Finished recapping the i.f. chassis tonight so I decided to give it a full power up, everything's connected except the Audio Amplifier, that is a separate unit and I don't think it needs to be in place for the set to work.
I put the CRT in a plastic container, must be High Dielectric since it didn't arc through.
First try I got a line on the screen followed after a couple seconds by a shutdown, probably the protection circuit kicking in to prevent a phosphor burn from lack of sweep.
I did a little poking around and didn't see anything obvious, then it occurred to me to check the 5U4's in the power supply (there are three of them!), sure enough one of them was stone cold.
I had been having some trouble with them lighting up before because of bad or dirty sockets, I wiggled it a little and it came on so I gave it the juice again, now I have a full raster!
The focus looks terrible and I have no control of the brightness, it's the same no matter what control I turn, I do get some flashing when I turn the tuner (one channel in particular with the Agile Modulator broadcasting) so I think it's passing a signal all the way to the CRT, I just can't see it because it's washed out, can't hear it either because no amp hooked up.
Anyhow I've had enough X-Rays for tonight, at least it powers up now so I just have to figure out the rest of the issues and finish the cabinet.