TIP: Click on subject to list as thread! ANSI
echo: audio
to: BONNIE GOODWIN
from: T OWEN
date: 1996-05-16 19:30:00
subject: Re: 60Hz HUM!!! AHHHH!!

-=> Quoting Bonnie Goodwin to Bob Roe <=-
 BG> Audio systems must be grounded at one location and one only, which is
 BG> why I hate grounded electrical. The thing is, there is a ground on the
 BG> audio too which causes instant ground loop when using grounded
 BG> electrical outlets. Also, the ground reference should be at the lowest
 BG> signal (such as mike mixers and turntables, et al). Everything else
 BG> should be "star" grounded to that location and then everything taken
 BG> to the electrical ground, which is only for safety reasons, otherwise,
 BG> grounding is not really necessary. Another thing I try to insure is
 BG> that all of the electrical is from the same phase so that if there is a
 BG> problem, you don't end up with a 220 volt potential across your
 BG> equipment.
 BG> Also, when using "star" grounding.. make sure that your ground return
 BG> has the ampacity to do effective grounding.
 
Grounding is one of the least understood aspects of pro audio. I am
constantly trying to explain to folks the dangers involved in lifting
system grounds. You should repost this message weekly! Good to see
that you are back; it was getting boring in here. Take care.
... If it's professional.............it ain't Peavey!
--- Blue Wave/DOS v2.30
---------------
* Origin: Computer Castle / 20 Lines / Newton, NH / 603-382-0338 (1:324/127)

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