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Old 18th Oct 2019, 12:37 am   #49
joebog1's Avatar
Join Date: Jun 2015
Location: Mareeba, North Queensland, Australia
Posts: 1,249
Default Re: Cretinous idea - The combined volume pot and mains SW.

Back to the title of this thread!!

I have worked on guitar amps that have the tremelo pot ganged with the mains switch.
This is mounted smack bang in the middle of ALL the pots.
It does cause hum. My method of curing it ( ALMOST completely ) is to wire the on/off switch in balanced microphone cable. The two conductors obviously carry the mains voltage, and the screen is connected to ground at the feed end. ( IEC socket/mains cable etc )

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