[LAU] ground loop hell

[Bob van der Poel]

On Sun, Feb 8, 2015 at 3:57 PM, David Christensen <dpchrist at holgerdanske.com
> wrote:

> On 02/08/2015 09:06 AM, Len Ovens wrote:
>
>> Beware old building with additions  :P  It appears we have power coming
>> from two power entrances with two different earth grounds to the panels.
>> I had found two power cords with the ground pin pulled which I
>> replaced... big ground loop noise. I tried (as read from a number of
>> sources) making unballanced cables with a small resitor in the ground
>> path but this made things worse not better. I will be running a power
>> cord from the stage back to the mixer next. All of our signal in paths
>> are already isolated. It is only the two monitor mixes to powered
>> monitors that are unballanced and causing problems. The outputs from the
>>
>
​Just wondering on all this ... where the grounding is "suspicious" does
the use of a ext. chord with a built in GFI switch add any safety? Probably
doesn't solve grounding loop problems.
-- 
**** Listen to my FREE CD at http://www.mellowood.ca/music/cedars ****
Bob van der Poel ** Wynndel, British Columbia, CANADA **
EMAIL: bob at mellowood.ca
WWW:   http://www.mellowood.ca
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