| Author |
Message |
    
Weston96
New member
Username: Weston96
Post Number: 1
Registered: 5-2004
| | Posted on Tuesday, June 01, 2004 - 12:43 am: | 
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I have a Cobra 75WXST with a 3ft Firestick Antenna (channel mount on hood) on a 98 Jeep Cherokee. I am using 18 ft of new RG-58A/U coax. I am getting noise from the radiator cooling fan. The radio power is fused off the battery (Both + & -). When I disconnect the antenna at the radio, the noise stops. In testing, I jumped the cooling fan off the battery so I could run it when I wanted, and when it runs, the whine is present either with the engine running or not. I have run a ground from the fan housing to ground which helped a little, but not much. I have also run extra grounds on the hood to the frame etc. Without moving the antenna, does anyone have any suggestions? |
Kingarthur
New member
Username: Kingarthur
Post Number: 9
Registered: 5-2003
| | Posted on Tuesday, June 01, 2004 - 7:29 pm: |
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I have an 87 jeep cherokee with the same problem. I put a noise supressor in line & that seemed to help. Also I think the electric fuel pump has something to do with it. If your antenea is a body mount or non magnetic, try putting a seperate ground on it. I used a 6-8 gauge wire about 4-6 foot long to the frame. That seemed to help alot. |
Weston96
New member
Username: Weston96
Post Number: 2
Registered: 5-2004
| | Posted on Wednesday, June 02, 2004 - 10:55 pm: |
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Thanks Kingarthur,
I will try running a ground to the frame and also a noise supressor. |
Gunship
Junior Member
Username: Gunship
Post Number: 23
Registered: 8-2003
| | Posted on Thursday, June 17, 2004 - 5:51 am: |
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Here's something that worked on my 88 Cherokee. I ran the power straight from the battery with mini-8 coax. Cut four inches of the outer shell and braid back at the radio end, leave about 1-1/2" of braid twisted and strip off 1/2" of inner insulator from the center conductor. Tie the pos. to the center conductor and the neg. to the braid.
At the batterymeasure the distance from pos. to neg. terminals of the battery. Cut the outer shell back 1" past that. Cut the braid back to 1-1/2" and attach to the neg, post. cut off 1/2" of the center conductor insulator and attach the center conductor to the pos. The shield will now carry all noise straight to ground and you'll have a nice, quiet radio. |
