Hi Doc, I've added the 1M resistor (from Jaycar #RR0644) across the tip and sleeve on the input socket and the pop still occurs. Is this what you meant, or have I missed something? Any other ideas?
Gain and vocal mod were a success, swapped out 2 resistors and makes a world of difference.
Really happy with all the mods now, apart from this dang popping .. I should note that I have removed the led from the equation to test and that doesn't fix the issue.
Edit: have now tried the pulldown resistor on all combinations of input / output jacks. And from the circuit input and output lugs on the switch to ground. No luck.![]()