On 13 Jan 2004 16:07:15 -0800, wrote:

(Randy Chavis) wrote in message ...

Anybody have any ideas to lower noise in my FT-857 mounted in my F-150
pickup? S7-S9 noise (engine running, with NB ON) on 17M (Only band I've
tried on HF yet). Antenna is an Outbacker mounted on a mount I welded up
for my receiver hitch and puts the base of the antenna at about roof level.
Quiet as a mouse when truck is shut off. Go figure...hard to be "mobile"
with the engine off

--
Scott N0EDV
Gotta Fly or Gonna Die
http://corbenflyer.tripod.com
Building RV-4

you will find the problem in the fuel pump..Ford had a big porblem with it not
being grounded.They have a fix for it but you will have to talk to a Ford tech
to find it and buy it from them....

Randy




ARS: WB4UNA
Randy Chavis
247 Goff Court
West Columbia
S.C. 29172 Get ready to remove the tank,pump is inside..run the pump power through a pair of coax caps (about .1 to .25 OK ) mount them directly at the pump terminals on the tank..that will get about 90% of the noise..ground the tail pipe at the back bumper ,good braid ground. None of the Ford dealers that I contacted wanted to talk about the problem,never heard of it .. Good luck W4PQW

Randy,

Ford has had a service bulletin out for several models about the fuel
pump noise. http://www.arrl.org/tis/info/pdf/W1MG.pdf have a look at
the url, it tells about your fuel pump noise even gives diagrams and
suggested time to install the filter for a qualfied mechanic.
I found out about it when my 1996 Ford Ranger was still under
original factory warranty. The ford dealer added a fuel pump
electrical filter to the fuel pump in the fuel tank. Can't say it did
a whole lot of good though, but is better than it was before they
added the filter.

Who makes the coaxial caps you used ?


Gary K8IZ
Washington State Resident
Registered Linux User # 312991