#46
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When you say output of first sync amp is 75 volts, is that 75 DC or peak to peak?
Schematic says the plate (pin 8) DC should be between 163 and 185 v dc depending on picture setting. Peak to peak should be 40 volts pp horizontal or 58v pp including the vertical pulse. I don't see where you got "should be 35." Is that a typo from the input to the sync separator (which should be 35)? |
#47
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You're right. I misread that part about should be 35 volts. I'm getting 75 volts peak to peak, and yes, it's the Rider's Manual. I tested my recently purchased 6SK7 tube, and it was barely good. The original was a little better, so I popped it in. The stability has improved to the point where the horizontal roll can be stopped for a longer period of time. I still have a slow and steady vertical roll though. Maybe I ought to buy another tube.
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