Quote Originally Posted by Bakersdozen View Post
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.

The Sleeve connection is actually the one to the left of the middle one, the middle one is the ring connection, shouldn't make much difference though since the middle and left connection get shorted together when you plug a 6.5mm Tip/Sleeve plug in it, I'll have to do a bit of thinking to figure out what else could be causing the popping sound.