I finally had some time late last night to pull the back off this set and do some investigating.
First, I took a look at the metal tabs pressing against the aquadag coating and they are both making good contact. They are attached to the metal band running around the CRT which is bolted into a metal frame running around the front of the set. All that looked fine.
Then I noticed that the metal CRT frame is separate from the metal TV chassis. They have to be connected somewhere. Eventually, I noticed a missing bolt that connects the two together. Replacing that solved the problem
Another issue is bad horizontal hold. It takes a few second after power up for it to lock and the control on the back of the set is very touchy.
I did the obvious thing first and retested the tubes. Right away I found one half of a 6CG7 completely dead. Weird. The filament is glowing but it has 0 emissions. I replaced it and the sync is solid now
