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#9
09-11-2016, 07:25 PM
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As promised, more photographs of the set....
               I've determined that this set does in fact use the later FM circuit as I had originally thought. The 6SQ7 socket was rewired for a 6SN7, a 7 pin socket was added for the 6AL5 diode, and the 6V6 and sound IF tube, the 6AC7, were left as-is. This set also has the later sync circuit which changed both the vertical and horizontal sweep circuits. The vertical and horizontal oscillators were changed from 6SN7s, to 6N7s. Luckily these changes to the kits were documented in the J.F. Rider's data. Now for the worrisome part: the tuner. I have zero documentation on this thing, and I've never seen another like it. I strongly suspect it was Transvision specific. I hope to hell there isn't anything wrong with it, otherwise I may have to bypass it and the IF strip entirely and feed video and audio from line level into the set. Tuner repair still scares the hell out of me... The power supplies, to answer init4fun, are pretty straightforward. The big transformer on the rear is a 750 VCT transformer for B+ and filaments. The B+ is smoothed in part by the smaller choke nearer the front of the chassis. The small transformer on the opposite side of the chassis is the HV transformer. It supplies 1700 volts at 4 mA of current to a 2X2 halfwave rectifier, in addition to the 2.5 volts for the 2X2 filament. 
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