10KV caps.

[JohnCT]

I decided to move along a bit on the Andrea, and brought her up on a variac. A can filter refused to reform and decided to puke itself, so I pulled the 40/500 - 40/500 and restuffed it.

I found the B+ normal and nothing running hot. The HV was around 1500v, so I checked the two 1B3 rectifiers, damper, and horiz output tubes. Interesting, this TV uses two HV rectifiers as a doubler - something I'd never seen before. I image the plan is to improve the reliability of the flyback.

The tubes checked good so I pulled the two 470pf 10KV caps I suspected might be an issue at 70 years old:



I found one reading very little capacitance and some leakage at 600V (the most my Z meter will provide) and the second one decided to become a 15 ohm resistor.

Probably explains my low HV...

I'll take the doorknob out next and check that. I'll order some ceramic caps and see if she'll run.

John