In Reply to: Fixed bias problem, and no, it is not the tubes. posted by DAK on January 11, 2017 at 18:00:49:
What value are the grid resistors? If they are too high that can cause problems. For the KT-120 with fixed bias the max is 51K - so if you have higher than that it could be the problem.
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Follow Ups
- RE: Fixed bias problem, and no, it is not the tubes. - Jim McShane 19:55:11 01/11/17 (3)
- RE: Fixed bias problem, and no, it is not the tubes. - DAK 20:17:20 01/11/17 (2)
- RE: Fixed bias problem, and no, it is not the tubes. - Jim McShane 05:17:23 01/12/17 (1)
- RE: It is the same circuit as on the other amp - DAK 09:26:57 01/12/17 (0)