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Old 12-04-2011, 09:34 PM   #1
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CB Radio Questions

I just put in a cb in my jeep and i bought it from a friend for $10 and he had it hooked up his cigarette lighter for the power to it.

I mounted the antenna to my rear bumper. But when i turn on the cb it is all staticy and the static is loud if i have the antenna hooked up but once i unscrew the antenna, it gets soft and if i touch the bumper with the cable, it gets loud again...

My dad said that it might be because it is not grounded. But i dont know if that is right..

And if it not grounded, could it be because it it hooked into the cigarette ligther??


Any info would prolly be helpful so feel free to say anything!

Thanks

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Old 12-04-2011, 09:38 PM   #2
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I'm gonna move this to Communications and Electronics for you :thumb should get more views there.

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Old 12-04-2011, 09:45 PM   #3
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I'm gonna move this to Communications and Electronics for you :thumb should get more views there.
How do i make it there right when i post it?
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Old 12-04-2011, 09:48 PM   #4
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Originally Posted by stuckinwater

How do i make it there right when i post it?
Go to the section you want to post in and hit "new thread" like you did. Looks like you were in the "New member check-in" section by mistake.
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Old 12-04-2011, 09:50 PM   #5
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You should get static when everything's hooked up and you turn the radio on. Turn your squelch up until you don't hear static anymore. Call out for a radio check and see if you get an answer.
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Old 12-04-2011, 10:02 PM   #6
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You should get static when everything's hooked up and you turn the radio on. Turn your squelch up until you don't hear static anymore. Call out for a radio check and see if you get an answer.
Do i need to put rubber rings between the bumper and the antenna/cord? My friend said that the metal bumper said that the bumper will mess up the signal...
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Old 12-04-2011, 10:12 PM   #7
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This is view of a standard antenna stud. You should set it up exactly like this. The stud needs to contact metal to complete the ground or the radio will not work properly.
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Old 12-05-2011, 09:45 AM   #8
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I did a tire mount on mine, had same trouble took it to a shop, the rubber washer fixed it, make sure you hook it
up to a SWR (short wave radio) meter to tune it up, otherwise you could damage your cb, and won't be getting all you can get out of it..
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Old 12-05-2011, 11:12 AM   #9
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SWR is the abreviation for Standing Wave Ratio that is a ratio of antenna impedance to the transmitters impedance.
Practically you want the antenna frequency to be the same as the radio frequency. An SWR meter helps you adjust the antenna.

AM CB radio's are stacticy, that's normal. Make sure your mount is setup as pictured above and the insulated washer is in the right place and pointed the right way.

You might get some noise through the lighter power but only if the Jeep is running. Try it both ways, if there is more noise (static) with the engine running, then power it directly (fused) from the battery.
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Old 12-05-2011, 11:34 AM   #10
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then power it directly (fused) from the battery.
x2. It's the only way to do it.
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Old 12-05-2011, 02:26 PM   #11
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Here's a quick & dirty explanation of SWR, or Standing Wave Ratio. It's an indication of how efficient your antenna system is. No antenna transmits 100% of the signal fed to it, some is absorbed by loss or reflected down the coax back to the transmitter. That reflected power is dissipated as heat. The lower the SWR the lower the reflected power. That's a very simplistic nutshell explanation.
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Old 12-05-2011, 05:18 PM   #12
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Where could i get a SWR so i can tune the radio and antenna?

And i tried talkin on it today, and i could hear my voice on the speakers on the roll bar. It is only on some channels and only sometimes on those channels???

It boggels my mind how its doin that :/
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Old 12-05-2011, 06:41 PM   #13
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Yeah that's what happened to me when I had a bad mount/bad ground. The higher the mount is on the Jeep the better. I believe there are threads out there that talk about the bumper being a horrible place to mount the antenna, don't quote me though. When I didn't have my tire carrier I just used a piece of stainless I bent to make a 90 and used the stock carrier bolt to secure it to the gate. Plus directly wiring it the batter (w/ a fuse) will definitely cut down a lot of noise. Also make sure you're using good COAX cable.

You need an SWR meter to tune the antenna, not radio. You can get one online easily.
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Old 12-05-2011, 07:52 PM   #14
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So to have it not come over the speakers in the jeep, i have to take the antenna off the bumper??

Is that what ur sayin?
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Old 12-05-2011, 08:00 PM   #15
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Amazon.com: SWR METER for CB Radio Antennas with 3' Jumper cable - Workman SWR2T & CX-3-PL-PL: Automotive

I looked up a swr meter, and i got this? Is this what a swr meter should be like?
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Old 12-05-2011, 08:42 PM   #16
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^^^ Yup.
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Old 12-05-2011, 08:59 PM   #17
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Well thats good. Once i get some money, ill prolly buy that or something like it. Or just ask my friends and see if they have one
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Old 12-05-2011, 10:28 PM   #18
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So to have it not come over the speakers in the jeep, i have to take the antenna off the bumper??

Is that what ur sayin?
Might be something good to try.
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Old 12-06-2011, 07:19 PM   #19
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Well thanks for the info. And another friend of mine gave me a cable and antenna. The antenna is a Power Buster antenna but idk what the cable is.. Would that mess anything up with the signal
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Old 12-07-2011, 10:02 AM   #20
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You're hearing your voice in the speakers because the speakers' wiring is acting like an antenna and the speakers are reacting to the voltage being induced in them.

There are a few methods to help with this, including adding a bypass capacitor between the each speaker's connections, but the easiest thing to do would be to make sure you tune the antenna well. That by itself should fix the issue.

You said you bough the CB from a friend. Did your friend have any "work" done to it? Apart from being illegal, modifications to a CB (such as to increase output power) can also cause it to transmit outside of acceptable limits and "splatter" across a wider frequency bandwidth. This too will cause unwanted interference.
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Old 12-07-2011, 10:10 AM   #21
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I built my own taillight antenna mount and put in on yesterday, I will post some pics later, its kinda like the one on qtec but this is my own design, and it does have a bolt hole through the tub for extra stability and proper grounding, and I will make more for considerably less than qtec's price of $35
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Old 12-07-2011, 02:52 PM   #22
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Quote:
Originally Posted by kfdjason7620
I built my own taillight antenna mount and put in on yesterday, I will post some pics later, its kinda like the one on qtec but this is my own design, and it does have a bolt hole through the tub for extra stability and proper grounding, and I will make more for considerably less than qtec's price of $35
Sounds cool. I might be interested after you post the pics.
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Old 12-09-2011, 04:55 PM   #23
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You said you bough the CB from a friend. Did your friend have any "work" done to it?


I do not know if he had any work done to it but i doubt it. Hes the reall technical guy...

And kfdjason7620 I might take you up on that offer too after you post some pics of ur tail light mount
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Old 12-09-2011, 05:26 PM   #24
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Best pics I can get in the dark guys, but a popular Jeep website wants $35 for these bad boys, my design is made of 1/8" 304 grade stainless steel and sandwiches in-between the body and ORIGINAL tail light of the tj with the 3 bolts in taillight, don't know about the yjs. You will have to drill a 1/4" hole in the tub for proper grounding and even more rigidity. Looking at about $5 shipping and handling, make me an offer with the $5 added
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Old 12-09-2011, 07:48 PM   #25
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It will work for a YJ as well. Just like the Teraflex product, just a bit cheaper LOL
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Old 12-09-2011, 07:55 PM   #26
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It will work for a YJ as well. Just like the Teraflex product, just a bit cheaper LOL
$30 cheaper! wish I would have seen this before i bought mine!
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Old 12-09-2011, 08:00 PM   #27
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Mine too - I'm worse off because mine is sitting on my toolbox since I put my LED tails in.
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Old 12-11-2011, 01:47 PM   #28
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Best pics I can get in the dark guys, but a popular Jeep website wants $35 for these bad boys, my design is made of 1/8" 304 grade stainless steel and sandwiches in-between the body and ORIGINAL tail light of the tj with the 3 bolts in taillight, don't know about the yjs. You will have to drill a 1/4" hole in the tub for proper grounding and even more rigidity. Looking at about $5 shipping and handling, make me an offer with the $5 added
I am wanting to make a mount just like urs but i have some sheet metal layin around and was wondering if that will work???

I was thinking about bending it at the bottom so that it will contuor to the shape of the tail light and then bolting it to the tub just like you did...

Would that work like ur does?
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Old 12-11-2011, 02:09 PM   #29
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I believe it will work
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Old 12-11-2011, 02:23 PM   #30
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I posted many times on this issue because i had lots of problems with my CB radio when the antenna was mounted on my bumper. As soon as i moved the antenna to the stock tire carrier i had no more problems. From my experience i would say the bumper is the worst spot to mount the antenna because it does have the worst ground.

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