SOLVED Static with guitar volume at 0

D

DS13

Member
On a couple fuzz pedals (FF and one knobbers) I've built on vero, I get a static or whooshing sound with the pedal engaged and guitar volume rolled back to 0, others I don't have this issue. All work great, besides this anomaly.

I've checked, rechecked and reflowed solder joints, but it doesn't help..

I am wondering, is it possible to overheat the power filtering cap, such that it is noisy with all signal to ground? Thinking later when I have a few mins to swap one out and see.

If it was happening on every build, I would say it was a "feature", but seems to be me or a component..

Any ideas?
 
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Add a resistor in series with the input, somewhere in the 1k to 10k range, and it ought to go away. Some input stages (and/or circuit layouts) just don't like being completely shorted to ground.
 
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