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Old 11-27-2011, 05:24 PM   #1
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Question Anybody know about CB and FM Antennae?

The antennae for my stock radio disappeared and I will be installing a CB Radio sometime soon. I was thinking it would look nice to have two matching antennae (one for FM and one for the CB) on my Jeep, not unlike the two CB antennae I have on my big truck. I would also consider just one big whip if it would serve both functions but I don't know if this is possible. Any suggestions?

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Old 11-27-2011, 05:26 PM   #2
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One antenna will not work for both. You can get a steel whip cb antenna that will work and look kinda like the stock one

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Old 11-27-2011, 05:48 PM   #3
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Originally Posted by jkaufman_95 View Post
You can get a steel whip cb antenna that will work and look kinda like the stock one
Know where I could get one?
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Old 11-27-2011, 05:51 PM   #4
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Originally Posted by Briangr

Know where I could get one?
A steel whip? About any truck stop in the world
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Old 11-27-2011, 06:25 PM   #5
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You can get an adapter to run the stock antenna on cb too, they don't work as well as a deticated cb one but that is an option.

Any two way radio shop will be able to get you a loaded coil and antenna if you wanna go that route.
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Old 11-27-2011, 06:28 PM   #6
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Thanks jkaufman_95. I might have to go to a CB specialty shop to find a set that are the same length. I travel more than 3,000 miles per week, but all the CB shops have closed up along the routes I have been traveling the last couple of years. Might have to find some work down south.
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Old 11-27-2011, 06:32 PM   #7
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You can get an adapter to run the stock antenna on cb too, they don't work as well as a deticated cb one but that is an option.

Any two way radio shop will be able to get you a loaded coil and antenna if you wanna go that route.
Thanks Ibuildembig, I will look into that. I am either going to do twin antennae like a big truck (which is not too trail friendly, I know), or a long whip off the back spare mount, similar to the Army Jeeps I used to drive.
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Old 11-27-2011, 07:55 PM   #8
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Know where I could get one?
radio shack
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Old 11-28-2011, 11:38 AM   #9
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radio shack
Radio shack has fm not cb attennas
Truck stops on the highway all have them :-)
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Old 11-28-2011, 01:30 PM   #10
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Yeah, hit up truck stops...or just shop online...

You cannot run a cb off a standard FM antenna, but as mentioned, you can use a cb antenna to also pull in fm for your radio if you purchase the adapter (which is pretty inexpensive). You can also buy replacement fm antennas for next to nothing which is what I personally would do.
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Old 11-28-2011, 03:10 PM   #11
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Yes you can run a CB off your stock antenna....that's why I said they make an adapter
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Old 11-30-2011, 07:16 PM   #12
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I bought a firestick for the CB and put in Sirrius with a little flat magnetic antannae stuck to the side of the windshield.
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Old 11-30-2011, 07:29 PM   #13
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Google search "jeep CB style radio antenna" they are really cool!
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Old 11-30-2011, 07:45 PM   #14
Knows a couple things...

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Personally, I would use a true CB antenna for your CB which will work better (allow your CB to transmit/receive further) than connecting an adapter to a standard AM/FM antenna to allow a CB to connect to it. As a radio guy, my best advice is to not try to have matching CB and AM/FM antennas... they work on vastly different frequencies and to try to have them match will not be worth the reduced effectiveness one or the other will have.
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Old 11-30-2011, 07:55 PM   #15
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Can I mount my 3' firestik to my rear bumper instead of like a tail light bracket? I'd assume that would give a solid metal connection
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Old 11-30-2011, 07:58 PM   #16
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Can I mount my 3' firestik to my rear bumper instead of like a tail light bracket? I'd assume that would give a solid metal connection
Absoutely. One good antenna mount like that, available for both the passenger and driver's side, is available from TeraFlex Online Store - Upgrade your Jeep | TeraFlex Suspensions
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Old 11-30-2011, 08:26 PM   #17
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Shweet. Maybe I'll fit into the garage again.
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Old 11-30-2011, 09:24 PM   #18
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Originally Posted by Jerry Bransford View Post
Personally, I would use a true CB antenna for your CB which will work better (allow your CB to transmit/receive further) than connecting an adapter to a standard AM/FM antenna to allow a CB to connect to it. As a radio guy, my best advice is to not try to have matching CB and AM/FM antennas... they work on vastly different frequencies and to try to have them match will not be worth the reduced effectiveness one or the other will have.
Ummmm I am a professional radio guy too

Unless your trying to reach out as far as your transmitter will possibly go, your fine with a piggyback for trail rides with your buddies.
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Old 12-01-2011, 10:29 AM   #19
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Originally Posted by Jerry Bransford
Absoutely. One good antenna mount like that, available for both the passenger and driver's side, is available from TeraFlex Online Store - Upgrade your Jeep | TeraFlex Suspensions
My jeep came with a cb no atenna
I got a four footer screwed it on the bracket
Mounted on the tire carrier now how do I know it's working properly? I didn't tune it or nothing don't know how any advice much obliged thanks jerry ;-)
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Old 12-01-2011, 03:25 PM   #20
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The antennae for my stock radio disappeared and I will be installing a CB Radio sometime soon. I was thinking it would look nice to have two matching antennae (one for FM and one for the CB) on my Jeep, not unlike the two CB antennae I have on my big truck. I would also consider just one big whip if it would serve both functions but I don't know if this is possible. Any suggestions?
An antenna is designed to work for a certain frequency range, usually determined by the length of said antenna.
CB radio frequency range: 26.965 MHZ to 27.405
Car stereo FM frequency range: 88 megahertz to 108 megahertz
Car stereo AM frequency range: 535 kilohertz to 1,700 kilohertz
So a CB antenna would be between 8.68 to 8.54 feet long at a quater wavelength.
On FM a car stereo antenna would be between 2.66 and 2.167 feet long at a quarter wavelenth, so a full wave length would be between 10.62 and 8.67 feet long.
Most shortened CB antennas are longer than the are physically tall due to them having coils of wire wound in spirals around or inside the antenna shaft, that is how they achive the compromise of making the antenna shorter overall, but still having it function well.
A CB antenna used as a car stereo antenna would perform fairly decently, but a car stereo antenna being used as a CB antenna would perform poorly.
One thing to note though is that using a CB antenna as a car stereo antenna has the potential to cause your CB to become directional in how it transmits and receives.
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Old 12-01-2011, 03:28 PM   #21
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My jeep came with a cb no atenna
I got a four footer screwed it on the bracket
Mounted on the tire carrier now how do I know it's working properly? I didn't tune it or nothing don't know how any advice much obliged thanks jerry ;-)
This little SWR/Power meter with a short coax jumper would help you tune your set up. Amazon.com: Astatic PDC1 100 Watt SWR Meter: Electronics
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Old 12-01-2011, 03:36 PM   #22
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Actually it works quite well for just trail riding , put my first one in 25 years ago lol
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Old 12-01-2011, 03:41 PM   #23
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Actually it works quite well for just trail riding , put my first one in 25 years ago lol
What works quite well? For trail riding a hand held works ok unless you get to far away from the other rigs. Ask me how I know, lol
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Old 12-01-2011, 03:50 PM   #24
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A piggyback....on paper you wouldn't think it. I used to get a couple miles range out of mine in highschool which is really all a CB is good for anyway. For anything further than that I would reach for a real radio.
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Old 12-01-2011, 04:25 PM   #25
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A piggyback....on paper you wouldn't think it. I used to get a couple miles range out of mine in highschool which is really all a CB is good for anyway. For anything further than that I would reach for a real radio.
A CB is only good for a couple of miles? I thought you built them big?
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Old 12-01-2011, 05:05 PM   #26
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I do, but you can only rely on a childrens band transmitter so much lol A couple miles over the valley and in the woods is a pretty good challenge where we wheel, so that's where that measurment came from. Point to point and line of sight they will go alot further, but that's what professional radios are for .....but I do make my living selling those radios and not selling linears to cb'rs, so I guess I am somewhat biased. Hell, I am still old school in using a stainless whip over a fiberglass rod for my antenna.....got tired of breaking those chincy firewhips lol
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Old 12-01-2011, 06:01 PM   #27
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I do, but you can only rely on a childrens band transmitter so much lol A couple miles over the valley and in the woods is a pretty good challenge where we wheel, so that's where that measurment came from. Point to point and line of sight they will go alot further, but that's what professional radios are for .....but I do make my living selling those radios and not selling linears to cb'rs, so I guess I am somewhat biased. Hell, I am still old school in using a stainless whip over a fiberglass rod for my antenna.....got tired of breaking those chincy firewhips lol
I perfer a Hustler shaft and K40 stinger to a SS whip, but on a trail rig neither are practical, and the whip isn't allowed on some trails. I do agree that line of sight will limit even the best set up when playing in the hills and valleys, but a good set up should be able to tx 15-20 miles across flat land, and will do so even farther when on higher ground. I would be unhappy if I set up a CB in a rig and it was only good for a couple of miles.
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Old 12-01-2011, 10:29 PM   #28
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Ive never been to a place that wouldn't let me in because of an antenna...but I don't run the 102" whip your probably thinking of. I run a 36" one with a larson loaded coil.

Any radio will work well when on higher ground shooting down, but I seriously doubt any cb would do over 5 miles in the woods when all the leaves are on the trees. And since most people in a group usually stay as a group, that distance is rarely if ever needed. But, that is just my opinion
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Old 12-02-2011, 07:28 AM   #29
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Ive never been to a place that wouldn't let me in because of an antenna...but I don't run the 102" whip your probably thinking of. I run a 36" one with a larson loaded coil.

Any radio will work well when on higher ground shooting down, but I seriously doubt any cb would do over 5 miles in the woods when all the leaves are on the trees. And since most people in a group usually stay as a group, that distance is rarely if ever needed. But, that is just my opinion
You're right, I was thinking of the 102" whip, those aren't allowed on some trails.
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Old 12-02-2011, 08:34 AM   #30
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And might get you hung up on alot of them lol

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