RCA CTC-11 Restoration

[wcarroll]

Spent a little time with the set today:

I would check the R-Y output circuitry. It may be good to try a scope on the red CRT grid lead and try and trace the AC signal back through the output tube to the demod as this may not be a DC voltage issue.

Chad, I have a scope here but can't find the probe... I went ahead and just checked the AC voltage on the grids with my multimeter. The green and blue were showing around 21-25 VAC. The red actually decided to work momentarily and I was able to measure around 18 VAC on the red grid. When the red faded out, the AC voltage dropped to around 14 VAC.

The chroma section is not on a PC board and is all mounted under the chassis. So, I guess the chassis is coming back out of the cabinet.

BTW, switching the 6CG7's didn't help anything.

I don't think this is your trouble, as RCA started using "mylars" in subsequent chassis,

Kevin, You are right. I don't see any wax caps anywhere.

Thanks!