In Reply to: there are 2 ratings: heater positive and heater negative posted by Chip647 on June 16, 2020 at 19:47:29:
As I shouldn't look at these things late at night. My Amperex data sheet is incorrect. Page two is actually from a 6CG7. Never noticed before.
So you are correct, and that is probably the OP's problem.
I'd like tom know what preamp it is.
Dan Santoni
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Follow Ups
- RE: there are 2 ratings: heater positive and heater negative - Blackdog 12:57:31 06/17/20 (0)