jeremy Jago's LCD and CRT unit - see page 9.
       6  Club display at Alfreton QRP rally, June - see page 5.
       7-8  Karen Orton's mirror-screw inspired hatpin scanner - more details in next issue.

Volume 37 Number 1   2011
[2] NBTVA Local Meetings Oct 22-23.   Southern UK local meeting will be hosted by Peter Smith in Reading, Berkshire.   Please phone in advance - 01189 477 573.
[2] East Midlands and North UK meeting.   Hosted by Zoe Bremer at 1, Burnwood Drive, Wollaton, Nottingham NG8 2DJ, 2pm-6pm.
Bus/tram travel instructions included.
[2] Ally Pally 75 Seminar   on October 22nd at the National Media Museum, Bradford, West Yorkshire, UK. (formerly the NMPFT)
Ian Logie Baird is hosting the event celebrating the 75th anniversary of the world's first high-definition TV service.
[2] Club Scanning Discs   Club stocks of Nipkow discs are nearly exhausted.   Vic Brown has successfully prototyped a new 386mm (15in) disc for members who prefer a smaller size, but production is delayed by factory workload.   The new discs can be supplied as one-offs by another supplier at £30.80+£3:71 P&P in UK.   Samples of 'Darvic' substitutes are under test.
[3-4] Mirror Screw - ‘Kerplunk’ Construction   by Karen Orton.  Named after the game, this astonishing device uses polished hat-pins instead of mirrors!   Construction details and photos are shown.
[5] Baird Speed Sensor   by Peter Smith G4JNU.   The included circuit diagram shows a CA3240 used as a low-Q 375Hz filter, followed by a Schmitt trigger to give a clean output pulse from the small output of the toothed wheel.
[5-7] Two-Colour   This comprehensive article documents the remarkable results which can be obtained using only two colours and is a must-read.   Graham Hunt's experiments are promising good results when correct parts are obtained.   Phil Hunter gives historical info on colour TV progress.   Further impressions from Jeremy Jago, accompanied by coloured pictures, show the surprising quality which can be achieved.
[8] Dimensions for Reconstructors   USA member Byron Ake measured the case of the original Baird Televisor at the Early Television Museum, Hilliard, Ohio.   He has supplied a measurement diagram (shown) and has also supplied a series of close-up pictures showing details of the case.   These will be placed on the Member's Website for permanent reference.
[8] Innovators Beam TV to the Thirties   by Brendan O'Malley from Queensland Courier-Mail of November 7-8 2009.   Queensland's first NBTV broadcasts were by a doctor in the mid-30s - details given in the article.
[9] Motor Control Theory for NBTV Display supplement.   Available on the member's website or on paper by request, Karen Orton's article on motor control design, including Nyquist plots.   Also available is Karen's thoughts on the 4046 PLL and its uses.
[9] Improved NBTV 0scilloscope Display   Michael Robertson has further improved his winning entry in V34-1   The improved circuit is shown here, with added comments.
[10-11] A Visit to Hastings   by Kevin Hadfield and Mark Smedley.   An account of a visit to Hastings Museum and other places of interest, revealing an array of Baird history.
[12] Local NBTV Demonstrations   corrections to accidental mis-reporting.   Alan Jones G8AZT was in fact at South Gloucestershire Radio Rally.
[12] A Powerpoint Presentation   Alan's club amd rally talks are enhanced by a Powerpoint presentation he has created.   He has kindly suggested that the club make a copy available to any member who wishes.
[12] Photos 1  Club monitor recently completed by Karen Orton.
                    2  Museum Baird Televisor pictured by Byron Ake - see page 8.
[2] Australian NBTV Tape Recordings Restored   See http://www.youtube.com/watch?v=HYOmHzkkYV4
Member Chris Long VK3AML writes of uploading experimental 32-line videos he made in 70s and 80s using a flying-spot scanner.   They are converted into compressed .WMVs - click the above URL.   Thanks to Gary Millard in Sydney, we can reproduce these videos as web-compatible video clips.   Two photos shown of Chris in 70s-80s when he was younger ....weren't we all?

Volume 37 Number 2
[2] Annual Convention April 14th   Late confirmation of Convention time and place.
[2] More about Two-Colour Television.   Member James T Hawes writes:  Thanks for the two-color TV article - I'm webmaster of a two-color site   http://www.hawestv.com/mtv_2color/mtv_2color.htm    James goes into visual effects used by other pioneers.
I offer a page about adding color to mechanical TV (MTV) sets at http://www.hawestv.com/mtv_2color/mtv_colorize.htm
This section of my general FAQs answers questions on color MTV   http://www.hawestv.com/mtv_FAQ/nipkow_FAQ.htm#colorize
[2] The Mirror Screw   Definition of the mirror screw.
[3-5] A Mirror Screw Project   by Vic Brown and Peter Smith.   This article demonstrates the extreme precision - by amateur standards -  needed to make good mirror screws.   Every stage of the production of the mirrors is described, with photos.   Alignment is also described and also drive and sync methods.
[5-6] Universal Shaft Coupler   by Peter Smith.   The use of an ordinary spring, then a homebrew custom one, to form a flexible, non-slipping drive coupler is described, with photo.
[6-8] An NBTV Timing Corrector for Home-made Discs   by Karen Orton.   This device (demo'ed at the NBTV Convention) is the answer to a disc-driller's prayer.   It will individually change the timing of scanning lines from a mis-drilled disc and level-up the displaced horizontals.   The top and bottom of the display will be a little ragged, but the picture itself is level.   Unfortunately, it is not possible to shift line spacing by this method, but it can give a huge improvement to many home-made discs.   The circuit uses a PIC and a fast ADC and though operation is complex, construction is reasonably straightforward.   Full circuit, operation, setting-up instructions and photos are included.
[8] The NAFloop Receiving Loop   by Keith Vickers G1NAF.   The prototype  was 'NAF' - looked 'orrible, but worked well.  *Unfortunately*  the 'beam effect' was caused by the coiled-up 5m cable used on the prototype and vanished when changed to 1m.   However, adding capacitance from one end of the toroid primary may restore it.  N.B. Use a FERRITE toroid -iron dust has poor coupling.   P.S.  It was found that most of the wide-spaced turns could be shorted out to hear 7MHz band and a series inductor allowed passable coverage down to MW.
[10] Obituary - Professor Russell Burns   with biographical summary by Keith Thrower.
[10-12] Simulated Motor-Case Synchronisation   by Karen Orton.   This device uses a PLL and a PIC to give line and frame sync pulses which can be shifted in phase in small increments, allowing the picture phase to be adjusted over a very wide range. Circuit diagram and full description are given.   
[12] The Synchromat Mechanical Synchroniser   by Phil Hunter.   This old but remarkable unit synchronises a film projector to the speed of a tape recorder, using a loop of tape from the recorder, via hardware, to an electrical control of the projector motor.
The article gives a full description - with photos - of how it works and the possibility of using it for control of NBTV mechanisms.

Volume 37 Number 3
[2] Annual Convention 2012 - Saturday April 14th at Loughborough University.   Map, road, public transport directions given.   Requests to bring something of interest to other members and Membership reminder.
[3-4] A Simple NBTV Pattern Generator   by Karen Orton.   This PIC-powered (what else from Karen?!) circuit gives six monochrome patterns in various resolutions, the standard quartered NBTV testcard and greyscale bars.   There is also variable frame rate and a built-in light source, making this an extremely useful setting-up instrument.
[4-5] Mirror Screw Line of Light   by Peter Smith G4JNU.   This is a light source for the previous mirror screw project.   16 LEDs on a 12v 200mA supply are used to generate a line of light.   This design avoids the difficulties of precisely grinding and polishing a perspex strip by using two mirrors and a diffuser strip.
[6] An Experiment:  Putting the Mirror Screw onto a Disc   by Karen Orton.   A hub and shiny hatpins, assembled into a restraining case (to protect an operator!) are assembled to make this interesting device.   Results of this relatively crude prototype are rough, but certainly prove the principle.
[6-7]An even cheaper Loop Aerial   by Keith Vickers G1NAF.   Very cheap, quick and dirty untuned, wideband, loop aerial suspended in roof space to receive the Saturday morning NBTV net.   No-tune operation usable from  MW to lower SW bands and still significant rejection of mains-born noise.
[7]-8 Using Audio Amps as Scancoil Drivers   by Karen Orton.   Descriptions and circuit of line and frame drivers using TDA2003 power i.c.s are shown.
[8-9] Programme Material for NBTV   by Jeremy Jago and Peter Smith.   Finding sources of programme material suitable for NBTV i.e. bold resolution, some movement (but not out of frame!) and suitable contrast/greyscale.
[910] NBTV Retro - An NBTV Simulator   by Karen Orton.   This is a demo device to output a pseudo-NBTV picture to a standard TV set.   Full circuit is given, with description and a photo of the actual display is shown.
[10-12] Mail-order Mechanical Television - 1929   by Phil Hunter.   This article is about the contents of a mail-order catalogue by Barawik Co, Chicago, Illinois, Spring and Summer 1929 Collection.   Some products are described and six photos show items on part-pages.
[12] Blue Skies Thinking ..... strictly for the birds?   By Peter Smith and Jeremy Jago.
Nice bit of techno-foolery illustrated.    Comment - Hmmm ... where do I fit the funny fat cigarette plug in to my circuit simulator to run this lot??? - Keith V.

Volume 37 Number 4
[2] NBTVA Local Meetings Sunday October 27th   
East Midlands and North UK meeting.   Hosted by Zoe Bremer at  Wollaton, Nottingham, 2pm-6pm.
Southern UK local meeting will be hosted by Peter Smith in Reading, Berkshire.   Please phone in advance - 01189 477 573.
[2] Cover Picture is Vic Brown's 40mm(!) Nipkow Disc
[2-4] The Nipkow Nipper - The world's smallest NBTV   By Albert Noble.
Comprehensive article detailing results and construction with diagram and pictures.
[4-5] Memory Stick Replacement for CD Player   By Peter Smith G4JNU.
Use of portable MP3 player to store/play NBTV .WAV files (some will), with comments and circuit.
[6-7] Signal Conditioning for NBTV   By Karen Orton.   Using portable MP3 player to store/play NBTV .WAV files, with comprehensive comment and signal conditioning circuit.
[7] Local Electronic Component Suppliers.    Send in details of your local suppliers - avoid the handling charges!
[7] Electronic Cameras - Further Evidence at the very end of Baird 240 line TV.
Use of Image Dissector tubes on air at Alexandra Palace.
[8-10] An Experimental NBTV RF Transmission Format  By Vic Brown.
This is a new standard with lower scan rate and 4:3 aspect ratio, giving good results in 5kHz bandwidth.   Comprehensive article with descriptions, graphs, pictures and circuits.
[10] A CD Drive Tip   By Graham Hunt.   Possibility of inverted outputs on some drives.
[11-12] The 'Everest' K2 Mk 1 NBTV Video Level Adaptor   By Steve Anderson.
Solves problems with accurate measurement of video levels, with picture and diagram of PIC circuit.
[12-14] A Line Scanner using LEDs   By Jeremy Jago.   Use of 4017 decade counters to scan a LED matrix, with description and circuit.
[13-14] Two-colour NBTV Experiments Update   By Graham Hunt.   Experiments with multi-channel drivers and Luxeon LEDs, with description and pictures.
[14-15] LED Neon Light   By Peter Smith G4JNU.   Pictures and description of realistic-looking replacement for flat-plate neon lamp.
[15] Bognor Regis Museum Re-opened   By Graham Hunt.   Description of exhibits of early TV at new venue.
[15] Annual General Meeting 2012 - summary of decisions.   New subs rates - mainly due to much-raised postal charges, E-membership, club sales latest news, amateur radio activities, Info and publicity and further projects.
[15-16] A Poverty of Photosensors.   Efforts from various members trying various sensors.   *N.B.*  The pre-amp shown without explanation is for high-R, high-C cheap garden ornament cells.   It acts as a current amp as Rin << Rcell,   At higher frequencies + feedback capacitor cancels most of Ccell of >30nF to raise cell impedance.
[16] Photos   1 Karen Orton's timing corrector tried out on Dave Gentle's mirror drum.
         2 Graham Hunt demonstrates 2-colour display to Keith Vickers.
         3 Karen Orton demonstrates her mirror screw disc.
         4 Dave Gentle is shown Mechanical(!) Oscilloscope by Volker Mohr (seated).
         5 Karen Orton's monitor using printed disc.
         6 Televisor in Bognor Regis Museum - see Graham Hunt's report on p15.

Volume 38 Number 1
[2] Annual Convention Saturday April 13th at Loughborough University.
[3] Benelux Convention Report   By Klaas Robers.   Descriptions and pictures.
[3-6] Did the Baird System of Synchronisation Work?   By Peter Smith G4JNU
Comprehensive analysis with descriptions, circuits, diagrams and waveforms.
[6] Test Card Probe   By Graham Hunt.   Use of the MUTR PIC pattern generator as a test probe, with mods description.
[7-8] NBTV Standards Processor   By Karen Orton (and not a PIC in sight!).
Nice black-level and gamma etc corrector, with descriptions, circuit and pictures.
[8] The Genius of Invention TV Program, shown on BBC Feb 2013.
Picture of Ian Baird and Peter Smith in live TV demonstration with disc camera and authentically-reconstructed receiver.
[9] Club Motor Controller: Operation & Setup   By Karen Orton.   Operation of Peter Smith club Motor controller and setup procedure.    Circuit included, with descriptions.
[10-11] Suppressed Carrier NBTV Transmission   By Vic Brown G3SDQ.
A good description of VSB-SC-NBTV and the problems faced when compared with ordinary speech transmissions.   Circuit and photos of actual waveforms included with block diagram of suggested solutions.
[11-12] Mark 2 NBTV to Video Converter   By Karen Orton.   Improvements on the single-chip converter of V36-2.   Extensions and improvements are described, with circuit and pcb layouts.
[13] Large Area Photosensors on test   By Jeremy Jago.   Practical readings from a number of different available cells at a fixed light level.   A Transimpedance amp (circuit shown) was used with four different cells and results are pictured
[13] Stop Press - re lenses for the above and other photosensors.   Graham Hunt reports on possible source from broken car headlamps.
[14] Orton's PlCery Amendments.   Karen's updates to her NBTV Timing Corrector, NBTV Pattern generator and Motor Case Synchronisation.
[14] Supermarket LED LightSource and Diffuser   By Phil Hunter.   Using a supermarket LED lamp and a homebrew diffuser gives a nice backlight.
See results on youtube (address given).
[15-16] Line-o-LED — a new solid state line scanner   By Karen Orton.
Handy multiplexed PIC design to drive a row of narrow rectangular LEDs for a vey nice display, with description, pictures and circuit.
[16] A Scanning Enigma   By Phil Hunter.    Oddities in actual and perceived movement on NBTV images, with experiments, comments on theories and questions.

Volume 38 Number 2
[2] Local Meetings Saturday Oct 26th.   East Midlands and North UK meeting, thanks to Zoe Bremer at 1, Burnwood Drive, Wollaton, Nottingham NG8 2DJ, 2pm-6pm.
Bus/tram travel instructions included.
Southern UK local meeting will be hosted by Peter Smith in Reading, Berkshire.   Please phone in advance - 01189 477 573
[2] Three-dimensional Printing for NBTV use.    Brandon Inglis's experiments in NBTV parts manufacture.
[2] Historic Challenge to build a working replica of the double-eight silhouette system.
[3-4] A PlC Based Colour NBTV Decoder   By Vic Brown, Karen Orton and Klaas Robers.   Update on the 2004 Convention presentation by Vic Brown's colour Nipkow disc.   The newer, PIC-based system is discussed, with block diagram and pcb layouts/interconnects.
[5-6] Test Disc for Colour NBTV Decoder (2)   By Klaas Robers and Vic Brown.
New CD is developed for testing the PIC-based decoder for Compatible Colour NBTV.   Descriptions of 52 tracks, with about 30 colour pictures.
[6] S/PDIF Line Receiver for PIC-based Colour NBTV Decoder (3)   By Vic Brown and Klaas Robers.   The CS8416 digital audio line receiver processes the CD or DVD signal.   Article includes instructions, circuit, pcb layouts and timing waveforms.
[7] Mirror Drums Re-examined   By Jeremy Jago.   Practical use of mirror drums and possible use of rear-silvered mirrors.
[8] Convention Report of many demos, some detailed in this issue.
[8] Annual General Meeting dealt with increased postal costs issue, disc production, appeal for pictures for gallery and appeal for listeners to Saturday 7:30am NBTV net as propagation improves. 
[8] Discussion summary: British Library of Club publications being investigated, electronic newletter options discussed, etc.
[8] Maker Faires   By Volker Mohr.   Get-togethers to exchange info, obtain parts etc, get access to specialised tools/machinery etc.
[8] More Recomended Retailers.   Three more member-recommended retailers.
[9] Nipkow Disc 30 Line Camera   By Peter Smith G4JNU.   Peter described his first disc camera and some construction details, with pictures.
[9] My NBTV Activity This Year   By Dave Gentle.   Upgrading and greatly improving a 1998 mirror screw camera. 
[10] LED Beehive Neon   By Peter Smith G4JNU.   Construction of an authentic-looking LED beehive 'neon' for a replica Baird disc scanner, with descriptions and pictures.
[11-12] Automatic Frame Synchronisation for the Club Motor Controller   By Karen Orton.    A PIC (what else?!) - based controller for automatic frame synch is described, elegant as always, with circuit.
[12] Orton's PICery errata errata   By Karen Orton.   A revised revised version of V38-1 and previous original article in V37-3.   Improvements to gamma etc, with new new circuit.
[13] Large Mirror Screw Colour Display   By Steve Ostler.   This is a hi-def machine by NBTVA standards and some details of this magnificent beast are given, with pictures.
[13] DSP Secrets Revealed   By Karen Orton.   Karen wrote this primer on DSP and it is on the NBTV website, accessible to paid-up members with password.
[14-15] Mirror Screw Disc Monitor   By Karen Orton.   A remarkable combination of the two technologies, with practical description and pictures.
[15] Compact Test Card Generator   By Karen Orton.   A remarkably effective design using a PIC and few other parts to generate a handsome NBTV testcard.
[16] Photo News - Convention photos.
	1 Vic Brown and Bryan Oliver view Vic's CCNC.   Centre - Jeremy Jago's non-Z axis display.
	1(right) Colin Thompson and his disc monitor.
	2(left) Peter Smith's reconstructed Baird Maltese cross demo.
	2(right) unit on display in ITV HQ offices.
	3(left) Eddie Greenhough shows his 32-625 line replay to C. Thompson and K. Orton.
	3(right) Volker Mohr with his disc monitor.
	4(left) Chris Youens (seated) views Dave Gentle's camera-monitor.
	4(right) Eddie Greenhough's mirror screw in action.

Volume 38 Number 3
[2] Benelux Convention report   By Klaas Robers.   Significant numbers of members attended and showed their equipment, some of which is mentioned.
[2] Hints for Constructors   By various members.   Includes hints on LED domestic lamp uses, use of SCART etc cable cores, case building and ex-car condenser lenses.
[3-4] Printed Circuit Board for PlC Colour NBTV Decoder (4)   By Karen Orton, Klaas Robers and Vic Brown.   Assembly instructions and testing, with diagrams.
[4-5] Integrated 625-line CCIR Sync Generator   By Klaas Robers.   A decades-old IC1610 design available to NBTVA mambers to easily make a sync/blanking generator, with circuit and picture.
[5-6] A Wall-mounted NIPTRIX (NIPkow + maTRIX)   By Albert Noble.   Developed from JJ's 4017-switched matrix, this design uses 1536 brilliant white LEDs, with description, block diagram and pictures.
[7] 1931 Product Review   By Peter Smith G4JNU.    The Telehor dual standard receiver, described with some circuitry and pictures.
[8] Molino de Imagenes - The Mill of Images   By Marcelo Pereira.    Circuit of a super-simple NBTV camera-monitor intended for disc use.
[8-9] Improved PlC 625 to 32 Converter   By Karen Orton.   The previous camera converter is improved, with better sampling for a significantly improved picture.   Article includes description, with upgraded circuit.
[9] The Lost Lines Convention   By Jeremy Jago.    Historical review of scanning efficiency i.e. actual lines displayed v theoretical quoted in mechanical and electronic TV and intermediate film systems.
[10-11] CRT No Messing   By Karen Orton.   An interesting use of a PIC to convert 32 line to 625 line standards, with regenerated 625 line video and syncs.   The design uses as much as possible of the original 625 line circuitry to minimise mods to the TV set.   Some description is provided, with circuit diagram.
[12] Independent Synchronisation   By Jeremy Jago.   Historical use of 50-cycles mains for sync of mechanical TV receivers.
[12-13] Auto Frame Sync (Deluxe Version)   By Karen Orton.   A smoothly-operating version of the motor case sync circuit is shown, with descriptions, settings and pcb layout.
[14-15] The Quest for Noah’s Ark   By Colin Sanderson.   Colin's (mis)adventures in his quest to find accurate info on the rare 'Noah's Ark' televisor.
[15] RoIl Camera...   thoughts by Dave Gentle on the near-demise of genuine mechanical cameras.   He wishes enthusiasts of them would send in more news of their exploits, results and hopefully sample recordings.
[16] Photo News  1(left) Albert Noble's Niptrix screen (p5)
	1(centre and right) Eddie Greenhough's Colour Mirror Screw at Midlands local 	meeting Oct 26.
	2(left) Karen Orton's Kerkof display (p10) (centre) ditto at 2013 Convention.
	2(right) Replay of Dave Gentle's file nbtv2013dec7 (p15).
	3(left) Oct 26 meeting - Karen Orton demos auto-framing monitor (p12) to Colin 	Sanderson.
	3(centre) Colin's Nipkow 'visor
	3(right) David Gentle shows webcam recordings of mechanical camera-monitor 	displays.
	4 J. Jago's reception at 135 miles of 30 line 8.33 fps test by Vic Brown G3SDQ 	to Peter Smith G4JNU on 	5369kHz.
	4(right) Waveform of nbtv2013dec7. 

Volume 38 Number 4
[2] NBTVA Convention 2014.   Saturday April 12th at Loughborough University.
Location is the School of Electrical and Electronic Engineering building, located beside the university bus route and approached via the concrete steps on the left - see instructions.
Public transport info is given and there is a car park available *N.B.* BEWARE OF CLAMPING!
[3-4] RGB LED Drivers for PIC Based Colour NBTV Decoder (5)   By Klaas Robers and Vic Brown.
62-step assembly instructions, testing and setup, with some circuitry and pcb track and top layout.
[4-5] Fabb Motor Hubs   By Brandon D. Inglis.    Fabrication of custom NBTV motor hubs using a self-replicating i.e. built by itself(!) 3-D printer.   See www.reprap.org for more details.   There is also details of the "RepRapProHuxley" at www.reprappro.com
[6] VSB-AM Transmission Test Report   By Vic Brown G3SDQ.   Pictures of Vic's recent test transmissions on 5MHz band, with comments on ghosting effects.
[6] MUTR NBTV Files on the Web   By Klaas Robers.   The files of the NBTV CD that MUTR (now called "Mindsets Online") sent with their attractive Televisor kit, are now made available on our website: www.NBTV.org/MUTR-disc/ in.WAV format.
[7] Medium Wave Amplitude Modulator   By Peter Smith G4JNU.   Circuit, description and pictures of a small modulator to allow very low power TV transmissions e.g. within a room.
[8-10] By ICs Don't Be Beaten – Throw it Away and Use a Discrete 'N!   By Karen Orton.   Discrete component (no PIC-in!) intended to follow the Baird Televisor's behaviour as much as possible, with pictures, circuits and explanations.   N.B. Very interesting anti-burnout circuit for the LED drivers.
[10-11] Flying Spot Scanner   By Phil Hunter.   Use of an ancient film slide projector with a disc to produce an image so bright it can be projected on a wall, with descriptions and pictures.
[11-12] Flying Spot Scanners - a Historical Perspective, parts 1 and 2.   Description, some details, a diagram and a detail picture of this 1930s television equipment.
[12] Across the Atlantic - the Other Way.   An excerpt from the Radio Miscellany  column by 'Centre Tape' in Radio Constructor Magazine, Vol 5, No. 1, August 1951.
Description of the reception of an NBTV transmission from the General Electric Co. in New York by Douglas Walters, G5CV in West London.   There are also details of 5m reception  in a Puss-Moth aircraft at 130 miles from Crystal Palace.

Volume 39 Number 1
[2] Local meetings advance notice – Saturday October 25th.  Notice of Midlands and North meeting to be held at Nottingham and Southern meeting to be held at Reading.
[2] Club meetings – further ideas. Reactions sought on ideas for further meetings in the form of an Experiment Day or a Reading and Information Day.
[2] Archive.org – the information warehouse. By Keith Vickers. Alerts members to the goldmine of information from radio and electronics magazines, books and reports available on this site.
[3] Front cover picture – Marcelo’s NBTV project. Reported by Vic Brown. Description of camera and monitor project build by a Portuguese member using bicycle dynamos for sync and an AC coupled LED driver circuit.
[4] Peter Yanczer 1927 – 2014. A description of Peter’s life, career and hobbies, including the enormous contribution he made towards experimental television and NBTV.
[5] A simple synchronisation diagnostic tool. By Karen Orton. A small adapter device for the Peter Smith LED driver boards that enables the synch separator’s output to be checked using the monitor itself, rather than a ‘scope.
[6] Ghost busted. By Vic Brown G3SDQ. A further analysis of the ghosting on a 5MHz NBTV transmission via sky wave propagation.
[7] The Telehor sync wheel. By Peter Smith G4JNU. The construction of a replica sync wheel based on 60 tooth gear wheels and mild steel plates set in epoxy resin.
[8] Some personal comments on NBTV. By Karen Orton. Karen describes how she came to join the club and her views regarding the aims and future direction of the club and newsletter. (See also an addendum on page 10 of Vol. 39 No. 2)
[8] The Baird grid cell unit. By Jeremy Jago. A description of the unit that was marketed by the Baird company around 1933.  It was a Kerr cell light modulator. Principle of operation described by H J Barton-Chapple.
[9] Fluorescent lighting and NBTV.  A description of the ripple effect caused by this form of lighting and the improvement provided by modern compact fluorescent lamps, particularly when run on DC.
[9] The PIC4046 – yet another automatic frame synchroniser. By Karen Orton. This version requires no additional opto fork and uses only one low cost IC to achieve frame lock very smoothly and reliably. Employs the usual covered sync hole for frame reference.
[11] Your Newsletter and membership. By Jeremy Jago. Discusses expenditure on printing and posting costs and proposals on cost saving. A trial of optional electronic delivery will begin in 2015.
[12] NBTVA Convention report. A report on the 12 April 2014 Convention with photos.

Volume 39 Number 2
[2] Report of Southern UK local meeting. Report of meeting held on 25 October 2014 at Reading, with photos.
[2] NBTV at Wirksworth festival. Display of NBTV by club members on 14 September 2014 as part of Wirksworth Festival in Derbyshire. Rewarding response from public.
[3] Midlands and North UK local meeting reconvened. Meeting reconvened for Saturday 21 January.
[3] Speaker cabinet televisior. By Graham Hunt. Construction of a televisor from a £1 boot sale find. 
[3] Video sender. Transmission of NBTV demonstrated using the sound channel of a video sender. Good pictures obtained, but with some LF reduction. The prefereable video channel is next for the test.
[4] Just the biscuit. A Cadbury’s Aperture drum monitor. By Graham Lewis. Detailed information on the construction of televisor from a 225mm diameter biscuit tin, together with circuit diagrams and photos.
[7] Frame sequential colour in 2012. By Karen Orton. An investigation into the operation of an electricity monitor with a LCD screen. A full colour display of R, G and B was built up in 15mS. Improvements in LCD switching speed might one day allow use as light valves in the manner of Kerr cells.
[7] RGB sensors. By Graham Hunt.  The availability of RGB sensors is noted, in particular the ‘color sensor breakout HDJD-S822’. Level of sensitivity for use in a disc camera uncertain.
[8] Mirror drum light source. By Peter Smith G4JNU. Method of mounting a high intensity white LED type LXR7-SW57 and the selection of a suitable heat sink.
[9] A simple cassette equaliser. By Karen Orton. Description of a replay post-filter to deal with the low frequency roll-off, high frequency phase shift and low frequency phase shift that cause problems when using cassette recorders for NBTV.
[10] John Logie Baird. News items from Malcolm Baird: Baird honoured by the American SMPTE and Baird’s 1926 television equipment – a new assessment.
[11] The Achievement of Television – Review of paper. Jeremy Jago reviews Don McLean’s extremely detailed paper that adds much valuable new understanding.
[11] NBTV pocket monitor revisited. By Karen Orton. Karen describes some revisions to her NBTV monitor (Vol. 36 No. 3) that started out as an experiment in pixel dithering.  These include a brilliance control for which new firmware is available.
[12] Active rheostat with flywheel synchronisation. By Karen Orton. A motor controller using the VCO section of a 4046 PLL to provide flywheel sync, rather than relying on edge-triggering. This makes motor control less susceptible to disturbances in the sync pulse chain.
[13] 180 lines and 240 lines meet stiff opposition. By Karen Orton. Methods that can be used to cure raster patterning in a 180/240 line monitor, including cathode lead screening, a LOPT ‘flux band’, extra EHT smoothing and re-wiring line scan coils.
[14] A media player for Baird 240 lines. By Karen Orton. Modification of 525 line cameras and media players to 240 lines, based on the observation that a field of 525 line video looks very much like one frame of the Baird 240 line system.
[15] Laser printer mirror drums. By Karen Orton. Discusses the useful components that can be obtained for a failed printer and a typical optical system, including a mirror drum, laser, lenses and mirrors. Possible application to NBTV considered, and safety aspects stressed.

Volume 39 Number 3
[2] Annual Convention 12th April. Notice of Convention to be held at Loughborough University on 12 April 2015 (note shown in error as 2014).
[3] 3D printing mirror drums. By Brandon D Inglis.  Describes the building of a half-scale model of the Baird-Bush 30-line mirror drum, with photos of 3D printing in progress.
[3] A Nipkow disc in pinhole mode. By Jeremy Jago.   Discusses the principles of operation, and light sensitivity achieved using a 460mm Nipkow disc in pinhole mode.
[4] Dome sensor. By Byron Ake. Byron discovers the original part number of the club’s dome sensor to be VTP1188SH.  More information available from listed web sites.
[5] Short circuit detector. By Peter Smith G4JNU. Describes the construction of a small short circuit tester that will not damage sensitive low voltage semiconductors. Tester has a maximum voltage of 50mV and a current of 1mA.
[6] NBTV and RBTV compared. By Vic Brown G3SDQ.  Discusses the technology and relative merits of new digital and traditional analogue methods of transmitting amateur television in bandwidths of less than 1MHz.
[8] Photographing NBTV and other slow displays. By Steve Anderson. Tips on how to get good results when photographing flickering NBTV screens.
[9] A compact flash player for intermediate television standards. By Karen Orton. Makes use of newer CF cards that are incredibly fast, with 500 pixels per line for the Baird 240-line standard, with sound encoded in the pixel data during line sync.
[11] Peak following slicer. By Garth Porter. A circuit designed to overcome the poor quality and varying amplitude of sync pulses obtained from opto forks on the edge of a disc, or received over variable radio paths.
[13] NBTV Arcana. By Karen Orton. A study of the often-ignored problem of Nipkow hole migration. 
[13] Midlands UK local meeting report. A report of the re-scheduled meeting held in Nottingham on 31 January 2015, with photos.
[15] A story of failure – a grating based monitor. By Karen Orton. A potential method of scanning that required much better mechanical accuracy than it was possible to achieve on this attempt.
[16] Synchronising the Aurora converter.   Methods used by Colin Sanderson and Steve Ostler to synchronise the Aurora converter to an external source. Thus, pulses from the Nipkow disc or mirror screw become the sync reference, rather than that generated by the converter. Includes pulse processor circuit by Steve.

Volume 39 Number 4
[2] John Logie Baird commemoration at outdoor museum. Report and photos of a stone unveiled in Scotland commemorating Baird’s pioneer achievements, as part of an Outdoor Museum at Colquhoun Square, Helensburgh.
[2] Export ban on John Logie Baird archive. An item that appeared in the Guardian newspaper regarding an export ban placed on an archive relating to JL Baird’s first transmission of transatlantic television. Ben Clapp originally owned the collection.
[3] Public interest. By Graham Hunt. A working televisor left on display in a reception at Graham’s workplace creates at lot of interest from customers ranging from teenagers to pensioners.
[3] Colour television report. By Colin Thompson. A description of the successful construction of colour televisor after some initial problems. It incorporates automatic frame sync, together with additional circuitry to allow colour or B+W to be displayed from the same DVD player.
[4] Construction tips. Tips include: (from Karen Orton) laminate flooring as a source of prepared wood, securing 5.5” CRTs using hose clips and component changes for the single transistor LED driver. Graham Hunt uses heat sinks and hardware culled from old computers to mount LEDs. 
[5] Programmable unijunction transistors as magnetic deflection oscillators. By Karen Orton. Circuit and description of the use of PUJs (like ‘TI A7T 6028’ from club shop) in line and frame magnetic timebases.
[5] The Hellschreiber. By Peter Smith G4JNU. A description of this electro-mechanical device designed by Rudolf Hell in the early 1930s as a way of sending text over wire or wireless, including photos and circuits for the receiver, and a half-frequency supply motor driver used to save paper tape.
[8] Spot wobble for 5 inch magnetic CRTs. By Karen Orton. A method of achieving spot-wobble by adding an additional coil on the tube neck, including circuit for a wobble oscillator.
[9] Photodiode preamp note. Results of tests conducted on the preamp described in Vol. 38 No. 1 when replacing the CA3130 for a TL071, as suggested by Keith Vickers.
[10] Correction lens for NBTV. By Steve Ostler. A description of the construction of a lens to convert a 1:1 aspect ratio to 3:7, made from glass and plastic, with tap water as the optical medium.
[11] Construction of the B.O.T. – The bread-bin Octagon Televisor. By Graham Hunt. Use of a bread bin, plant pot tray, plywood and head of a four-pound hammer to make a televisor with a high quality picture.
[12] Veroboard layouts. By Vic Brown. Gives practical information on Veroboard layouts for use when PCBs are not available, using a head end amplifier as an example.
[13] Spirographic scanning. By Karen Orton. An experimental scanning system consisting of a laser pointed at two small DC motors with swashed mirrors on their shafts. Results from a transparency scanning system described.
[14] A continuous-film transmitter, 1935. By Jeremy Jago. A description of a 30-line ‘telecine’ machine constructed by J H Reyner BSc AMIEE in early 1935. The film was shot on a modified Standard 8 and generated on a modified 16mm projector. 
[15] 2015 Convention and AGM report (photos overpage). Photos include Colin Sanderson’s Noah’s Arc Televisor, Volker Mohr’s Disc Televisor, Edward Nowill’s 30-line TV record, Luciamo Moraes’ new converter and Karen Orton’s audio cassette player and magnetic CRT display.

Volume 40 Number 1
[2] Correction. This relates to the correct name for the Major Radiovision 78rpm 30-line TV disc.
[2] UK local meetings. Notice of meetings to be held in Reading on 17 October 2015 and in Nottingham on 14 November 2015.
[2] Compact flash intermediate standards player – conclusion. By Karen Orton. The completion of the Linux preparation software now enables comment on the results of playback at 180 lines and 240 lines. A serious problem with the newer Compact Flash cards has been exposed.
[3] Zoning a Nipkow disc. By Vic Brown. Describes a method of zoning a Nipkow disc using a special switched light source that avoids the need for a very high disc rotational speed.
[5] Rear projection optics. By Karen Orton. A description of methods using Fresnel Lenses and lenticular sheets that avoid the vignetting associated with direct projection onto a diffuser sheet.
[7] The Magnifico high magnification monitor. By Karen Orton. A small mechanical monitor applying the ideas of the previous article (page 5) that allows armchair viewing of a small Nipkow disc. Includes description of the optical layout and the simple three transistor electronic circuit.
[10] A pulsing star. By Peter Smith G4JNU. A Christmas electronic novelty that also demonstrates two early circuits, namely the multivibrator described by Abraham and Bloch (1918) and the Miller integrator patented by A D Blumein.
[10] Cue-in-blanking converts 625 camera to NBTV. By Karen Orton. A simple but “outlandish” way of obtaining NBTV from a 625 line (CCIR) camera module that involves removal of the camera’s quartz crystal and assigning its function to a PIC.
[12] Frame sync for standards converter. By Peter Smith G4JNU. Modifications to Peter’s original 625 to 30/32 line standards converter to allow the speed of the disc to control the rate at which the digitised picture signal is read from memory. Three ways of driving the disc at a steady speed are described.
[14] Laser Printer mirror drum units. By Graham Hunt. Some observations on the optics of a laser printer mirror drum, where the deflection angle is affected by moving the laser pointing position.
[14] A versatile transformer. Phil Hunter has located a small AF multi-ratio transformer with many likely NBTV uses, namely the Bogen Communications Inc. model T 725, part no. 83-488-000.
[14] Recommended books. By Jeremy Jago. Gives details of two recommended books on electric motors by Jim Cox, plus publishers and sales web site addresses. 
[15] Typical Lux light levels. Gives a broad idea of light levels when quoted in Lux, from ‘poor starlight’ to ‘British summer sunshine’.
[15] Unusual optoelectronic ideas. ‘A template waveform generator’ that enables any waveform to be reproduced from a template cut on a piece of card (D M MacKay, 1947), plus ‘Can non-linearity generate a signal’ by using a photoelectric surface (H A Ricardson, British Patent 425 660).
[16] Baird zoned TV at Epsom racecourse. A historic press illustration, plus ‘The day before the Derby – 1931’ by D R Campbell.

Volume 40 Number 2
[2] Local meetings reports. Reports of meetings held in Reading on 17 October and in Nottingham on 14 November 2015. Photos show Peter’s 625/32 line converter, David’s ‘hologram’ app, Karen’s CF card player and Jeremy’s zoetrope display. 
[3] Drawing pin televisor discs. By Graham Hunt. A description of the use of drawing pins and chrome headed upholstery tacks on Nipkow discs to produce bright pictures by reflection, with photos.
[4] An integrated Nipkow televisor light source. By Ralph E Taggart WB8DQT. Describes the design of a televisor that, for educational reasons, has all the mechanics plainly visible but without the obvious presence of modern day electronics.
[6] A look at the Telehor standard. By Vic Brown. Looks at the pros and cons of this 4:3 aspect ratio, 30-line system.
[6] Rewiring a deflection yoke. By Jeremy Jago. Describes how the line deflection coil of a yoke from a 525/625 TV was taken apart and the originally paralleled turns re-wired in series to increase resistance, current sensitivity and inductance for NBTV use. 
 [7] Experiments with LCDs (long and a little complicated). By Karen Orton. Experiments aimed at finding efficient dithering methods to overcome the difficulties of driving various types of LCD display with integral controllers for NBTV.
[9] Going digital… the low-tech way. By Karen Orton. Describes how to send digital NBTV over a 5.8Ghz video sender, with circuit for interfacing with 5V digital logic levels.
[10] A low frequency counter. By Jeremy Jago. An electromechanical frequency counter based on an ex-photocopier counter and a 4 rpm geared mains motor.
[12] Miscellaneous hints and news. Print your own labels (Peter Smith), Lamp interference (Graham Hunt), Local area electronics shop (Graham Hunt), Reclaimable motors (Jeremy Jago), A bright white LED source (Karen Orton),
3D printing for mirror drums and Forthcoming subjects.

Volume 40 Number 3
[2] NBTVA Convention 2016. Notice of the Convention to be held on Saturday 9th April at Loughborough University.
[3] Transatlantic TV archive…A follow-up. An anonymous donor with links to JLB’s home town has stepped in to save an archive relating to the first transatlantic TV tests (see Vol. 39 No. 4).
[3] Line interlaced zoning. By Vic Brown. Description of a technique that allows a basic 32-line bead disc to display, for example, 96-line pictures, by using 3 close –spaced LEDs driven with an independent video signal for each zone.
[4] The (w)hole story: An aperture drum hole punch. By Graham Lewis. Construction of a device that resembles a paper guillotine for accurately punching the scanning-strip for an aperture drum.
[6] PC boards for Karen Orton’s 625 to 32 converter. PCB and pre-programmed PIC for this project are now available from club sales. Includes layout diagrams.
[6] Useful power supplies for NBTV. By Peter Smith G4JNU. Describes two 60-volt PSUs for Baird-type or similar motors, a 1-5-2V and 50V PSU for valve sets, and an adapter to provide 1.25-9V from a cheap single12 volt plug top supply.
[9] Synchronisation by relay. By Jeremy Jago. A description, with circuit diagram, of the operation of a synchronisation system used by Baird prior to the toothed wheel’s introduction.
[9] Notes from Graham Hunt. Observations from a visit to Alexandra Palace, plus some addresses for component and semiconductor suppliers.
[10] Another failure. By Karen Orton. Mishaps during a spin-up test of a carousel monitor that resulted in the destruction a of rotary transformer.
[10] A standard independent compact flash player. By Karen Orton. This Compact Flash player furnishes a continuous replay stream and has universal application to television standards that conform to the data rate/bandwidth it supports. 
[12] Cassette recording of NBTV – yet another solution. By Karen Orton. In this system a recording pre-processor lengthens (or shortens) sync pulses with the aim of bringing their tips to a common level on playback. A low pass filter topology predicts the sync tip profile.

Volume 40 Number 4
[2] A simple bead disc. By Byron Ake. The construction and results from a bead disc made from black foam board.
[3] A compact NBTV camera. By Chris Lewis. Combines Karen’s 625-32 line converter, built on Klaas’ PC board, with a miniature CCD camera module.
[4] Printed mirror drum project – A progress report. Details of the work involved in transforming the raw product from the 3D printer into a working mirror drum, with comments on prototype and conclusions. 
[5] Baird’s optical lever. From Byron Ake. A description of Baird’s optical lever taken for the American magazine ‘Television’ published in 1928, which may aid understanding of this complex device.
[6] Adventures with NBTV camera-monitor design. By Eddie Ball. Description of a camera-monitor using a single turn Nipkow disc, with original circuits for the motor PLL, head end amplifier and camera image re-framer.
[10] The Videonow player. By Byron Ake. A look at this 80x80 pixel, 15 fps, 16 grey level  B+W format mini CD video viewer player produced by Hasbro in 2003.
[11] A mirror screw analysis. By Karen Orton. Presents formulae to assist in the design of a mirror screw televisor, including calculations for the dimension and arrangement of components and optimum viewing layout.
[12] A WAV player using the Raspberry Pi. By Chris Gavin & Peter Smith G4JNU. Describes the use of a Raspberry Pi to playback 30 line WAV files with seamless repeat. ‘Audacity’ software is used to cut the file to the required length that is a multiple of 2 seconds.
[13] Cassette equaliser revisited. By Karen Orton. Since submitting her ‘Simple cassette equaliser’ article (Vol. 39 No. 2) Karen has gathered certain insights that call for a revision. A new equaliser circuit is presented together with a record side circuit.
[15] Convention and AGM report. Report of Convention held on Saturday 9th April 2016, with an array of photos on page 16.

Volume 41 Number 1
[2] UK local meetings – October 2016. Notice of Southern meeting to be held on Saturday 15 October in Reading and Midlands and Northern meeting to be held on Saturday 22 October in Nottingham. 
[2] Cover picture – How the box was born. Picture shows Peter Smith’s Maltese cross demo in forthcoming TV 80th anniversary documentary. Provisional broadcast date Wednesday 2 November 2016, BBC4.
[2] Archive resources. Byron Ake is looking for help in finding information on the BBC 30-line era.
[2] Tips. Tips include Cathode ray tube fixings (Karen Orton), Mirror material (Graham Hunt), Inductors and capacitors (Jeremy Jago).
[3] Organic LED (OLED) based NBTV display. By Kevin Hadfield. Kevin’s colour NBTV display uses an Arduino Uno to organise the parallel data from a decoder PIC into SPI serial format so that it can be transferred to the OLED display module. Sharp images with high dynamic range and wide viewing angle are produced.
[5] Upholstery pin televisor. By Graham Hunt. Graham describes his televisor that he displayed at this year’s Convention. It produces a bright picture from an LED turned right down.
[5] Fractal scanning. By Vic Brown. Experiments with this form of scanning show that good picture can be obtained, although no special reasons to recommend it for NBTV were identified at this time.
[7] NBTV simulator revisited. By Karen Orton. This circuit allows the demonstration of 30 line images on standard 625 hardware. It discretises the horizontal scan, which reduces the picture to a number of vertical stripes.
[9] Club printed circuit boards. By Chris Lewis. Chris describes the practical aspects of constructing the club PCBs, including comments on the situation wrt lead-free solder.
[10] The little known resistor. By Karen Orton. Karen points out that the C-E junction of a silicon transistor exhibits negative resistance when reverse biased – rather like a low power neon bulb.
[11] Glitch suppressor for Raspberry Pi. By Peter Smith G4JNU. Concerned that mains failure followed immediately by fluctuating ‘power-on’ might cause memory card corruption, Peter designed this circuit to protect a Raspberry Pi used in a museum NBTV exhibit.
[12] Baird 240 line spotlight studio, 1936. Presented here are some technical details of this historic apparatus, together with some photos annotated by Steve Ostler.

Volume 41 Number 2
[2] UK local meetings reports. Reports of the Southern meeting held on Saturday 15 October in Reading and the Midlands and North meeting held on Saturday 22 October in Nottingham.
[2] ‘How the box was born’ reviewed. Review of 90-minute television programme commemorating BBC Television’s opening night 80 years ago on 2 November. 
[3] Another high magnification montor. By Karen Orton. Karen’s latest televisor has a retro appearance and produces a 2 inch picture from a 6 inch disc by means of an optical arrangement that resembles a periscope. 
[4] The Norman Stokes televisor. By Peter Smith G4JNU. A sympathetic restoration to demonstrate this televisor working, including the design of a mains supply with the frequency locked to the sync of the 30-line signal.
[6] Progress report. From Gunner McGee. News of Gunner’s Baird reconstruction project, including a 3D printed mirror drum, a Visitron photocell, and a replica of a Baird test card drum.
[7] Multi-carrier NBTV transmission. By Vic Brown. Describes experiments with a system designed by Con Wassilieff, ZL2AFP for transmitting moving NBTV over short wave radio, with some suggestions for possible variants aimed at achieving a degree of compatibility with conventional NBTV.
[8] Motor case sync (Analogue version). By Karen Orton. This version uses a new analogue rotational encoder consisting of two Hall devices placed at right angles to each other and to the adjustable shaft that bears a bar magnet.
[9] An adjustable test generator. By Jeremy Jago. Producing a 10-step greyscale waveform from the stripper board from Club Sales. Each step’s voltage is manually settable.
[10] Cassettes. By Karen Orton.  Bearing in mind the physics of tape recording and the equalisation carried out in consumer cassette decks, Karen concludes that an exchangeable system of cassette storage of NBTV must confine itself to the mid frequencies, i.e. abandon everything below 200Hz. A proposed record pre-processor and encoding scheme is described.
[12] Cathode ray tube test rig. By Jeremy Jago. Jeremy describes a useful unit that allows CRTs of unknown condition to be proved with a full standard NBTV picture, including circuits for line and frame oscillators, sync separator, grid modulation, EHT and 12V power supplies.
[13] Some notes on Magnifying glasses. By Karen Orton. Karen defines the meaning of Dioptre and its relationship to focal length and the often (mis) quoted magnification factor.
[13] Recommended book download. Refers to O S Puckle’s book ‘ Time Bases’.
[14] Some more insights into the Peter Smith motor controller. By Karen Orton. Karen muses on the possible benefits of inverting the motor controller output stage, reversal of pins 3 and 14 to allow sine wave sync input, and the use of series resistors to allow MOSFETs to run cooler.
[15] Photosensor active load. This unusual circuit, traced from an IR receiver paired with a transmitter, uses a pulsed beam to prevent it being blocked by interfering light sources. It may have applications in NBTV flying spot scanning.
[15] Spotlight scanning. By Dr Alfred Gradenwitz. An excerpt from a 1935 article in ‘Television Today’. It provides interesting technical details of the Fernseh-AG flying spot scanner employing a disc rotating at 6000 rpm in a vacuum, similar to that used by the Baird Company.

Volume 41 Number 3

Page 2 Convention April 8th at new location
Page 3 An Experimental Bead Disc Camera
Page 5 Inside LED Lightbulbs; Further LED arrays
Page 6 Cassettes, part 3 – Equalisation
Page 7 SSTV on the Raspberry PI
Page 9 Making a Replica of the Baird Televisor
Page 10 A Baird to Video Converter
Page 11 The 'Thalofide' Cell
Page 12 Work in progress

Volume 41 Number 4

Page 2 Convention 2017 Report
Page 3 Baird and the Double 8
Page 6 A Home-Made Bearing Block
Page 7 Laser Experiments Continue
Page 8 Magnification Test Rig;
       Alexandra Palace EMI Telecine
Page 9 An NBTV Camcorder
Page 11 Is There a Programme Problem?
Page 12 A Low-Flicker LCD NBTV Monitor
Page 14 Annual General Meeting Report
Page 15,16 Convention Photos

Volume 42 Number 1

Page 2 UK Local Meetings
        Message from Poland
Page 4 The Mindsets Televisor Reworked
Page 7 My View on the Baird Sync System
        Sync Separation using a Windowed PLL
Page 8 The 120-line Colour Mirror Screw
Page 12 A Timing Corrector for 120-line Mirror Screw
Page 13 Simple Photocell Amplifier and Sync Inserter
Page 14 A 240-line Nipkow Bead Disc Monitor
Page 15 A Mechanical Games Console
Page 16 G2TV station; First telerecording; Paul Revele

Volume 42 Number 2

Page 2 Local Meetings Reports
Page 3 A Low-Cost Digital Camera in the 1970s
Page 4 Calculating Centripetal Force
Page 5 Synchronisation by Differential
Page 6 Blowing Holes in NBTVA Standard Video
Page 8 Optical Sync Mixing – an idea revisited
Page 9 An FM Modulator for Additional Cable Channels
Page 10 Three Television Mysteries
Page 11 'Rasterdyne' NBTV to 625 Conversion
Page 12 Ben Clapp G2KZ Transatlantic Transmitter

Volume 42 Number 3

Page 2 NBTVA Convention Saturday April 7th
Page 3 Commercial 30 Line TV 1930 -1934
Page 8 Some Frame-Sequential Colour Experiments
Page 9 A Glass Block as an Optical Scanner
Page 10 A Mechanical 405-line Compatible Monitor
         using a Laser Printer Mirror Polygon

Volume 42 Number 4

Page 2 Zoe Bremer
        2018 Convention Report
Page 5 UK Local Meetings
       The Birth of Noctovision
Page 7 Baird Televisor Project
Page 8 A Desktop NBTV Monitor
Page 9 Websites Recommended
Page 10 The OV7670 Camera Module
         Predominant Frequency Sync for Archive Material
Page 12 NBTV Cassette Recording Returns Home
Page 14 A Disc Down Conversion Experiment
Page 15 Motor Case Sync – CMOS Version
Page 16 Watch This Space!

Volume 43 Number 1

Page 2 Local Meetings Reports
Page 4 Did anyone try … Magneto vision?
Page 6 405 Line Vision and Sound Modulator
Page 8 A Multi-Resolution Converting Monitor
Page 11 A Sync Pulse Processor
         A Variant on our Trusted Club Motor Controller
Page 12 Hints and Tips
Page 14 A Phase-Linear High-Pass Filter
Page 15 An Early Active Governor

Volume 43 Number 2

Page 2 NBTVA Annual Convention April 6th
        Peter Smith
Page 3 The Mark 2 Banquo Monitor
Page 4 Mechanical Scanners Template
Page 6 NBTV to Video Converter, Dual Standard
Page 9 A New Material for Scanning Discs
        Cassette Deck Woes
Page 11 A Time Base Corrector for Cassette NBTV
Page 13 NBTV Signal Conditioner Revisited
Page 14 Practical Construction Hints and Tips

Volume 43 Number 3

Page 2 NBTVA Annual Convention Report
Page 4 Colour Television over a Light Beam
Page 6 My Flying Spot Scanner
Page 8 NBTV to Video Converter, Dual Standard Portrait Version
Page 10 Experiments in 32 Line Synchronous Television
Page 12 A Minimal NBTV Camera on Test
Page 13 Sync Defender Maintains Frame Lock
Page 15 A Mechanical Slow-Scan Camera
         Crater Lamp Substitute
Page 16 A Simple Reduction Drive

Volume 43 Number 4

Page 2 Annual Convention Saturday April 25th
       My Experience with Mirror Drums
Page 5 Portagubbins for Multiple Monitors
Page 6 Solderless Breadboard Construction
Page 7 An Analogue time base Corrector
Page 9 Grinding an X-cut Quartz Crystal
Page 11 Mini Television 625 to 405 Conversion
Page 12 Hints and Tips
Page 13 Midlands & North UK Local Meeting Report
Page 14 Flying Spot Scanner
Page 15 Remembering Peter Smith

Volume 44 Number 1

Page 2 Club News
Page 3 Progress on X-cut Crystals & Jeffree Cell;
        A Combined DVD Player and 625-32 Converter
Page 4 The New Manila Disc
Page 6 Electromechanical time base for CRTs
Page 7 A CRT Test Bed
Page 8 Commutator Lock for Motor Control
Page 9 Moving Screen for Frame Scan
Page 10 A Hybrid 625 to 32 Standards Converter
Page 12 Investigating the Light Interrupter
Page 15 An NBTV Waveform Monitor

Volume 44 Number 2

Page 2 Karen Orton
Page 3 A Tape-Recording Pre-Processor
Page 5 A Novel NBTV LED Display
Page 6 The Transformer's Gone
Page 7 Compact Jenkins Home Receiver 1929
Page 8 Using Eprom NBTV Generators Today
Page 9 NBTV on the Raspberry Pi
Page 11 A Visual Frequency Comparator
         Televisor Display Adjustments
Page 12 LED Lightbulbs for NBTV

Volume 44 Number 3

Page 2 News and Reports
Page 3 Polygon Mirrors
Page 4 The NBTV ROMScanner
Page 7 Large Pound Shop Sensors;
        C.F. Jenkins and his Compact Drum Scanner
Page 11 Mini PCs and NBTV Standards Conversion
Page 14 Ultimate Version of my Two-Colour Driver
Page 15 Printed Circuit Boards

Volume 44 Number 4

Page 2 From the Editor
        Club Video
        Baird Websites Update
Page 3 Testing the Polygon Mirror
Page 4 A Single-board Universal Televisor Controller
Page 10 ROMScanner Revisited
Page 12 Manila Disc with Karen's Motor Control
Page 13 Storing NBTV on a Standalone Player
Page 15 Colour Mirror Screw Display
Page 16 Miscellaneous Motor Ideas

Volume 45 Number 1

Page 2 NBTVA Convention August 20th
Page 3 Before 'True Television' – new paper
        Octavisor
Page 5 Aperture Disc Scanning Strips
Page 6 The Major Radiovision Disc
Page 9 - 12 Three NBTV Players
Page 13 The Scophony Receiver
Page 14 High Speed Motors query
Page 15 Amplifier and Inverter
Page 16 Dr Alexanderson's Experiments in TV

Volume 45 Number 2

Page 2 Notice of NBTVA Convention April 15th
Page 3 Newsletter Distribution;
        Major Radiovision Recordings; Interconnector
Page 4 Sourcing Parts; The NBTV Mixamp
Page 7 A Drum Televisor in Practice
Page 10 Selenium Photosensors and Television
Page 11 Covid Lockdown Projects
Page 12 A Scanning Enigma – Solved!
Page 13 2022 Convention Report