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Humbucker Screeching


Lefty
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Well last spring I built a guitar. Everything's pretty cool except the humbucker screeches when the amp is turned loud enough for band practice. The pickup is close to the bridge. The guy at the shop I bought it from figured it was jap-made in the 80's. I don't know if it screeches because of its positioning, if it's just defective, or if it's the way I wired it.

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What do you guys think? If it's the position, I guess I'm screwed. If it's the wiring, guess I can fix that. If it's the pickup, I'll probably buy a new one.

Edited by Lefty
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My guess would be that the pickup is microphonic. This means that the windings are loose. So, when your amp is up loud, the windings vibrate, causing feedback. Its a bit like holding a mic to close to the speaker. Check out http://www.guitarnuts.com/technical/electrical/index.php . It has information on potting your pickup, if you decide that's what you want to do.

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