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nathanscribe



Reged: 19/01/07
Posts: 818
Loc: Yorkshire, by 'eck.
Re: Yet another ground loop query...
      03/02/12 05:09 PM
I did the whole "unplug and start again" thing with both audio and power connections, and found that no hum was present on the audio signal unless any of those three particular units was plugged into the power. No other units in the rack hum. Bizarrely, when the offending units are plugged in (again, power only, no audio connections) there's hum on the mixer's Aux send 4 too - which means I get a permanent reverbed mains drone...

Removing the three offending articles form the power supply cures the problem.

All my cables are home-made to fit using Van Damme cable and Switchcraft/Neutrik jacks. I've run the mains leads for the rack kit up one side of the rack tower, and kept audio away and not parallel, as much as possible.

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Subject Posted by Posted on
* Yet another ground loop query... nathanscribe 02/02/12 05:51 PM
. * Re: Yet another ground loop query... ef37a   06/02/12 10:30 PM
. * Re: Yet another ground loop query... nathanscribe   04/02/12 04:26 PM
. * Re: Yet another ground loop query... nathanscribe   04/02/12 10:55 AM
. * Re: Yet another ground loop query... Hugh RobjohnsAdministrator   04/02/12 12:45 PM
. * Re: Yet another ground loop query... nathanscribe   04/02/12 01:00 PM
. * Re: Yet another ground loop query... Martin WalkerModerator   04/02/12 02:38 PM
. * Re: Yet another ground loop query... Martin WalkerModerator   03/02/12 09:48 PM
. * Re: Yet another ground loop query... Hugh RobjohnsAdministrator   04/02/12 10:32 AM
. * Re: Yet another ground loop query... UNMUTE   03/02/12 05:13 PM
. * Re: Yet another ground loop query... nathanscribe   03/02/12 05:23 PM
. * Earth and distribution UNMUTE   03/02/12 05:29 PM
. * Re: Earth and distribution Hugh RobjohnsAdministrator   03/02/12 05:41 PM
. * Re: Earth and distribution nathanscribe   03/02/12 06:13 PM
. * Re: Earth and distribution Hugh RobjohnsAdministrator   04/02/12 10:20 AM
. * Re: Earth and distribution UNMUTE   03/02/12 06:49 PM
. * Re: Earth and distribution Hugh RobjohnsAdministrator   04/02/12 10:24 AM
. * Re: Earth and distribution nathanscribe   03/02/12 06:57 PM
. * Re: Earth and distribution UNMUTE   03/02/12 07:07 PM
. * Re: Earth and distribution Hugh RobjohnsAdministrator   04/02/12 10:26 AM
. * Re: Earth and distribution nathanscribe   03/02/12 07:21 PM
. * Re: Earth and distribution UNMUTE   03/02/12 07:25 PM
. * Re: Earth and distribution Hugh RobjohnsAdministrator   04/02/12 10:28 AM
. * Re: Yet another ground loop query... nathanscribe   03/02/12 01:08 PM
. * Re: Yet another ground loop query... James PerrettModerator   03/02/12 04:06 PM
. * Re: Yet another ground loop query... nathanscribe   03/02/12 05:09 PM
. * Re: Yet another ground loop query... James PerrettModerator   06/02/12 12:15 PM
. * Re: Yet another ground loop query... nathanscribe   06/02/12 02:45 PM
. * Re: Yet another ground loop query... Hugh RobjohnsAdministrator   06/02/12 04:09 PM
. * Re: Yet another ground loop query... nathanscribe   06/02/12 04:29 PM
. * Re: Yet another ground loop query... Hugh RobjohnsAdministrator   03/02/12 10:49 AM

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