[codefox1]

Should be able to tell which chassis is dropping the ball, the tuner or the amp. Judging from former posts, looks like you have done excellent restoration work. So it's probably something small. As for voltages, take a look in the tube manual to see if what you have is reasonble.

I would work backwards from the speaker to the antenna after checking the powere supply dividers; I think that's what most of us do it.