update on alternator noise over speakers

[Ti Kan]

Tim Sidders writes:
> I have disconnected the RCA's, and the noise goes away....These are $40.00
> Rockford Fosgate cables which are supposed to be very good. I guess this is
> telling me that the problem lies in the RCA's, maybe if I move the remote
> turn-on so it doesn't run along the RCA's this may solve my problem.....

Sounds like you have a ground loop.  Are all the stereo components
(head unit, amps, etc) in your system grounded at one common point?
There are a few of ways to solve grond loop problems.

1. All components ground in one location, using as short a wire and
   as heavy a gauge as possible.
2. The RCA signal cable ground connection should be connected only on
   one end (do this only if the input of your amplifier has true ground
   on its input, rather than some sort of differential input.  If the
   latter you wouldn't have a ground loop in the first place)
3. Use a ground loop isolator transformer (available at Radio Shack).

-Ti
01 S4 2.7 biturbo quattro
84 5000S 2.1 turbo
80 4000 2.0
96 A4 2.8 quattro (sold but not forgotten)
-- 
    ///  Ti Kan                Vorsprung durch Technik
   ///   AMB Research Laboratories, Sunnyvale, CA. USA
  ///    ti at amb.org
 //////  http://www.ibiblio.org/tkan/
///