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Coldwater Surfer
Samba Member
Joined: June 21, 2010
Posts: 10
Location: Seattle
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 Posted: Sun Sep 26, 2010 3:29 pm Post subject: MP3 Stereo Jack Feedback with Cigarette Charger? |
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When I have my iphone connected to the stereo via the auxiliary jack, it plays fine. If I connect it my cigarette lighter charger while it's playing, I get a terrible feedback. I have tried different chargers with no change. The sound frequency changes with engine rpm's which leads me to believe that there is a ground somewhere in the system. I have tweaked with the sound setting on the phone and stereo to make it barely audible, but I would like to eliminate it completely. Do others have this problem, or should I start chasing electrical gremlins?  |
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82WestyMan
Samba Member
Joined: December 28, 2006
Posts: 1098
Location: Western OR
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| Posted: Sun Sep 26, 2010 3:48 pm Post subject: |
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Might be a good idea to include what year and model Vanagon you own,
as well as what make and model stereo you have including what and how your speakers are wired...
it's all in the details...
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"The floggings will continue until morale improves"
"I never did give anybody hell. I just told the truth and they thought it was hell" - Harry S. Truman
82 Westfalia - w/ a Raby 'Camper Special' engine |
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Coldwater Surfer
Samba Member
Joined: June 21, 2010
Posts: 10
Location: Seattle
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| Posted: Sun Sep 26, 2010 9:53 pm Post subject: |
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| So after hours of searching I'm pretty sure I found out the cause of this noise. It's not a Vanagon related problem, but an interesting read on car wiring. Wikipedia says this problem is known as a "ground loop" http://en.wikipedia.org/wiki/Ground_loop_%28electricity%29 If I understand this correctly, I have to have the stereo and cigarette lighter attached to a common ground and the interference should go away. I hope this fixes it. |
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wasserbox
Samba Member
Joined: April 08, 2008
Posts: 533
Location: Durango, CO
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| Posted: Mon Sep 27, 2010 6:54 am Post subject: |
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| Coldwater Surfer wrote: |
| I have to have the stereo and cigarette lighter attached to a common ground and the interference should go away. |
Just a word of caution... I killed two Ipod's running them off of my cigarette lighter. I personally wouldn't run any delicate electronics off the van's charging system without throwing some kind of power conditioner / protector inbetween.
Only took me twice to learn...  |
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hiram6
Samba Member
Joined: September 29, 2006
Posts: 1880
Location: Beautiful South
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| Posted: Mon Sep 27, 2010 7:05 am Post subject: |
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Check with a local car stereo shop or a Radio Shack for a generic noise filter for your cigarette lighter. Will eliminate the hum or whir you are hearing, most likely. Cheap and easy install.
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1985 Westy, 1.9L automatic (Daisy)
1996 Mazda Miata
1998 Jeep Grand Cherokee 5.9 Limited
You can't lie around on the beach and drink rum all day.................unless you start first thing in the morning. |
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