Master Volume Pot Value and Taper?

inertian

Getting a 1978 65 Reverb Head ready to gig for a local guitarist, got it cleaned up and biased, but noticed the Master Volume acts like an On/Off switch - completely on at 0 - 9, competely off at 10. Checking the pot, I see it's a later replacement, 1M audio taper. According to the schematic, it should be a 10K linear taper.

Before I replace it, did MM ever use a 1M audio pot as a Master Volume control? If so, I'll recheck the wiring and pot itself to see if either is damaged.

Thanks.

Full Name
Ian Azrikan

Member for

11 years 10 months

inertian Wed, 03/06/2019 - 22:58

I opened up another 65 (early 210 combo) amp I have onhand to recap, and sure enough its Master Volume is a 1M audio pot. Noted that it's connections (three wires) were in a completely differently order than the one in the 65 head. Changed the wiring of the pot in the head, and problem solved!

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