AC Hum problem

[Ron Bello]

It is most likely a ground loop.

Getting rid of can be simple or a real pain.

Easiest solution is to plug everything in exactly the way it was 
before (no hum).
This includes how the components are plugged into the AC outlets.
Sometimes flipping the plug 180 degrees (if possible) will do it.


At 09:09 PM 4/5/2008, A. Joseph Ross wrote:
>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                            http://www.attorneyross.com