do i need to ground my cb antenna? - JKowners.com : Jeep Wrangler JK Forum
 
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post #1 of 9 Old 10-31-2015, 12:18 PM Thread Starter
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do i need to ground my cb antenna?

I recently made a cb antenna mount out of angle iron and I am trying to find out if I need to ground it. The mount is on the tire carrier mount break light and the antenna is a Wilson trucker 2000. thanks in advance for the help.
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post #2 of 9 Old 10-31-2015, 01:53 PM
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I would say yes on your case since it is mounted on the 3rd brake light housing.

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post #3 of 9 Old 10-31-2015, 06:10 PM Thread Starter
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Thank you Uncle Sam
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post #4 of 9 Old 11-10-2015, 07:02 PM
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Don't do it yet. you have your antenna mount incorrectly assembled.

There should be an insulator that keeps the antenna separated from the mount itself. The mounting bracket DOES need to be grounded, but the antenna needs to be isolated from ground. The antenna works as the positive part of the system, and the vehicle works as the negative part of the antenna system. The radio put out both a positive and negative PHAZE of the signal, and the center lead of the coaxial cable is the positive, and the shield of the coax is the negative/ground.

So, you should have the antenna isolated from the mount with a plastic dielectric washer/spacer piece, and the center lead of the coax should connect to the antenna, while the shield part of the coax connects to the mounting bracket, which should also be connected to the vehicle frame via a ground strap, or directly mounted.
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post #5 of 9 Old 11-17-2015, 08:35 PM
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Check on the Firestick website. They have a page on how to mount it. Look in the tech docs for a page named "Know Your Stud Mount".. Sorry I would link it, but I don't have enough posts yet.
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post #6 of 9 Old 11-18-2015, 12:34 AM
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Quote:
Originally Posted by Necro View Post
Don't do it yet. you have your antenna mount incorrectly assembled.

There should be an insulator that keeps the antenna separated from the mount itself. The mounting bracket DOES need to be grounded, but the antenna needs to be isolated from ground. The antenna works as the positive part of the system, and the vehicle works as the negative part of the antenna system. The radio put out both a positive and negative PHAZE of the signal, and the center lead of the coaxial cable is the positive, and the shield of the coax is the negative/ground.

So, you should have the antenna isolated from the mount with a plastic dielectric washer/spacer piece, and the center lead of the coax should connect to the antenna, while the shield part of the coax connects to the mounting bracket, which should also be connected to the vehicle frame via a ground strap, or directly mounted.
just about to mount my antenna in a week...i learned something today ...i bet you saved me a lot of frustration...thanks!
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post #7 of 9 Old 11-20-2015, 12:24 AM
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Not only saved you some frustration but your radio too

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post #8 of 9 Old 11-20-2015, 08:37 AM
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post #9 of 9 Old 11-20-2015, 09:13 AM
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I've also found it's best to run as short and fat a ground wire as possible. My CB antenna mounts have always been grounded with at least a 12 AWG wire, no more than a foot long if possible -- even if the mount is bolted/screwed to a grounded body panel. More grounding (of the appropriate parts) is never a bad thing.

The better your ground plane is, the better your setup will transmit.

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