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#1
02-16-2017, 05:54 PM
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Great!
I'd tweak the Ion tap for max brightness rotate either way a bit then move forward/back a bit...You never know if the last setting was best (it often ain't).
__________________
Tom C. Zenith: The quality stays in EVEN after the name falls off! What I want. --> http://www.videokarma.org/showpost.p...62&postcount=4 
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#2
02-16-2017, 06:52 PM
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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 09:47 PM.
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#3
02-17-2017, 08:35 AM
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Status of the set.
I replaced the 12BH7 vert, output tube to no effect. Still has foldover. There is sound getting trough and I presume video but there is no sync. Horizontal hold is at the one extreme there is maybe 10-15 horizontal lines. Turn it too far the other way and HV cuts out and it makes unhappy noises. Vertical hold appears to keep rolling as well. I have replaced the sync separator tube with another one with no effect. I am guessing that I should check the voltages on the 12SN7 sync separator?
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