Narrow-bandwidth Television Association

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Kevin Hadfield's LED scanner


The big surprise of this years Convention: Kevin Hadfield's remarkable four-quadrant LED scanner.
Picture of Karen Yanczer Wooden bars, experimenters boards, drum assembly from an old VCR and some more electronics out of the junk box, completed the evening before the Convention, rotating at a moderate speed and giving a clear picture of Karen Yanczer.

Beneath the LED scanner photographed with and without fast electronic flash.
Rotating LEDs


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