Quote:
Originally Posted by old_tv_nut
Another thought is to float a VOM across the cathode and G1 so you can see any differential drift on a sensitive scale. (Just be careful to have it on an insulated surface and don't try to touch it while in operation!)
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I've tried all your suggestions. But for this last one ...there is a problem.
That is, there are big blanking pulses on both cathode and grid. This means that the voltages measured on a voltmeter are not necessarily representative of
what they are during the active scan time.
I will retry this evening with the two blanking pulses disabled. And I will
look at the two pulses with a scope and see if they drift.