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Update #3:
Indeed, the new 6CL3 damper tube works and has lit up the screen, but nothing more. Just a white, lit up, blank screen with no audio.
Ironically, when I pull the 12HG7 video output tube out completely (the genesis of the problems in my opinion), nothing changes. Same white screen, no audio, except for the usual low frequency hum at full volume. The tube V/O lights up though when plugged in. When I wiggle it, I can hear static on the speakers and I see one of the pins (through the glass of the tube) sometimes display a small electric spark for a short time.
I've also noticed when I touch the chassis, this low frequency humming sound diminishes to some degree.
The video output tube plug plastic is cracked and pieces have chipped off. The bottom contacts for it have been re-soldered, but I think I need to replace the plug. No idea where to get one though and not sure I am good enough to replace the plug without causing more damage! ;-)
Thanks for helping solve my little puzzle here!
Carl
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