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Well. Things just took a sour turn.
As noted above, the video output tube looked like it was running hot and had a very wrong voltage on pin 9. Doing resistance tests showed a problem between the 280V source and the main PCB. I discovered that R33, a 3.9k resistor had very high resistance. I swear I checked and it passed when I was under the chassis. Replaced it, got good voltages and the best picture I have had. Not great by any means but better. While I was admiring it, about 10 minutes into the run, smoke and flames erupted from the flyback wires. Sigh. I had been playing with the focus wire that has two possible positions but that's it.
So, now I need a new flyback and to find out what blew the original. As it will be very difficult to find an exact replacement, any suggestions as to something that will work? This isn't a museum restoration, just a set for occasional use.
Argh!
Jonathan
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