Date: Mon, 20 Jun 2005 09:56:33 -0700
Reply-To: Jack <john.cook58@VERIZON.NET>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Jack <john.cook58@VERIZON.NET>
Subject: Re: Weird radio problem
In-Reply-To: <42B6D15D.5000109@gmail.com>
Content-type: text/plain; charset=US-ASCII
I'd suggest first checking the actual 12V voltage drop to the radio
with & without the charger load. There may be an unusually high
resistance connection in either the positive or negative wiring or at
the common fuse connection (#3, 15A) //Jack
On 20 Jun 2005 at 7:23, Michael Elliott wrote:
> Cell phone chargers usually use little switch mode power supplies to
> convert the car's 12VDC to whatever the phone wants. These SM supplies
> can generate a lot of radio frequency interference. In the case of FM,
> a loud signal causes the internal circuitry to reduce volume level, and
> it might be blanketing the signal you want to hear.
>
> Your radio is either receiving this interference through the antenna, or
> through its 12V power supply wire.
>
> If the former, there is little you can do except try to find a quieter
> charger. If the latter, then your car audio shops might have
> interference filters you can install on the 12V supply wire to the
> radio, and to the cigarette lighter socket. Come to think of it, if wire
> going from the charger to the cell phone is acting as an antenna for the
> noise, the boys at your car audio shop might have some kind of clamp-on
> filter you can wrap around the charger cable at the plug end to block
> from going down the cable and radiating all over the place. I'd go talk
> to those boys.
>
> --
>
> Mike "Rocket J Squirrel" Elliott
> 71 Type 2: the Wonderbus
> 84 Westfalia: Mellow Yellow ("The Electrical Banana")
> Carlsbad, CA
> KG6RCR
>
>
>
> On 6/20/2005 6:53 AM Brian Wasson wrote:
>
> >OK, here's a problem I can't figure out in my 1988 Westy: When plugging something like a cell phone charger into the dashboard 12v outlet (cigarette lighter), the radio sound cuts out (or diminishes so much that you can't hear it). The stereo itself continues to operate fine, and all functions (LCD, etc.) work.
> >
> >I assume the cig. lighter socket is bad and needs to be replaced, and I will do so (is it necessary to get a direct replacement, or will an aftermarket outlet from Radio Shack or Wal-Mart work). However, I can't figure out why the stereo's sound would be affected, but nothing else?
> >
> >The stereo, lighter socket, lights, etc. (everything on that circuit) are wired to the aux battery.
> >
> >Brian W.
> >
> >
> >
>
>
> --
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