I made myself a clone of a Green Russian Big Muff from this layout. It sounds great when it works, but it has a weird problem with not sending any audio out sometimes.
In true bypass mode it works fine 100% of the time.
If I plug it in and press the foot switch, half the time it works perfectly and half the time there's just no sound.
When it's not working sometimes tapping it gently on the floor can get the audio going. Once it's working, you can play it forever and it won't cut out. However next time you click it off and back on, it may or may not give any sound.
Because of this I thought it might be a problem with the switch, but in either case the LED lights up so I'm guessing that means the switch is working?
Can anyone suggest where I can look for the cause of this intermittent lack of sound? I'm thinking it might be something mechanical, because of the tapping "solution", but nothing appears to be loose and I can't see any shorts anywhere.
Thanks in advance!