Re: Alternator whine from On-Star.... - Saab 9-5 Bulletin Board - Saabnet.com
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Re: Alternator whine from On-Star....
Posted by 2Slow (more from 2Slow) on Tue, 12 Jun 2001 08:41:11
In Reply to: Alternator whine from On-Star...., Aziz Khan, Tue, 12 Jun 2001 08:18:59
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My car had this whine. It was not extremely loud and I delt with it. After I installed the traid and a handsfree phone the wheine was much worse. I greatly reduced its magnitude by placing a low ESR capacitor with a relitively high capacitence accross the positive and negative terminals of the alternater.
The problem is usually caused by ground loops. (Different components grounding at different potentials cause current to flow in ways that were not accounted for and you hear a whine.) The filter does not fix the ground loop but rather attenuates the AC component of your DC power. The AC component is what you are hearing.
You might want to contact Jim Uhl at UHL electronics to see what he thinks.
http://www.uhltronics.com/
-Joe
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