One thing I will say for GE, the solder joints and PC boards are a bit better than RCA. even the parts seem to be better grade. I guess that's not an issue when so many fewer are used than other makes.
I did re-flow solder and clean all tube sockets with contact cleaner and moved tubes in an out a few times. Between the extensive cleaning and the re-cap, I did not want any distractions from what is really wrong. Anymore, I don't even power up an unrestored set unless I suspect a bad flyback or some other issue that makes a recapping a poor investment of time.
But I should poke prod rap and tap to see if something is loose. The picture is from the previous owner on Long Island and its obvious why it was moved to the garage.
GE as found.jpg