21-CT-55 power supply failure

[CT-100]

Yes I can make the measurement, but this again, is going to take a few days. My primary delay is that I have not powered my chassis up since I am working on the CT-100. I am aware of your request and will do what I can as quickly as I can. If you lived in my neighborhood, I'd give you my chassis and you could take it to your lab for precise comparisons.

I have a lot of background with this particular set as my dad brought 5 or 6 of them home as they became obsolete; one even had an IF-RF problem like you have described. We're talking 1968, so I have to review the schematic and try to reverse engineer the solution he discussed with me. (I couldn't work on sets then, he did and I only watched the process)

If the grid bias is too high, then the grid current must be too low [OR] the tube is being over-driven. I need to get my diagram; is there a cathode resistor in the deflection output; if so, is it by-passed? I will look this weekend for sure.

I'm max'ed at work and have not fairly studied the responses ahead of this, so forgive me if I am repeating suggestions. I admit, I have not done my homework yet so please take these comments with that in mind.

Regards.