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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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