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I was working on my Pilot yesterday to see why it always showed hum in the picture
and the horizontal sync broke up if the contrast was too high. It has always done this.
It turned out to be my mistake .. a 6BA6 with a very mild case of heater-cathode leakage
was in the last IF amp socket and a good 6AU6 was in the video amp socket. That's
backwards. Moving the 6AU6 and a new 6BA6 almost fixed that. The remaining hum
is probably capacitave from the series heater string.
I also needed to tweek the audio IF trap so I looked under the chassis.
My set, which has good linearity, is using two .02 uF 6 kV ceramic caps in parallel
for each vertical deflection plate coupling.
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