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The midboost on my M4 is making a "wind on a mic" sound. I say that it's the midboost because the noise occurs with or w/o the pickups turned on, and as I turn the boost up at the knob it starts to occur, when I turn the knob down the noise goes away and becomes more of a hiss. I replaced the stereo jack thinking that may be the issue but apparently not. About halfway through the knobs travel it transforms from a hiss to the windy sound. I'm now thinking a bad component on the board. Would this board be able to be rebuilt (as in copied on another board) from scratch with ease? I could also do a complete shotgun replacement of the resistors, caps, etc. Not sure about the opamp though. Any thoughts? Thanks!
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You might try replacing (or at least cleaning) the pot before touching the board. The midboost control pot is a linear taper 50k pot. Also double check the volume pot (audio taper 50k), because the noise you describe sounds like a noise mine will occasionally make if I slam it wide open too hard, and this noise also will happen even if all the pickups are off. -
I checked the midboost pot, it says A-50K, which I assume means audio. It's also longer than the other two pots. I'm thinking a replacement at some time?Comment
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The pot attached to the board itself is the volume pot, which should be A-50K. The midboost control pot is the third one, the one closest to the lower bout of the guitar, and it should be stamped B-50K. If the third pot is stamped A-50K, you're probably right that it has been replaced. Not sure if that in & of itself would account for the noise, but it's a starting point.Comment
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The midboost is def initely stamped A50k. I've checked some photos of other M4s and I believe this is a replacement. I'm going to order another and start there.Comment
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Cool. Hope it solves the problem & the board itself is OK!Comment
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