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Reporting question for Potentiometer - Marshall, Linear, 16mm

Potentiometer - Marshall, Linear, 16mm

Will this work as the gain pot on a JCM900?

We are unsure if this will work in your amp. If you pull the pot out of your amp, you should see some lettering at the top of the pot. It should either start with the letter B or A. B is a lineal pot and A is an audio taper pot. The next number will tell you the resistance such as 1M (1Meg), 10K (10 kiloohms), etc. With these characters you will be able to determine exactly what is in your JCM 900.