Emu XL-7 & MP-7 User's Group

Power quality, which a UPS can solve, is not the issue here.  Grounding is.
If the ground is not zero volts, that is elevated or has leakage, your
equipment will have 50/60 cycles all over the place.  Even cases of the
equipment will no longer be a shield to hum but an antenna to it.

Take some measurements against a good known ground (maybe waterpipes) with
an AC voltmeter and then possible hire an electrician to reground your
wiring system.....

Bob
Corona/Riverside, CA


----- Original Message -----
From: "gutman75" <bgutman@...>
To: <xl7@yahoogroups.com>
Sent: Monday, May 09, 2005 12:59 AM
Subject: [xl7] Re: buzz in the outputs


> --- In xl7@yahoogroups.com, "infradead" <infradead@y...> wrote:
> > how old is the building you're in?
>
> Funny you should mention that: the studio is in the old part of house,
> which is over 200 years old. At any rate, the power is notoriously bad
> in our area (recently one of my hard disks died - apparently, because
> of a voltage spike, so I'm going to get a UPS anyway). Could low-
> quality power really be causing hum? If so, a UPS is supposed to help,
> right?
>
> Thanks a lot to all who replied!
> Have a nice day,
> Boris.
>
>
>
>
>
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
>
>