Build Your Own Clone Message Board

Hi all. My Mimosa squeels/oscillates when engaged. It starts when I turn the bias to where the guitar is audible I've reflowed all the solder joints and looked after misplaced components, but I can't find any. Anybody know what could be the cause of this?

Component placements look good and your soldering quality looks very solid. I suspect a bad IC or transistor, but the best way to pin this problem down would be with a signal tester. Something else that could be helpful would be to measure the DC voltage levels on the IC pins and the legs of the two trannies and report them here.

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“My favorite programming language is SOLDER” - Bob Pease (RIP)

My Website * My Musical Gear * My DIY Pedals: Pg.1 - Pg.2

Ok. So I need two different devices to measure? I don't have anything to do that, so I guess I'll have to ask around. Does anyone know how the BYOC policy is, if I eventually find a bad component?

I'd check the voltages first, which will require a multimeter. Borrow one if you can, though it's an invaluable tool if you plan to do future DIY electronics projects, and you can get a very serviceable one at Harbor Freight for $10 or less. If that doesn't turn up a problem, then the signal tester would be the next thing to try.

_________________
“My favorite programming language is SOLDER” - Bob Pease (RIP)

My Website * My Musical Gear * My DIY Pedals: Pg.1 - Pg.2

Still trying to find the gadgets to measure, but I just tried it with a battery instead and the noise was gone. So have I maybe wired the power wrong or could something else in between be the culprit?

Usually, if changing to a battery kills the noise, the issue is with your power supply. There aren't any differences between power supply and battery inside the pedal, meaning the connections are mechanical. No components apply to one method that doesn't apply to the other. If you have other power adapters, give them a try or order a new isolated one (typically about $20 or so for a single PS).

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The tone is in my hands?!
Email: nick@buildyourownclone.com