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post #1 of 13 Old 07-15-2014, 11:24 AM Thread Starter
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help needed, cb radio kit not working

I bought this kit...

http://www.rightchannelradios.com/jk-jeep-cb-kit.html

and when I installed it, I was getting sky high swr meter readings. I tried installing extra grounds, nothing really worked. Now the swr meter won't move at all. It won't respond to me pressing the mic button.

I've checked the inline fuse, I tried a new swr meter, I tried an extra ground from the antenna to the frame. I cant seem to get this thing working. It still appears to receive radio chatter, weather channels, etc, but What can I do to get the swr meter reading again???
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post #2 of 13 Old 07-15-2014, 12:55 PM
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My wife to install a cb radio..... might need some help also with installation knowledge.. i will sit back and read..

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post #3 of 13 Old 07-15-2014, 05:37 PM Thread Starter
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Anyone have any clue what might cause a swr meter not to read anything???
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post #4 of 13 Old 07-16-2014, 04:46 AM
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Originally Posted by 14jkaltitude View Post
Anyone have any clue what might cause a swr meter not to read anything???
Outside chance the SWR meter is bad, but blown final amps in the radio is a good guess. Extended periods of transmitting with ultra high SWR will do it and any manual you pick up will state that. You could verify by connecting your radio to someone else's antenna with known good SWR. Should be an easy thing to do with that radio. If it still has no output, then it's probably toast.

How high was the SWR? Some radios have a protection circuit that will decrease power if SWR is too high. This is to protect the finals. So it could be that your SWR is so high that your radio is protecting itself by shutting down the transmit power. Try the following and see what you find:

If you have a multimeter, disconnect your coax from both the radio and antenna and check to be sure it's not shorted between the center conductor and the braid. You don't want continuity from the center pin to the outer conductor of the connector.

Also, depending on which antenna and mount you have, it could be that the center conductor is shorting to the ground (body/frame) side of the mount. (This is actually more likely than a shorted coax.) After you verify the coax is not shorted, re-connect it to the antenna and check it again. If you now have continuity where you didn't before, be sure your antenna is electrically isolated from any metal-to-metal contact at the mount.

BTW where are you?

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post #5 of 13 Old 07-16-2014, 07:32 PM Thread Starter
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Thanks for the info, I'm located in western pa. I spoke with the company today, and they are going to send me a new radio. I tested everything, and the only real thing it could be is a bad radio unit. I will post an update once I get the new unit.
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post #6 of 13 Old 07-17-2014, 12:29 AM
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Thanks for the info, I'm located in western pa. I spoke with the company today, and they are going to send me a new radio. I tested everything, and the only real thing it could be is a bad radio unit. I will post an update once I get the new unit.
Sounds like you got lucky. When the new one comes in, don't key up for extended periods (more than a few seconds) until you get that SWR under control. Think about SWR as reflected power. The antenna is rejecting the transmit power because it isn't resonant and all that power is going right back into the radio -- which is bad.

Lots of resources out there to help you set SWR, but in general, check it on 1, 19, and 40 and adjust according to what you find. Ideally it should be low on 19 and slightly higher at each end of the band. If it's high on 40 and lower on 19, lower still on 1, then your antenna is too short and needs lengthened. If it's opposite, it needs shortened. Go slow and don't do anything drastic. This should get it where you want it with a little patience.

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post #7 of 13 Old 07-17-2014, 12:55 AM
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while you're waiting for the replacement radio, check your cable and antenna installation. Sounds like you got a short.

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post #8 of 13 Old 07-17-2014, 08:06 AM Thread Starter
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while you're waiting for the replacement radio, check your cable and antenna installation. Sounds like you got a short.
I tried swapping coax cables and jumper cables, and neither one made a difference, so I don't believe the short is in those. I added an extra ground to the antenna, and that did not seem to help either.
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post #9 of 13 Old 07-23-2014, 08:05 AM Thread Starter
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Well I got the new radio, installed it, and right away was able to tune it. Not sure what was wrong with the old unit, but the new unit works great now.
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post #10 of 13 Old 07-23-2014, 10:33 AM
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Thats great news, I have the exact same one from them coming in mail...thanks for the posts guys..

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post #11 of 13 Old 07-23-2014, 05:44 PM
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JFYI, you'll probably be upgrading that Cobra CB at some point.

It is with out a doubt the worst CB radio out there.

Least amount of power
worst performing.

Don't get me wrong I liked the idea of it at first too when I bought a used one. to replace my 15-20 year old one I had. Guess what I never had anything but issues with it, others in the jeep clubs I ran with had nothing but issues with them. and everyone ended up shit canning them, or pawning them off on some other sucker for an upgrade.

Good luck with yours though if you don't wheel alot or hardly ever use one I'm sure it will be fine.


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post #12 of 13 Old 07-24-2014, 12:35 AM
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Glad the new radio solved the problem. Only thing I hate worse than chasing electrical problems is plumbing,

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post #13 of 13 Old 07-24-2014, 09:41 AM
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Quote:
Originally Posted by azoth99 View Post
JFYI, you'll probably be upgrading that Cobra CB at some point.

It is with out a doubt the worst CB radio out there.

Least amount of power
worst performing.

Don't get me wrong I liked the idea of it at first too when I bought a used one. to replace my 15-20 year old one I had. Guess what I never had anything but issues with it, others in the jeep clubs I ran with had nothing but issues with them. and everyone ended up shit canning them, or pawning them off on some other sucker for an upgrade.

Good luck with yours though if you don't wheel alot or hardly ever use one I'm sure it will be fine.
Agreed - I had one of these all-in-handset CB's as well. It was horrible on the trail, people could barely hear me. Upgraded to a Cobra 29LX which was only about $25 more and all was fine. And the full size radios include built in meters so you don't need to spend the $10-$15 on a standalone SWR metr.
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