[TenTec] Ford vehicle RF noise.

[Bwana Bob]

I forgot: Also put coaxial bypass caps on the heater motor leads. I 
found the heater blower to be a significant source on noise in my 
Explorer and most cars have the blower running all the time.

If you want to operate HF in the rain, you will also need to do 
something about the windshield wiper motor.


					73,

					Bob WB2VUF

Bill Harris wrote:
> Besides tailpipe grounding,  we grounded the engine hood on both sides. We even went as far as a shielded ignition.  Also, coaxial by-pass capacitors on the 12 volt generator. (this is a few years back)  The alternator can be troublesome as well.  Installed grounding devices that went in the axel hub caps and  injected a powder that prevented static build up in the tires.  Ohoo yeah,,,ground straps between the chassis and frame (each side).  All this to get the noise floor down for operation on the 40mHz FM band.  I would expect the vehicles of today are noiser with all the computers on board.
> Gud Luck.
> 
> Carry-on
> BillHarris w7kxb
>   ----- Original Message ----- 
>   From: Duane Calvin<mailto:ac5aa1 at gmail.com> 
>   To: wb2vuf at arrl.net<mailto:wb2vuf at arrl.net> ; 'Discussion of Ten-Tec Equipment'<mailto:tentec at contesting.com> 
>   Sent: Sunday, September 30, 2007 6:55 PM
>   Subject: Re: [TenTec] For Sale: Ten Tec Argonaut V
> 
> 
>   Ford has stopped doing this as a TSP?  It worked great on my 2002 F-150 (for
>   the fuel pump  noise, anyway).  Took the overall noise from S9+20 down to
>   S9.  Grounding the tailpipe took the noise down to S6.  A few things I've
>   tried after that haven't helped much.  Mostly ignition noise left now.
> 
>   Duane
> 
> 
>   Duane Calvin, AC5AA
>   Austin, Texas
>   www.ac5aa.com<http://www.ac5aa.com/>  
>    
>   -----Original Message-----
>   From: tentec-bounces at contesting.com<mailto:tentec-bounces at contesting.com> [mailto:tentec-bounces at contesting.com]
>   On Behalf Of Bwana Bob
>   Sent: Sunday, September 30, 2007 8:35 PM
>   To: Discussion of Ten-Tec Equipment
>   Subject: Re: [TenTec] For Sale: Ten Tec Argonaut V
> 
>   The Ford fuel pump RFI filter produces mixed results and requires 
>   dropping the tank because the filter is installed right at the pump. A 
>   better way (IMHO) is to cut into the pump wiring at the nearest 
>   connector (about 2 feet from the tank) and installing coaxial type 
>   feedthrough capacitors. You can find more info at 
>   http//www.4x4central.com in the ham radio forum.
> 
>   73,
> 
>   Bob WB2VUF
> 
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