Date: Thu, 15 Sep 2005 18:29:23 -0500
Reply-To: Max Wellhouse <maxjoyce@IPA.NET>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Max Wellhouse <maxjoyce@IPA.NET>
Subject: Re: Radio Noise Problem on AM
In-Reply-To: <000001c5b80b$70982f60$6400a8c0@masterpc>
Content-Type: text/plain; charset="us-ascii"; format=flowed
I'll look into all that for sure. The cell phone bombardment theory
might hold water if our other two cars had the same problem. I think
this is Vanagon(ie my Vanagon)-specific issue. Where would the Radio
shack filter go? In line on the power wire from the battery to the
radio? I do have 2 big amps driving a stereo and maybe they re
causing some trouble. Who knows!
BTW, Gas is 2.69 a gallon in "beautiful" downtown Huxley Iowa.
thanks for the help.
DM&FS
At 09:32 PM 9/12/2005, Dennis Haynes wrote:
>Most likely the radio is picking up the noise from the alternator. Make
>sure the factory suppressor is in place and consider getting a filter
>from radio shack. AM is susceptible to noise do to the modulation
>characteristics. FM is inherently much more noise resistant.
>
>Dennis
>
>-----Original Message-----
>From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf
>Of Max Wellhouse
>Sent: Saturday, September 10, 2005 8:19 PM
>To: vanagon@GERRY.VANAGON.COM
>Subject: Radio Noise Problem on AM
>
>I have had a consistently inconsistent problem whe3n listening to my
>AM tuner in my 90 GL. The head unit is a Sony XR-C6100 but
>I'm pretty sure it's not the Sony's fault. BTW, it has two Rockford
>Fosgate amps driving the stereo speakers, so the Sony chip amp
>doesn't get heard very often. The radio makes the same noise whether
>the R/F's are thumping or not.
>
>Symptoms are as follows: I will turn on the unit on and be listening
>to either a local or far away station and after a few minutes, there
>is a very annoying sound that resembles someone taking a signal
>generator and running from about 100hertz to about 2k hertz. it
>oscillates some and is intermittent. The reason I don't initally
>bame the Sony is that when I take my hand out of the driver's side
>window and touch/ wiggle/massage the antenna shaft, it changes pitch
>or briefly goes away. Other than bad grounding, what could be
>causing this strange nosie. If it were bad ground, wouldn't it also
>affect FM performance too? The FM side is fine. FWIW, the antenna
>is the model that has the really skinny black solid shaft and it
>threads into othe unit attached to the body. Any help would be
>greatly appreciated.
>
>DM&FS
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