[Top] [All Lists]

[RFI] Mobile EMI

To: rfi@contesting.com
Subject: [RFI] Mobile EMI
From: Mike Roden - W5JR <w5jr@bellsouth.net>
Date: Wed, 07 Dec 2005 22:41:37 -0500
List-post: <mailto:rfi@contesting.com>
The fuel pump noise in my '02 Yukon is horrible, especially 
20m-10m.  The injector noise is also very ugly, particularly when 
accelerating.  I am unable to do any SWL/AM listening due to the 
wider bandwidth because of the injector and fuel pump noise.  The GM 
dealer claims there are is not a fuel pump bulletin for the '02 like 
there was for my '93 Suburban.  I have thrown beads and ground straps 
at the thing and have probably added 20 lbs to the vehicle weight 
with very little improvement.  Thank goodness the noise blanker in 
the 706mkIIG works for me to knock down the injector noise to usable 
levels - except that on 40m, the broadcast is so strong in the 
evenings that desired signals have NB distortion on them.  Without 
the NB, the injector noise is well over S9 at idle.

The latest contributor is the display of the XM Roady 2 receiver.  It 
raises the noise level by several S units across the bands.  Any 
recommendations for that one?  I have not tried any ferrites on the 
power leads yet - I just turn it off when on HF.


Message: 10
Date: Wed, 07 Dec 2005 09:07:34 -0600
From: "A. Sewell" <alan.n5na@gmail.com>
Subject: Re: [RFI] Mobile EMI
To: rfi@contesting.com
Message-ID: <4396FAB6.1060105@gmail.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed


I have a 2000 Silverado.  I installed some snapon ferrite beads as close
to the fuel pump as I could.  It helped quite a but there is still some
noise there.


Alan  N5NA

Hardy Landskov wrote:
 > Hi All,
 > Sorry, I just joined the group and have not had the time to look at the
 > archives. There was an article in QEX, year 2000 or so that detailed what a
 > person did to get rid of the engine noise, et al so he could operate
 > mobile.  The article  mentioned  an L/C filter (I think) that was called a
 > "filter con".  I have surfed the web and have not found anything like that.
 > Does anyone know what that is and how to get some?
 > My problems are identical in my 2001 Silverado pickup. The fuel pump RFI is
 > just as bad as his.
 > Thanks es 73
 > Hardy N7RT

Mike - w5jr@arrl.net - Alpharetta, GA 

RFI mailing list

<Prev in Thread] Current Thread [Next in Thread>