when i lift the needle off the record, i sometimes hear "tube ringing"from the left speaker..i tapped the 300b tube with a q-tip (lightly) & i can hear the microphonics. any way i can take care of this??? Do they make tube dampers for 300b tube? Who? Where? thanks...
It may well be the 300B; however, it could be your driver tube. Consider swapping, left to right, your 300Bs and recheck the ringing issue to rule out another source. Jim.
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