Quote:
Originally Posted by bgadow
Had you swapped the HV regulator? (I can't remember, was it a 6BK4 that early?) Maybe a bit gassy? Stabs in the dark.
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I'll try that tomorrow, but as you say it feels like a stab in the dark. I have already tried the horizontal oscillator and output, which seemed more likely because one end of the brightness control gets a negative voltage from the grid of the horizontal oscillator.
Unfortunately the horizontal circuit board is hidden behind the high voltage cage and practically impossible to get at, but I am going to measure voltages at the brightness pot tomorrow - slapping my forehead for not thinking of it before.