Removing alternator whine

[amalventano1@comcast.net (Allyn)]

    If you want to isolate noise to the whole car (and therefore the stereo as well), you would need
a pretty big capacitor (about a farad). If you install it just on the amp, you will have to be sure
the head unit is on the same circuit (i.e. after the cap). This means relaying the switched ignition
power (since the ignition power going to the amp would be unfiltered).
    A remote cause of your alternator whine may be ground loops. If the amps/head are low grade they
will pick up the ripple voltage in the low voltage inputs and amplify them.
Al

----- Original Message -----
From: "Brad Sterling" <bgsterling@earthlink.net>
To: "'Scirocco List'" <scirocco-L@scirocco.org>
Sent: Sunday, April 21, 2002 11:03 AM
Subject: RE: Removing alternator whine


> <snip Nick and others>
> Another way to get rid of the whine is to get a filter...
> <end snip>
>
> So if a filter is the answer, I guess my options are one of those ready-made
> jobbies from a stereo shop or a capacitor from Radio Shack or the like.  If
> I were to go the Ron route and buy a capacitor, what should it be rated at?
> Would it be best to put it inline between the alternator and battery or the
> battery and amps?  TIA.
>
> - Brad
> '86.5 Volkswagen Scirocco 16v
> '76 International Scout II
>
>
>
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