In Reply to: RE: Preamp with high pitch whine from 1 channel posted by Cpwill on November 2, 2015 at 11:00:20:
DMM's don't have the frequency response to track the oscillation. Try just swapping the other tubes first, you might find the culprit.
Dan Santoni
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Follow Ups
- RE: Preamp with high pitch whine from 1 channel - Blackdog 15:45:57 11/02/15 (0)