Loud "Pop" when turing on Muffler distortion mod. Why?

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legionhwp
 
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Joined: Mon Apr 20, 2009 2:01 pm

Loud "Pop" when turing on Muffler distortion mod. Why?

Post by legionhwp »

I installed a simple version of the muffler distortion mod today and when I engage it there is a loud Click or "pop" which is audible through the output. It sounds like a grounding issue but I'm not sure where I went wrong. Here's what I did:

I used a SPDT switch and wired ground from the case to the center (2) pin.

Pin 1 goes to a silicon diode (with -> soldered on the pin)
Pin 3 goes to a gemanium diode (with -> soldered on ther pin)

A wire from c38 negative goes to the other end of each diode so it looks like this:
(see pic)

I don't have anything going to the volume pot (VR8) and I'm not clear on the one diagram how else c38- should be wired.

Any ideas what's going on? The diodes do work and the distortion is rather nice (I tried out a dozen combos and went with these two as they were the most different from each other).

I will say both lose a LOT of bass signal. Also ironically the seem to sound better and have more affect when the bass boost mod is off.

Any help appreciated.
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