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Re: [RFI] Latest RFI-proof SUVs

To: RFI Reflector <rfi@contesting.com>
Subject: Re: [RFI] Latest RFI-proof SUVs
From: dalej <dj2001x@comcast.net>
Date: Thu, 11 Jun 2009 03:57:49 -0500
List-post: <rfi@contesting.com">mailto:rfi@contesting.com>
I've been mobiling five years in a 2004 Toyota Sienna, purchased in  
Sept 03.  I have not had any issues with RFI getting into the vehicle  
computer etc.  I did have a hash which was S-9 in the 706MKIIG but  
after I grounded the radio to the body that was cut down to about  
s-3.  I don't know if the hash was fuel pump or computer, it doesn't  
sound like ignition noise at all, plugs firing, just a steady hiss  
that blankets the 75 meter band. The blanker takes out the remaining  
noise to S-1 or 2.

As for the Sienna the maintenance has been to change oil.  Oh, I did  
put some new tires on a few months ago.


On 11, Jun 2009, at 0:32, Jim Brown wrote:

> On Wed, 10 Jun 2009 16:23:42 -0400, Mel Crichton wrote:
>> Any HF RFI experiences or problems  with Toyota 4 Runner or
> Highlander? Honda Pilot? Subaru 4 cylinder Forester or Outback?
> My experience with a Toyota Sequoia (BIG SUV) was very bad from an
> RFI perspective. Mounted a hamstick on the luggage rack, with coax
> bonded to the body at that point. Fired up the rig with 100W on
> 17M and the fan that blows air in the passenger compartment
> speeded up. No big deal. 100 watts on 20M crashed the car's
> computer, putting me in limp home mode, leaving me stranded in the
> Nevada desert. Luckily I had tools, and got running by
> disconnecting the battery to reboot the computer. I'm told that I
> was lucky.
> I don't spend enough time on trips to justify troubleshooting it,
> and other things have been demanding my time (like antennas at a
> new QTH, lots of writing projects, etc.). Prior to putting the rig
> in the car, spent some time with an ohmeter studying chassis
> bonding. The main thing I learned is that there isn't any -- way
> too much paint between sections of the body. That's probably the
> heart of the problem.
> Design philosophy tends to run by brand, so my advice is that if
> you care about HF mobile, stay away from Toyota. Fixing that bad
> bonding would be a HUGE project. I think I heard that Honda was
> good for RFI, but that was 4 years ago.
> BTW -- I'm otherwise happy with the vehicle. 85,000 miles in 3 1/2
> years, RFI is the only serious issue. Haven't even done a brake
> job yet.
> 73,
> Jim Brown K9YC
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