My cb antenna mount - JeepForum.com
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post #1 of 13 Old 07-25-2020, 02:43 PM Thread Starter
metalhead
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My cb antenna mount

Installed my cb antenna mount today. I picked one up from amazon and modified it so I could attach it to metal. I made a small bracket and attached it to the mount. It just clears the hatch. Going to put a 3 foot firestik on it.

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post #2 of 13 Old 07-25-2020, 03:11 PM
ravenworks
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Make sure you have a good ground

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post #3 of 13 Old 07-26-2020, 02:19 PM
rjlindblom
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How are you routing the coax?

Ryan
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post #4 of 13 Old 07-26-2020, 04:04 PM Thread Starter
metalhead
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I am either going to run it through the hatch if I can do it without pinching the wire too bad or I may sneak it in behind the tailight and down under the jeep to a rubber grommet that is under the hatch sill plate and then up the passenger side behind the panels. I got an 18 foot long cable so hope it will reach if I run it behind the tailight.

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post #5 of 13 Old 07-26-2020, 04:46 PM
ColdCase
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Perhaps a couple ideas in here:

https://www.jeepforum.com/forum/f309...4-wk2-2794258/

https://www.jeepforum.com/forum/f309...lease-1683609/

I just got lost in thought. It was unfamiliar territory;
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Previous: 2000 Grand Cherokee Laredo I6, 1979 CJ7 I6 Quadratrac
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post #6 of 13 Old 07-28-2020, 09:39 AM
Dr. Internet
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Originally Posted by metalhead View Post
I am either going to run it through the hatch if I can do it without pinching the wire too bad or I may sneak it in behind the tailight and down under the jeep to a rubber grommet that is under the hatch sill plate and then up the passenger side behind the panels. I got an 18 foot long cable so hope it will reach if I run it behind the tailight.

Coax (coaxial cable) is not the same as speaker or power wires. It is an engineered linear distribution of inductance, resistance, and capacitance designed for a particular function at particular frequencies. One of the characteristics of coax is its impedance (think resistance as a function of frequency). The value of impedance is determined by the radius of the inner conductor, the radius of the outer conductor (shield) and the dialecteric constant of the material between the inner and outer conductors. When you pinch (or exceed minimum bending radius) of coax, you change the impedance. When you change the impedance, you get reflections and a reduction of transmitted signal power.


In short, find a way to get the cable to the antenna without pinching it at all. You should be able to drill a hole somewhere, put in a rubber grommet, run the cable, then use silicon sealant to leak proof the hole.


Good luck, and let us know how it turns out!

Steve

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post #7 of 13 Old 07-28-2020, 02:03 PM Thread Starter
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I ran it through the hatch. It does not get pinched at all. My antenna even came today. If I mounted it on the driver side I could have gone through the grommet thats up near the top of the opening. I wanted it on the passenger side since I will mounting the cobra 75 wx st under the seat.
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Last edited by metalhead; 07-28-2020 at 02:04 PM. Reason: spelling
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post #8 of 13 Old 07-29-2020, 07:51 AM
WK2Overland4X4
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Just a tip, antennas use the vehicle as the "ground plane" so the best range on that would actually be ahead and to the left, with the rear being the least, but with all the reflections, it would be limited any direction. Does anyone use SWR meters to tune antennas anymore?
I used to have a wave on the drivers rear of my 1981 Dodge Van, and it didn't work near as well as a 1/8 wave magnet mount on the roof.
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post #9 of 13 Old 07-29-2020, 02:37 PM Thread Starter
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Just a tip, antennas use the vehicle as the "ground plane" so the best range on that would actually be ahead and to the left, with the rear being the least, but with all the reflections, it would be limited any direction. Does anyone use SWR meters to tune antennas anymore?
I used to have a wave on the drivers rear of my 1981 Dodge Van, and it didn't work near as well as a 1/8 wave magnet mount on the roof.
The cb is only for offroading and in an emergency when there is no cell reception. I am not looking to reach Hawaii with this. Even though I install police radios for a living I did not want to drill holes in the roof because I just spent a grand to get it repainted. I believe my setup will work just fine for what I need it for. Is it really worth spending 30 or 40 bucks for a meter that will only be used once and thrown in a drawer for years? I know plenty of people that use cb's regularly and have not had them tuned. They do just fine.

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post #10 of 13 Old 07-30-2020, 06:12 AM
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The cb is only for offroading and in an emergency when there is no cell reception. I am not looking to reach Hawaii with this. Even though I install police radios for a living I did not want to drill holes in the roof because I just spent a grand to get it repainted. I believe my setup will work just fine for what I need it for. Is it really worth spending 30 or 40 bucks for a meter that will only be used once and thrown in a drawer for years? I know plenty of people that use cb's regularly and have not had them tuned. They do just fine.
No, I get it, just curious. I used to do all the tricks, I had a wave (18'+) mounted on my chimney at home, and I would run the CB on 16-17 volts in my bedroom, got a whole extra watt out of it!
It was the 1980 version of txt messaging your school buddies.
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post #11 of 13 Old 07-30-2020, 04:29 PM Thread Starter
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No, I get it, just curious. I used to do all the tricks, I had a wave (18'+) mounted on my chimney at home, and I would run the CB on 16-17 volts in my bedroom, got a whole extra watt out of it!
It was the 1980 version of txt messaging your school buddies.
Thats funny I did the same thing. I had an 8 foot tall antenna on my roof with a cobra cb out of my dads car. Had a radio shack converter so I could plug it in the house. 2 of my friends both had antennas on their roofs as well. Several times got caught staying up to late on a school night talking. I miss the 80's
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post #12 of 13 Old 07-31-2020, 07:09 AM
WK2Overland4X4
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Thats funny I did the same thing. I had an 8 foot tall antenna on my roof with a cobra cb out of my dads car. Had a radio shack converter so I could plug it in the house. 2 of my friends both had antennas on their roofs as well. Several times got caught staying up to late on a school night talking. I miss the 80's
Yep, mine was a Craig, still have the Radio Shack 12 v bench supply. And found the pot to adjust output voltage.
I still recall my callsign back when you had to get a FCC license for CB.
Back to the OP, how stiff is that antenna? Does it whip around and want to whack the Jeep?
On my van with the wave, I had the gutter rail clip, and racquetball on it to keep it from slapping the side.
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post #13 of 13 Old 07-31-2020, 02:14 PM Thread Starter
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I really haven't noticed while driving. I did flick it around when I put it on and it didn't flop around enough to hit the jeep.
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