Question about Cobra 29 LTD CB Radio

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I just bought two new antennas for my 29 ltd chrome and the swr is in the red and the antenna light comes on I've set the length on the antenna to different lengths and it dosent change they are diesel 5000 watt antennas how can I fix the proublem

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After installing the antennas I normaly check for shorts. Place a ohm meter from the pin of the PL295 to gnd. If there is no short turn sel. to ch 40 and see where the match between it adn ch01.If SWR is HI on 40 the stingetrs or the top coil needs to be shorter, the opposite is for the lower chan.
If the HI swr on both ends of the spectrom it would most definately be bad connectors or could evenbe a bad ant. or both could be faulty.......Good luck

Posted on Oct 04, 2010

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Posted on Jan 02, 2017

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1 Answer

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

When my calibration needle is all the way in the area my swr is really high


When your needle is all the way in the RED, your swr IS really high. That's what the meter is telling you. You need to clean all of the antenna connection points and adjust the length of the antenna to reduce the SWR (standing wave ratio) which is basically resistance to transmitting signals.

Oct 15, 2013 | Cobra 29 LTD CHR CB Radio Chrome Special...

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

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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

1 Answer

Cobra 29 lx bt antenna fail light coming on


You must set the SWR on your Antenna. There is a little more than just pluggin it in. What type of antenna do you have?

Feb 05, 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

Problem while matching CB


You need to understand how to tune an antenna and how the antenna works.

read this article

How to tune your antenna

and here is a list of causes for high SWR

Oct 28, 2009 | Cobra 29 LTD CB Radio

1 Answer

If i use 2 18 ft. cables, will this help to bring swr down


No. Coax length will not change your SWR, however it may trick the meter. (not usually). Your SWR problem is with your antenna.

With 2 18ft lengths you will make the antenna more broad band, but your SWR will be the same.

Here is a list of SWR problems and solutions.

Here is how to tune an antenna.

Hope this helps.

Oct 20, 2009 | Cobra 29 LTD CB Radio

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I have a Cobra 29 LTD with Bluetooth. I have no static no matter where I set my squelch and RF gain unless my noise blocker is off. Both my rx/tx and antenna lights turn red when mic is keyed. I have try...


if the antenna warning indicator is lighting during transmission then the antenna is either located and.or installed improperly or a defect exists in the antenna mount or the feedline itself, including connectors.

Jun 08, 2009 | Cobra 29 LTD CB Radio

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The red light always comes on while mic is keyed. It is designed to do that. It will blink on and off while mic is keyed if there is a SWR problem. This is explaned in operaters manual.

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