Soloman Tump wrote: ↑Thu Jul 30, 2020 1:23 am
My electronic diagnostic skills are somewhat still lacking but I assume its a stray wire touching the case on the inside? I might take it apart and have a look?
Could be a lot of things.
I wholly support the notion of taking it apart and setting eyes on it.
Could be a PNP based circuit built in the way of placing Vcc on the shell instead of common.
So I took the back off and had a play around. Tightened up the in/out ports which were working loose.
On the pcb there was a 3 pronged "thing" that was very loose in a row of 5 terminals. I wiggled it about and made it s tighter fit. Hey presto, awful humming noise gone and it's back to being a fugly fuzz pedal as intended. Not sure what it was or why it worked but it has. Job done.
Three legged thing sounds like a possible transistor, and those SIL sockets are popular with some builders because it allows them to try out different parts and fine tune things.
You have already discovered the downside of friction fit build methods.