I have an original Hotfoot and it's my favorite OD
It has developed a loud "POP" when activated, but only the first time, then it's fine as long as it's left "on", but if left "off" for 15 minutes or so, it will POP again when turned on.
It's NOT the switch, which are known to be wonky anyway, because I'm leaving the onboard switch always "on" and bringing it in/out of circuit via a looper.
I suspect a cap is leaking, but not sure where the most likely culprit is....I don't want to just go in and replace all the caps, but would like help narrowing down where to start looking/measuring for a voltage leak.
I guess it could also be one of the J231 transistors(?)
A clue.....it does it whether the onboard switch is activated or not....IOW, even if the switch on the unit is off, and only the buffer is active, when the looper switch is activated, it pops.
Here's the schematic....any help appreciated ;-)
Geezer