On 02/09/2015 11:38 PM, Roger wrote:
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