unclej Posted July 19, 2006 Report Share Posted July 19, 2006 the symptom: after this little peavey, a bravo 112, warms up it begins to make a sound like feedback only it isn't. it's a low pitch sound..approximtely a low g on a guitar. it does it with all the volume knobs tuned down. it's volume can be controlled only with the reverb control knob and once it starts it increases in volume by itself until it's too loud to stand. it does not seem to start on it's own but after a few minutes of warming up it will start once i pluck a string on the guitar. i know it's not feedback because once it starts it continues even after i unplug the guitar. troubleshooting so far: i've checked the electrolytics and replaced all of the tubes one at a time with known good ones to no avail. i've tested and cleaned all of the control pots and they seem to be functioning properley. before i started checking resistors and such i thought i'd see if one of you might have experienced the same thing and whether or not you think it could be a symptom of a bad reverb can. personally i'm still betting on a poltergeist. thanks for any help. john Quote Link to comment Share on other sites More sharing options...
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