GT20 power supply loud hum

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canyonsound
Great Britain
Posts: 2
Joined: 24 Oct 2019 10:46

GT20 power supply loud hum

Post by canyonsound » 24 Oct 2019 10:50

I just wondered if there was any way to cure this? I have a fair amount of hum without power connected but useable, however with power cable in, it's unacceptable. I've checked continuity of earthing but I can't manually find any wire connection which cures the power supply hum. Any advice greatly appreciated. Thanks, Nick

canyonsound
Great Britain
Posts: 2
Joined: 24 Oct 2019 10:46

Re: GT20 power supply loud hum

Post by canyonsound » 24 Oct 2019 16:43

Ha! The cartridge was wired out of phase!! Green/red switch cured it.

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