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Author Topic: Ford F-150 Noise Problems  (Read 477 times)
K7ZT
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Posts: 12




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« on: May 28, 2002, 10:18:44 AM »

I recently installed an IC-706 MKIIG in my Ford F-150 along with a DK3 Screwdriver ANT. The noise level makes reception prohibitive on all but the strongest signals.  I'm looking for any "easy" things that I can do to mitigate this problem.

Thanks,
- Joe, K7ZT
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K7ZT
Member

Posts: 12




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« Reply #1 on: May 28, 2002, 02:44:47 PM »

I failed to mention that the F-150 is a 2001 model.

- Joe
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N3MG
Member

Posts: 27




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« Reply #2 on: May 29, 2002, 10:49:11 PM »

Hey Joe-

Sorry to hear about your noise problem. I do not own an F-150, however, this vehicle has a well documented history of the fuel pump causing EMI/RFI.

I understand you want an "easy" fix, but unfortunately, I am not sure that one exists. Here is a small start.

If you do a Google search with "Ford F-150 RFI" you'll get some decent websites to check out such as

http://www.arrl.org/tis/info/fuel.html

http://www.eham.net/forums/MobileHam/778 (an older thread from this website)

http://www.mindspring.com/~nx7u/mobile/noise.htm (Scott's website is excellent-check it out. His station is in an F-150.)

http://www.k2bj.com/Pages/Noise/Intro.htm
(Brian's website is also chocked full of information)

Hope that helps. I would have to say that part of the fun and frustration of mobile HF is not just the operating, but working through and solving some interesting installation problems that you do not encounter with your home setup.

Good Luck and 73-

Mark
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K7ZT
Member

Posts: 12




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« Reply #3 on: May 30, 2002, 07:32:41 AM »

Mark:
Many thanks for the suggested web sites to read.  I have accomplished a few things that have helped on 80 -30 meters, however, the problem still exist on the higher frequencies.  I bonded the exhaust to the frame, bonded the hood to the firewall, and bonded the pickup bed to the cab.  That did eliminate the majority  of the noise on the lower freqs.  Oh well, I was afraid the the fix would be a challange, I will read on.

Warm Regards,
- Joe K7ZT
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KA3VVV
Member

Posts: 0




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« Reply #4 on: May 30, 2002, 06:26:39 PM »

A  ham friend  W3bt have the sam problem. He use a Clear Speech speaker. Look here http://www.amateurcommunications.com/  It work it cut all that noise out. If you get  the dealer to fix the noise problem it will last only for about 6000 miles. It something to do with the gas. but the clear speech will work. give w3bt a email.
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KA3VVV
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« Reply #5 on: May 30, 2002, 06:28:55 PM »

All so check out the reviews http://www.eham.net/reviews/detail/1041
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K0BG
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Posts: 9879


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« Reply #6 on: May 30, 2002, 06:58:19 PM »

As has been pointed out, the F150, and a lot of other Ford cars and trucks, have a lot of Fuel Pump RFI. The "simple" fix is to purchase three or four snap-on ferrite beads. These can be purchased from Radio Shack, Amidon, or Palomar Industries. Mount them as close to the fuel pump (typically located on the right rear inner frame rail) as possible. Depending upon model and engine, there may be a in-fueltank mounted pump as well. The feed to this pump must also be suppressed.

These snap-on units can also be used on the fuel injection harness just in front of the firewall. The rise time of the fuel pulses are rather quick, so don't use more than two units or you may have a high RPM problem show up on some models.

There is a TSP (Technical Service Bulletin) on this problem, and your Ford dealer should be able to download and print it out for you.

As for the Clear Speach speaker suggestion...the 706 has a very good built-in noise filter, as well as a good noise blanker. They work, but they also make copying weak signals difficult.

Lastly, both the radio, and head if mounted separately, should be grounded well.

Good Luck

Alan Applegate, KØBG
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