In Reply to: RE: OK- its an older 12-tube model posted by ChasLieb on September 28, 2015 at 18:52:46:
I think you need to leave the input and driver stage tubes (6SN7s) in place when measuring the output stage grid voltages. "410" is not plausible for grid voltage wrt ground.
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Follow Ups
- RE: OK- its an older 12-tube model - Lew 06:42:09 09/29/15 (0)