Okay, here's a showcase of where I am. Sorry for the long video, I was trying to capture everything that came to mind.
Highlights are:
The new video output tube seems to have cured the issues with those bright lines and the signal loss.
I'm noticing some odd behaviors on channel 8 and 9. 9 got better over time, but the static seems dramatically different on 8 from how it appears on the other channels. I showcase that in the video, but that may be normal.
There's a lot of noise in the picture even when I have a stable input signal. It appears to be a sort of cycling movement, scrolling up, and then scrolling to the side. I'll check a few more signal sources to see if that changes depending on the source, but someone else may recognize that issue.
As I already stated, the vertical wobbles when I lower the brightness, and the picture changes size.
There's audio buzz that I'm noticing, but that may also be a signal thing. It's not AC hum.
The color is off. I know the screen needs to be adjusted, but I'm noticing that the colors also seem to be out of alignment and following the cycling movements I mentioned before. I'm not sure if that's an alignment thing or a sign of a problem.
This isn't showcasing flesh tones yet. I'll need to grab a DVD player and set that up. I'll plan to tackle that this weekend. Right now I'm just focusing on picture stability and RF noise. I guess at this point I'm calling the picture "stable" but I feel like it could be better.
Video:
https://youtu.be/XHZcKReAZ6A