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Old 05-14-2015, 06:31 AM   #1
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CB radio

Im trying to hook up a CB in JeNNY. I mounted the antenna on the ladder on the Back but my SWR IS LIKE 3.5. Not good. I was hoping the ladder was mounted on a medal frame making a ground. Has anyone been able to install a CB in the FR3 and get a good SWR reading? I'm going to run a founding wire from the antenna mount down to Jenny's frame this weekend, gee I hope that will do the trick.Click image for larger version

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I ran 50' of coax under JeNNY and come up thru the motor hatch between the seats.


JeNNY (2015 FR3 / 30DS)
2000 Jeep TJ Moab Rock Crawler
2013 Jeep JK
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Old 05-14-2015, 06:51 AM   #2
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Wayne from the looks of it you are electrically shorting out the antenna mounting it that low, the ladder is a radiator as well. The antenna should be above the ladder as a start. At 50 ft that is a lot of loss at CB Frequencies. What type of coax did you use? Mini RG8 should be a minimum. RG58 would just kill the received signal and transmit power. As you radio is at the from a better antenna location might be beside the Passenger with a short lead.
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Old 05-14-2015, 07:49 AM   #3
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Thanks B&B. I have a Wilson trucker on a 10" mass that I will try. Is the ladder a ground? Do you know.?


JeNNY (2015 FR3 / 30DS)
2000 Jeep TJ Moab Rock Crawler
2013 Jeep JK
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Old 05-14-2015, 10:03 AM   #4
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Hmmm I wonder if I were to attach a plate to the top of the ladder rails, drill a hole in the center and mount my antenna on a spring if that would help the SWR??


JeNNY (2015 FR3 / 30DS)
2000 Jeep TJ Moab Rock Crawler
2013 Jeep JK
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Old 05-14-2015, 11:18 AM   #5
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Wonder, would aluminum plate work?


JeNNY (2015 FR3 / 30DS)
2000 Jeep TJ Moab Rock Crawler
2013 Jeep JK
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Old 05-14-2015, 04:26 PM   #6
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A better answer would be to get a marine antenna! Also a RG-8 coax would be better for that length. Much less signal loss. Attach the base to any solid surface. An 8 inch ring at the base would help even more if attached to the metal part of the cable.
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Old 05-14-2015, 07:48 PM   #7
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I got it figured out. My SWR with this set up is 1.6 on 1 & 40 and 1.5 on 20. Not bad for a 4' tune able tip fire fly antenna. I do have a Wilson 5000 trucker antenna, I'm going to spin that on and see if it gets a lower SWR. Once I got a good ground wire from the antenna bracket to the frame it came in pretty good. At these SWR readings I'm loosing about 6-7% of my CB's power. I'll give a update once l try my Wilson 5000 trucker antenna.


JeNNY (2015 FR3 / 30DS)
2000 Jeep TJ Moab Rock Crawler
2013 Jeep JK
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Old 05-14-2015, 08:28 PM   #8
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I was shocked to read CB. Last time I heard that was Burt Reynolds in Smokey and the Bandit!! Hope you get your problem fixed.


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Old 05-16-2015, 08:12 PM   #9
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I did. And have s good SWR setting now. 1.6 on ch 1 & 40 and a 0 on ch 20. I ran a grounding wire from my antenna mounting bracket down to the inside passengers frame rail just aft of the fuel tank. Great spot there for a good ground. I used 50' of high quality coax that l ran along the passengers frame rail on the outward side of the frame all the way up front. I opened the Engine hatch and brought the coax inside from there.Click image for larger version

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Using sticky velcro I attached the CB mounting bracket to the dash, same with the mic holder. Very clean install and for a RV pretty good SWR match. My antenna is a 4' fiberglass tune able tip fire fly, the radio is a realistic TRC-465 SSB 40ch that's peaked, tuned and unlocked. So far I've talked about 20 miles.Click image for larger version

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JeNNY (2015 FR3 / 30DS)
2000 Jeep TJ Moab Rock Crawler
2013 Jeep JK
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Old 05-16-2015, 08:25 PM   #10
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CB radio

Geeze don't p off sherry and wayne on the road or they will have "Jenny " shoot you with that massive tank mounter on the dash!

I assume One or both of you is ex military?.




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