RCA 8TS30 Negative Image

[Chris K]

Just tried it. The issue is still there and I think it's the contrast pot. I have to turn it 2/3 of the way down to get a non-negative display. Wiggling it causes it to be intermittent. It's been cleaned with Deoxit Fader as have all the other pots. All NOS tubes. The picture is very twitchy both in the horizontal and vertical. I have very rarely gotten a steady pattern. Seems to be sensitive to many things...moving the tuner knob...pulling and rocking the vertical and horizontal pots etc. Maybe it's a bigger systemic issue? IDK. The only caps I haven't replaced are the safety caps off the line.

I still have the big bleeder resistors in place including one that's a Candohm resistor. I can't see how replacing them would make a difference but at the least, the metal resistor needs to go.