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In Reply to: Why are 6sn7s noisy in one preamp and not another? posted by Trouser Trout on November 15, 2015 at 11:26:43:
If the noisy preamp has more gain than the other, then the tube microphonics will be exacerbated. Ceramic tube sockets may also contribute to this but I think you should try some 5692 tubes which have low microphonics anyway.
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Follow Ups
- RE: Why are 6sn7s noisy in one preamp and not another? - DAK 17:41:14 11/15/15 (0)