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[RFI] Vitara Computer module noise

To: rfi@contesting.com
Subject: [RFI] Vitara Computer module noise
From: Michael Coslo <mjc5@psu.edu>
Date: Tue, 09 Oct 2007 09:39:38 -0400
List-post: <mailto:rfi@contesting.com>
I've recently installed an HF mobile setup in my 04 Suzuki Vitara.  
I've traced a RFI problem to my ECM module. It gives me an S7 to S9  
noise. Bad news

Here's what I've done so far:

Bonded all doors, hood, radiator, and exhaust system to the frame and  

Bonded ECM case to ground.

Added ferrites to Power cables on both ends

Ferrites on radiator fan

Ferrites on ECM wires.

Without the antenna, the ECM noise is not there, so I assume that it  
is radiated, not coming through the power lines.

I have all tho other noise sources pretty well diminished. I did not  
install a ferrite on the gas pump - it is pretty quiet except for an  
occasional thwit - and I'd have to drop the gas tank to get at the  

Any ideas? I'm taking it out for the PAQSO party this weekend, and  
although I will be working the party stopped, it would be nice to be  
able to use it between stops also.

   - 73 de Mike KB3EIA -

-73 de Mike KB3EIA -

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