Help with zener diodes in JCM 800 circuit

Ricky Rockhardo

Ricky Rockhardo

Active member
I came across a simple diode circuit schematic where two diodes (in series) get wired to the output tab of the MV pot and then to ground.

I tried it out with some alligator clips and it def drops the volume quite a bit, but it doesn’t seem to add much gain.

Am I doing something wrong? Are there other simple options I can try before busting out the soldering gun?

Also, for reference, my amp has a PPIMV, so if there is a way to clip the diodes there, that might be cool.
 

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