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In Reply to: RE: NOS GE 211 tubes... Squeak on startup posted by miguelito on June 6, 2016 at 07:00:13:
I've built SET amps with 211s, but never had any issues with instability. Assuming this really is an oscillation, it's possible power supply decoupling has deteriorated over time. You may have capacitors that are no longer performing as intended, and the gain of NOS tubes is simply revealing the need for replacement. That's just a guess, of course. My suggestion is that you find a reputable shop that can diagnose this.
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- RE: NOS GE 211 tubes... Squeak on startup - Triode_Kingdom 06:09:01 06/07/16 (0)