Re: Cretinous idea - The combined volume pot and mains SW.
If we are concerned about hum resulting from mains live wiring then twin-core mainscable with an in-built screen is available. This has the advantage over mic cable that it meets the regulatory requirements for mains operation. Otherwise sliding copper braid over the outside of ordinary mains cable also works. It doesn't fix the problem of noise from the switch mechanism itself leaking into the volume pot track, of course.
Cheers,
GJ
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