Admiral 12x12

[rbc7snc]

MadMan-

That's some really good information.

I'll take yet another look at my solder work. I once restored a VFO for a vintage Viking transmitter where the only way I was able to fix an intermittent problem was reheating every solder joint in the box. As Murphy's law would have it, the problem was somewhere in a group of joints that were all but un-accessible.

Your pot comment may be prescient as well. It seems the problem is intermittent now, and I've run into pots that fail intermittently under load. The pot checked out on my DMM, but I've seen pots that look fine on a DMM and don't work in the circuit. A friend of mine recently worked on a radio with a bad volume control. It checked out just fine on my DMM, it was a little jumpy on a VTVM, and it failed miserably in the circuit. The vertical linearity pot is part of that circuit and very easy to change out.

I deeply appreciate all of the comments on this thread and I'll keep you guys posted with what I figure out. As I've said before, it's my first TV restoration, so I don't have the same level of experience as I do with radio work.