Hello folks,
I have this Mini-Brute on the bench. Syntoms: even without anything plugged in, it hums very loudly both on the "clean" channel and the "overdrive" channel. But when plugging in an instrument (or a signal gen) in the "fx input" jack, using the "fx gain" knob and the master volume at maximum, I have zero hum (I'm referring to the chrome jack under the "FX LOOP OUTBOARD" lettering).
So I think the problem lies in the preamp section before the master volume stage U3A. Visually checked for broken wires, solder connections, leaking e-caps, etc etc but found nothing. Any thoughts?
I have this Mini-Brute on the bench. Syntoms: even without anything plugged in, it hums very loudly both on the "clean" channel and the "overdrive" channel. But when plugging in an instrument (or a signal gen) in the "fx input" jack, using the "fx gain" knob and the master volume at maximum, I have zero hum (I'm referring to the chrome jack under the "FX LOOP OUTBOARD" lettering).
So I think the problem lies in the preamp section before the master volume stage U3A. Visually checked for broken wires, solder connections, leaking e-caps, etc etc but found nothing. Any thoughts?
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