Hello

1.) are the power supplies and the rack rails connected to ground
2.) is your studios power distribution wired as star system It must be
based on a single wall outlet socket and then a central power "multiple"
(I don't know the right english word for that, sorry). Or you must be
very sure, that all wall outlet sockets are based on the same electric wire.

Florian


Am 12.06.2016 um 14:22 schrieb 'Scott Rogers' scott@...
[Doepfer_a100]:

> HI
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> Thanks but that’s a very dangerous idea and not really a solution. There has to be some explanation of what’s going on and a much better, permanent solution.
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> Scott
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> From: Doepfer_a100@yahoogroups.com [mailto: Doepfer_a100@yahoogroups.com ]
> Sent: Sunday, June 12, 2016 8:00 AM
> To: Doepfer_a100@yahoogroups.com
> Subject: 1 Re: Loud ground loop hum
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> Hello Scott,
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> Try to disconnect the Doepfer mains from earth.
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> Jacco Ville
> The Netherlands
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> Posted by: "Scott Rogers" < scott@... >
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