AC Hum problem

Dave Doherty
Sun Apr 6 00:19:50 EDT 2008

Check the connection at the stereo. It sounds like the shield on the stereo 
end isn't making good contact. Try twisting the plugs to see if that helps.

If not, you may have a ground loop. Since it is a new effect, there may be a 
power wiring issue.


----- Original Message ----- 
From: "A. Joseph Ross" <>
To: "Boston Radio Group" <>
Sent: Sunday, April 06, 2008 12:09 AM
Subject: AC Hum problem

> Maybe some techies out there can help me with this.
> I got a new car radio awhile back, which has a CD player, rather than
> a tape player.  So I decided to record some of my tapes into my
> computer and put them onto CDs.  I got a long patch cord that runs
> from my stereo in the livingroom into my computer in the study, and
> it worked fine last time I used it.
> This time, as soon as I connected the patch cord, there was a loud AC
> hum from the computer.  I haven't been able to get rid of it.  It's
> there as long as the stereo is connected to the computer sound card.
> Even if the stereo is turned off.
> Anyone have any ideas what's going on and what I can do about it?
> -- 
> A. Joseph Ross, J.D.                           617.367.0468
> 92 State Street, Suite 700                   Fax 617.507.7856
> Boston, MA 02109-2004          

More information about the Boston-Radio-Interest mailing list