Coming from the lobby we enter the exhibit room and we see already several
exhibits on the tables. Members are showing and demonstrating the equipment
they made last year and previous years.|
Let's take a short tour through the room to see what is shown this year.
If we turn around by 180 degrees and look down we see Dave Gentle in discussion with
Here he explains the working of his mirror screw monitor, which he showed this year in working condition.
Then continuing to the left we come to the table of our Dutch member Klaas
He showed his disc monitor, seen from the back and opened.
In the centre we see the vacuum tube 29 MHz transmitter as described in Newsletter 29/2 and at right a tube receiver in mirrored lay out under construction.
This quite normal Nipkow disc type monitor has Red, Green and Blue LED's in the
light box in stead of the orange or white single colour LED's that others use
in their monitors.|
RGB signals are stored in a digital way on a CD-R. A special circuit retrieved the analogue video signals from the digital data of the CD.
Here on the left you see the picture of his monitor, which was however not as bright and flicker free as we see on this enhanced digital photograph.
|Then in the corner we find Peter Smith' table.|
His video camera televised the persons looking into his replica of the Daily Express disc monitor. The video was converted into 30-line NBTV format and via a RF-path fed into the monitor. In this way you see yourself.
|Peters transmitter was a small transitorised circuit, but the
receiver was a replica of the original Baird receiver, see at the left.|
In the interior of the fine replicated cabinet Peter made also a replica of the original receiver using original type radio lamps and in the original Baird circuit diagram.
|Then we come to the exhibit of Graham Lewis.|
Graham made a tower of converter boxes. On the two monitors an NBTV picture is seen (centre) and a to CCIR-scan converted picture of the same source on the right.
The short video scene came from Read Only Memory.
|These are Grahams converters:|
NBTV 32 line to 624 line converter
6 bit 625 line to NBTV converter
NBTV ROM test generator
NBTV download ROM
NBTV frame rate converter
12,5 to 50 Hz
NBTV 6bit PC display
and everything with its own power supply.
|Next to the Baird replicas Dennis showed us his replica kit for
building a replica Daily Express monitor.|
The kit comes in a fine large cardboard box.
When we open the box we find all parts packed carefully in labeled cardboard wrappings to prevent damage during transport.
|All parts are made with the greatest care and precision.|
As far as possible the documents on how to assemble the kit are made in the original style.
To sum up a most enjoyable day, one to be repeated next year.|
We hope to see even more members at that occasion.
Special thanks go to Chris Lewis, here photographed secretly during the enjoyable English breakfast type of lunch in the nice "canteen" of the university.
He organisied all the contacts with Loughborough University and made it possible that we could have our Convention in this technical surroundings.