Building an Antique Televisor
Posted: Tue Dec 08, 2020 10:00 am
I'm in the planning stages of a new project-- building an authentic-looking Televisor (sans case) that is relatively easy to construct and with a design that others can copy, based on the instructions given in Television for the Amateur Constructor. The motor will be a dual shaft universal motor just like the original, powered by the mains through a resistor or triac dimmer, and the lamp a series of LEDs just like a modern monitor. The trickiest part will be recreating the sync equipment. I would like to keep the toothed wheel, the difference being that the gear will be fed only by the amplified sync pulse extracted from the video signal. The sync assembly will not rotate. For framing, the separated sync pulse will be delayed electronically, using a circuit based on the one designed by Peter Smith for the transatlantic tests in 2003. However, I re-read Peter's analysis of the Baird sync setup in Vol 38 No 1 and am now wondering if this is feasible. I know very little about designing an amplifier to feed a coil in this way, and it now seems just using a brief pulse will be inadequate. Any thoughts on this, or who I should talk to?