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I notice that there is some vertical foldover at the top of the raster.
The Sams says check 12BH7 VOT.
One side checks ok and the other is in the yellow ? range. Could this be the cause.
The ion trap was right where it should be which means low HV or weak CRT (maybe it needs to "cook" for awhile)
BTW I think I figured out why the tube was glowing blue. I had swapped the 6SN7 osc tube with another one from the set. Maybe the oscillator is picky?.
Last edited by Mre12ax7; 02-16-2017 at 08:47 PM.
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