Question about Cobra 29 LTD CB Radio

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Calbration I have done the calbration then I got a new truck with bulit cowex cable and my antenna light comes on and I don't get the distanes I used to

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  • Anonymous Aug 12, 2008

    The antenna light comes on on only a hand full of channels also on more channels when the truck is running. if I turn the truck off the light goes out on some of the channels. However the swr on most channels is good. I have never seen this before???

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  • 12 Answers

Recalibrate your SWR's. They can change if you swap from one Vehicle to another.

Posted on Aug 14, 2008

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2 Answers

I have 2 cobras 29 radio always worked good till recently. Have a rk56 mic I can hear but can't talk. Mic keys up but they hear nothing bought a new 29 chrome digital read out and a new mic just a wood...


fiberglass,no ground plane. Did you use the meters on the radios to match your antennas or a seperate external antenna.you might have to run your own coax and hook up a mirror mount bracket and put your favorite antennas on them then match them and ground them to the chassis use common sense to show you what to do next and you should be getting out great. Sometimes people change the antennas on those trucks with built in antennas and don't realize that the coax has just fallen out of site into the body somewhere. thats why I said install your own.

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Antenna red light comes on when mike is keyed. Radio checked, no problems. Installed in Mack 2012 Pinnacle Dump truck


there are two lights for the antenna.when you are transmitting the top light will change from green to red the bottom shouldn't be on.this is the awi light. it means there is a problem with the antenna system, and you should get it checked. It could be the antenna swr ,bad coax,or the radio.Since you can't do anything with the coax or radio it has to be done with the antenna. Get a real SWR meter and check the SWR or have a tech do it. If the SWR is ok then your antenna just might be in the wrong spot ,or it may need to be grounded A tech will tell you the problem as soon as he puts his meter on it.

Apr 17, 2014 | Cobra 29 LTD CB Radio

1 Answer

I have had a Cobre 29 LTD Classic, a 29 NW LTD Classic and now a 29 LTD Chrome.It seems that the first two died because of possible bad antenna connections. I was able to calibrate the radios and adjust...


I see two possible problems. First, with a magnetic antenna it is difficult to get the proper ground for the antenna. Make sure the magnetic base is clean as well as where you place it. Second, try running your power lead DIRECTLY to the battery and not using the cigarette lighter. Hope it helps.
Tom

Feb 27, 2013 | Cobra 29 LTD CB Radio

1 Answer

I have had a Cobre 29 LTD Classic, a 29 NW LTD Classic and now a 29 LTD Chrome.It seems that the first two died because of possible bad antenna connections. I was able to calibrate the radios and adjust...


HELLO STAN FIRST HAS THE RADIO BEEN PEAKED AND TUNED? SECOND IS THE INTERIOR LIGHT IN YOUR PICK UP RIGHT BELOW YOUR ANTENNA,IF SO YOU HAVE A PROBLEM BUT EASY FIX THE WIRING GOING TO THE LIGHT ACTS LIKE AN EXTRA ANTENNA CAUSING YOUR ANTENNA TO RESONATE TO YOUR RADIO CAUSING THE A W I LIGHT TO COME ON MOVE YOU ANTENNA BACK A LITTLE FUTHER AND SHOULD BE GOODif you want to get a bettter antenna get a willson 500 mag mount far better

Feb 27, 2013 | Cobra 29 LTD CB Radio

3 Answers

Red lights come on tx n rx and antenna come on when I key up the cb radio and the swr meter doesn't move


if a mod has been done to the cobra 29 (all 29,s)the light will come on just find vr6 audio the radio as it comes on adjust vr6 untill it goes away,,,,always trust your watt meter(s.w.r scale)over the flashing light its really easy to do it beats paying a shop $10-$15

Jan 13, 2013 | Cobra 29 LTD CB Radio

1 Answer

Just bought a cobra ltd crome ive mounted every thing how to i clibrate it with my attenna? when i key up both rx/tx and ant lights up red?????


This is a common misunderstanding when it comes to communications equipment. You don't tune the antenna to the radio, but rather you tune the antenna to the vehicle. the vehicle is the ground plane for your antenna system.

With that said You will need an SWR Meter between your antenna and Radio. follow the instructions for your meter for calibrating the meter and follow the instructions for your antenna for adjusting the length.

Jul 14, 2011 | Cobra 29 LTD CB Radio

1 Answer

Uniden pc78elite antenna light


What kind of antenna is it? Have you checked your standing wave? To do this process you will need a field strenth or a SWR meter to do it,would be cheaper to have it checked at Radio Shack or you can buy one,and do it yourself. Some radio antenna light come on when transmitting,....hope this helps....

Mar 15, 2010 | Uniden PC78ELITE 40-Channels Base CB Radio

1 Answer

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Well,first hand ,some cobra radio,s have red some have green RX/TX lights, but are you modulating? Some green lights turn red. What is your standing Wave on the antenna,s? You need to check it and the output of the radio. To do this you need a watt or field strenth meter. Can get one at Radio Shack. Your standing Wave is ok as long as it is below a 2. That has to be done on the antenna. ..hope this helps...

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1 Answer

Procedures to install cb antennae mount


The end without a connector was once attached to an antenna. You need a proper antenna in order to use the radio. If you were to buy a new antenna, it will come with a length of cable attached. Even if you were to buy a new antenna, don't expect good performance from the radio unless you get the antenna properly adjusted. Yes, it will work "out of the box", but probably not as good as it could. There is a device called an SWR bridge, it's used to measure the SWR and the user then adjusts the antenna for the lowest reading by trial and error adjustment of the antenna.

Jan 23, 2009 | Cobra 18 WX ST II 40-Channels Base CB...

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Red Lights


Thoroughly check your antenna connection, be certain the plastic grommet is in place (and not cracked) between the bottom of the antenna adaptor stud and your antenna mount, and check for corrosion in and around your antenna connections. If using a fiberglass antenna, check for cracked outer insulation. If a whip, be sure the Allen screws are tight and the antenna is getting a good connection. If you have a base-loaded whip antenna (Wilson 2000) make sure the base coil plastic case isn't cracked. If you find anything wrong, invest in a new antenna. If all that checks out, buy a new 18 foot piece of coax (around $20, or get the best quality you can afford) and run it to the antenna. You may have skinned the coaxial shielded outer insulation somewhere in the uninstall/install process, it only takes one tiny break to cause problems. Be sure not to run the coax through the door jamb or a window where it WILL be pinched and cause trouble, take time to run it under the dash and out a permanent vent access or through the firewall.

Nov 20, 2006 | Cobra 29 LTD CB Radio

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