[LAU] ground loop hell

[David Christensen]

On 02/09/2015 11:38 PM, Roger wrote:
> These articles may be of interest.
> http://www.rane.com/note151.html
> http://www.rane.com/note110.html

Thanks.


> I have worked at the same venue for many years and have noticed more
> frequent problems recently with hum and buzz
> with some bands' equipment while most are perfectly fine. I suspect
> changes in the grounding such as corroded
> ground rod connectors or dryness in the soil they are in. The boss is
> investigating.

There are electrical contractors that specialize in testing/ 
commissioning electrical systems.  You might want to find one.


> The previously
> mentioned 750 foot run may be a problem though with probable significant
> voltage drop.

I researched that in the past, and seem to recall that good quality 
balanced equipment (e.g. with good driver chips) and good quality XLR 
cables can send a signal ~900 feet before the high end starts to roll off.


David