I installed a C.B. in my 2001 F-150 and when the truck is running I hear a steady whine in the radio.When it is not running it works perfectly with the key in the acc. or start position.If I disconect the antenna lead when the truck is running the whine stops.Can anyone please give me some input as to how I can get rid of the whine.Thank you.

 

[updated:LAST EDITED ON 12-Feb-02 AT 08:21 PM (EST)]You need a radio noise choke.

Where have you tapped the power from?

Directly from the battery is best,using a shielded cable.
Like cable TV Coax or Radio Antenna Coax.
Make sure you use minimum exposure of wire for attaching.


It is a whine ,not a pop ,right?

Pop is from ignition.
Whine is from altewrnator.

Go to Radio Shack and tell them you have Alternator whine coming over your radio.

They should sell you a supression choke.

Make sure your radio is matched properly and the antennas grounded Extremely Well.

Check Radio Shacks web site or I'll find it and post the link here.

It should be the second item on this page.

http://www.radioshack.ca/en/search/Search.asp?ct=rs%5Fsrc&so=rank%5Bd%5D&qu=%28%40met a%5Fcopy%5Ftext+%28C.B.%29+OR+%40meta%5Fname+%28C. B.%29%29&mh=10&sh=20&ae=1&qu%5Finit=C%2EB%2E


*Note: This is only One design.
There are many others available.



Dennis



Please Don't Ask Me Any Tough Questions As:
"I'm Saving My Memory For When I Develop Alzheimer's"


78 F-150 429CJ,Silver
w/Explorer Pkge.
641/2-Mustang 260,Pre-World's Fair Car.
64-Fairlane500 S/C waiting for a 390-4spd.
68-Mustang 289-Sunlit Gold 80,892Mi
78-Buick LeSabre 403 4V
84 Volvo DL Wagon

 

[updated:LAST EDITED ON 14-Feb-02 AT 01:08 PM (EST)]Ford's are notorious for having noise come from the fuel pump also. They have had so many people ask about it, they made a filter themselves that you splice into the power and ground of the fuel pump. They don't tell anyone about it, because about the only time you hear the noise is from CB's and ham radios. They didn't want it to turn into a recall event from people saying they hear noises.

The part number is: F1PZ18B1925A

Most of the Ford parts dealers I have walked into don't have a clue of what I am talking about. Take the number and get you one. If you want someone who knows about it, call Rusty at Spartan Lincoln Mercury. 770.968.3412. He is here in Georgia, and knows all about the filter.

I had the same problem in my Explorer and in my dad's Ranger. Put the filter on the pump, and the noise went away.

Our fuel pump was on the top of the tank, so we had to run the tanks dry, and drop them to get to the pump. I don't know where it is on an F150.

Hope this helps...


Oh yeah - never key the mike with your antenna off. It can backfeed into the radio and burn out the finals. Also, try to keep your coax in 3' lengths. Helps on your SWR. I recommend having a piece from the radio to the antenna either 15', 18', or 21' long. I run a 6' piece between my radio and linear, and an 18' section between the linear and antenna.

 

Thanks for the tips.CobraXP your information was right on the money.The only problem was the part number.It acctully is F1PZ-18B925-A.Ford calls it a filter.It took out 95% of the whine.I hooked it up just before the fuel pump to the two 14ga. wires (pink/black+,black-). Thanks again.

 

Glad it helped! Sorry about the hyphens - the guys in parts should have known what I meant. I messed with mine for about 2 years before I found that filter. I won't even embarrass myself by telling you all the different things I tried before the blasted thing...

 

Usually it’s the alternator combined with grounding issues. Is it a magnet mount or a hard mount? If it’s a hard mount, make sure that the shield is well grounded at the antenna end. If it’s mounted to the bed, make sure the bed is well grounded to the frame. Also use 10-12 ga. wire straight to the battery, both + & -. Sometimes twisting the wires (instead of coax) can help.