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I agree Tom but have double checked all of the electrolytics, I replaced them all with new ones during the resto. I have replaced all of the tubes that would have any effect on it with NOS tubes one at a time with no improvement. The service literature does not provide any waveforms so I don't really know what a normal waveform should look like but I will check the power feeding the horizontal sub-chassis for ripple.
Gregb
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