Originally posted by guittube
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Hum and buzz
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WARNING! Musical Instrument amplifiers contain lethal voltages and can retain them even when unplugged. Refer service to qualified personnel.
REMEMBER: Everybody knows that smokin' ain't allowed in school !
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It might simply be that that stage or the preceding one is very gainy. I did everything I could to reduce hum by improving grounding on my reverb recovery stage, but it turns out I simply had way too much gain on the stage. So much that the tube itself was microphonic and picked up noise everywhere.
Fixed that and reintroduced NFB and found the amp to be whisper quiet.
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