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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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In Reply to: Tube Noise...? posted by pomole on September 29, 2000 at 11:31:40:
PM,Now, I remember... It was a duo-triode tube that was bad. Either the phase splitter or the first stage pre-amp. And since you said both channels are "breathing"---try changing out your splitter and see if that works. Hope have a good spare.
It happened to one of my guitar amps---where at low volume, you'd hear a pumping noise---even on the clean circuit. Once you turned the volume up a bit---it would go away.
I believe I replaced the stock Groove Tube 12AT7 with a GE 5-Star 6021---and never had that problem, since.
Good luck. Hope this works for you.
steve
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Follow Ups
- quiet pumping or breathing noise---possible cure - steven oda 00:21:23 10/01/00 (1)
- Oops! - steven oda 00:34:08 10/01/00 (0)
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