First power up was a partial success in that I got a picture but no sound.
Further investigation revealed a cracked 6AT6 that had gone gassy but still had filament continuity.
Picture was still a bit dim and weak though. Bypassing the old selenium rectifier helped a bit.
Eventually, I tracked down a bigger issue - an open peaking coil. Luckily, a little soldering touch up on one end restored continuity.
That improved the picture quality and brings me to what I hope is the final issue - poor horizontal stability.
I think this series of images taken while using a 7VP1 test CRT illustrates the problems.
Adjusted for a good picture.
A short while later tearing appears. Tweaking the horizontal hold will get rid of it for a little while.
A bigger issue occurs when there are large areas of bright and dark. Seems like the video is causing a horizontal offset. This set does have DC restoration that uses an average of the video signal as a grid bias. Seems like that might be leaking in to the horizontal circuit somehow ? Tough to track down since it's not always a problem.
