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firefighterwhiskey 10-01-2012 07:05 PM

HELP tune my CB
Is there anyone or do you know of any one that can help me tune my cb? I have it installed and have a swr and cant get it tuned correctly.. I have played with ground locations and everything I could think of...

Colo-TJ 10-01-2012 07:28 PM

where are you located?

jagerhelix 10-01-2012 07:52 PM


Originally Posted by firefighterwhiskey (Post 2850245)
Is there anyone or do you know of any one that can help me tune my cb? I have it installed and have a swr and cant get it tuned correctly.. I have played with ground locations and everything I could think of...

You have a firestick right?
Do you have an isolator between the antenna and the mount? It's a little ring that separates your antenna from the mount. If not you will find it nearly impossible to get a good SWR since your coax will be trying to transmit through the mount and anything that touches as well. Also, check the length of your coax. You don't want more than you need, you also don't want any coiling of excess line as it can also cause poor SWR.

If it's none of that, let me know what it's doing.

firefighterwhiskey 10-01-2012 08:31 PM

Im in colorado springs.. If you are talking about the little plastic ring yes I have that have 18 feet of coax. and the swr reading Im getting is ch 1 is way high in the red but ch 40 is at just above 3

Colo-TJ 10-01-2012 08:33 PM

need to tune on 20...middle of the band. also 18' is a lot more than you need. how is the extra coiled up?

firefighterwhiskey 10-01-2012 08:41 PM

I only have about 3 feet left and I have it coiled in a long oblong loop.

jagerhelix 10-01-2012 09:10 PM

Does your SWR meter or cb have a Calibration dial? Not trying to insult intelligence here, but has it been set on Cal? 3 is very high, and if it's even higher on the lower end of the dial it can actually harm your radio. High SWR is no buenos. Does your antenna have a tuning screw on top?

firefighterwhiskey 10-01-2012 09:15 PM

yes I have a radio shack swr meter and yes I it has the tuning screw.. I have tried everything I can think of..

jagerhelix 10-01-2012 09:21 PM

wish I was around to peek at it. Do you know if your CB has ever been keyed without the antenna plugged in?
I have the same SWR Meter so as long as you've set the needle to cal on the dial when it's switched to cal, then switched back to SWR when testing that's all that can be done on the meter's end. When you screw the tuning screw all the way in, and all the way out do you notice a predictable difference? As in unscrewed it always goes up, or screwed in it always goes down? Or is it completely random when you try to adjust?

firefighterwhiskey 10-01-2012 09:28 PM

Its random I was messing with it today.. Everyone else has told me its the ground on my mount but I have tried different places and ground wire no ground wire Im lost now.. I have not tried all the way up or down either way I cant get one number under 3 one will get just under 3 and the other is still in the red. I re ran my coax so its not by any electrical wires..

Colo-TJ 10-01-2012 09:30 PM

check your coax to make sure that when it was pulled through everything that the insulation wasn't cut and grounding out. other than that I am at a loss as well. jager asked some great questions. the radio itself might have some issues.

Justin04Lj 10-01-2012 09:31 PM

I've only tuned mine once. Its only a cb. It doesn't have to be perfect

Colo-TJ 10-01-2012 09:32 PM

maybe find someone that has a well tuned antenna and try it their rig.

Colo-TJ 10-01-2012 09:33 PM


Originally Posted by Justin04Lj (Post 2851129)
I've only tuned mine once. Its only a cb. It doesn't have to be perfect

it has to be between 1-2 or you are risking a fried unit.

firefighterwhiskey 10-01-2012 09:33 PM

yah Its a brand new CB just put in on saturday..

Justin04Lj 10-01-2012 09:37 PM

O sorry

jagerhelix 10-01-2012 09:58 PM

Hoping it's your ground and not the radio. Where have you tried mounting? Grounding to paint can cause issues. Also grounding to a swing away carrier that has rubber bushings can also disrupt your ground because the rubber is a great conductor. Make sure your ground goes to a chassis mount. Firestik website actually is a fantastic wealth of information as far as CB and antenna's work and should be installed. Give a browse over there to help out as well.

Tech-Docs Index

I'm gone for a few weeks so hopefully you can get this figured out before I am back, but if not I'll see what I can do.

firefighterwhiskey 10-01-2012 10:09 PM

Yah Im going to try to find a better ground location tomorrow.. I have it now to a ground screw where my tail lights ground but its all painted and have scraped the paint off but dont think thats helping so Im going to find a better place

firefighterwhiskey 10-08-2012 05:59 PM

Ok I still can't get a good swr the best I can get is just under 3 on ch 1 and ch 40. Tested everything and have good grounds now and no kinks in coax and its not wound up any one have any suggestions? I'm lost now and getting frustrated with this.

mlebofsky 10-11-2012 05:10 PM


Originally Posted by jagerhelix (Post 2851289)
..... the rubber is a great conductor ...

Did you mean insulator ?

jagerhelix 10-11-2012 05:36 PM


Originally Posted by mlebofsky (Post 2881443)
Did you mean insulator ?

You got me... yes, I meant insulator. :thumb:

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