Question about Cobra 29 LTD CB Radio

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When I key my mike my antenna light comes on - Cobra 29 LTD CB Radio

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Pay close attention.......IT IS NEVER "NORMAL" ON SOME RADIOS FOR THE SWR LIGHT TO COME ON IF EVERYTHING IS GOOD! The SWR light is a warning light that your SWR's are to high. That light can be wrong because there is an adjustment inside the radio to set that light to come on (I have set mine on many radios). You do need to check your SWR's with a meter and it is free at cb shops. If it shows a good SWR, have the tech adjust the setting inside the radio but it is likely that you have a bad SWR and do not use the radio until you have it checked because you will fry the transmit final.
"WILDCAT" IN LAURELVILLE OHIO
35 YEARS IN THE CB WORLD!

Posted on Dec 30, 2010

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Hi, my name is John. ..On some radio,s that is normal, however, Have your SWR checked to be sure. They can do this at Radio Shack for free or some CB shack.... hope this was helpful...

Posted on Aug 31, 2010

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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.

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1 Answer

Antenna light comes on


if you are talking about the AWI light you have a high SWR on channel 40 you want to bring that reading down so you should reset your SWRyou may only be able to get it down to a 2.1 but its better than what you have. and its only a 15% power loss which you cannot tell the difference in without agood set of ears.

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1 Answer

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Sounds like bad SWR. Check antenna ground. If mag mount, make sure mag and whe you put it is very clean. Check antenna where whip comes in to coil or base. Check pl259 with vom for continuity, open or shorts. This will probably solve the problem. DO NOT TRANSMIT WITH HIGH SWR. YOU CAN BURN OUT POWER TRANSISTOR. HOPE IT HELPS.
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if you see the red light come on before you even set the swr you already have a problem.set the radio on cal and set the needle at the cal arrow.no unkey the mic . set the meter for swr and key it again.write this # down . go to ch 40 and do the same thing, then go to 19 and repeat. now that you have your readings you need to set the antenna. Now check it again for swr on 1-40-19keep doing this until you get an even reading on those channels.

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1 Answer

When i key in both green lights turn red. is this normal ?


One of the lights is marked RX/TX. This light normally turns red when you press the mike key. The other light indicates a bad SWR if internal circuits are properly aligned. If someone has turned the pot which sets the level at which the light comes on, it may come on when you press the mike key. Check your SWR with an external meter to see if you have problems in the antenna system. The way I set this light in my shop is to put a 150 ohm resistor on the antenna connector and set the control so that the ANT light just comes on.

Jun 15, 2011 | Cobra 29 LTD CB Radio

1 Answer

My rx/tx light is green untill i push on the mike. then the light turns red. and the antenna led theres nothing. whats could be the cause and the fix...and the swr metter goes into the red all the way to...


Its working alright then...what the antenna light is for in case the SWR is too high. If it does not come on---Then it means your antenna works good.

May 16, 2011 | Cobra 29 LTD CB Radio

2 Answers

What would cause the ant light on a stock cobra 29 ltd to come on when i key the mike. And if it is an antenna problem what do you think would be the best for this radio,I am an over the road truck driver...


Hello, My name is John, Hope I can assist you...The light that comes on when you key the mike is a RF indicator, meaning you have RF power, meaning your unit is fine for talking if it is the TX light, some lights will blink as you talk. Have your SWR checked at a CB shack, or Radio Shack, etc. Enjoy.Cobras are great radios.....Hope this was helpful........

Jul 17, 2010 | Cobra 29 LTD CB Radio

2 Answers

When i key up the mike the tx/rx light and the ant


your swr setting are off wack fix your swr

Oct 02, 2009 | Cobra 29 LTD CB Radio

2 Answers

ANT indicator


Something in your antenna setup is causing high SWR reflected back into the radio. Antenna could be ungrounded? Have you tuned that antenna? Any part of the coax broken or pinched in a door? Where is he antenna located on the vehicle? Are you parked under or near a metal building? All of these things can cause high SWR reflect. Let me know if you need help in tuning your antenna or getting it set up.

Jan 10, 2009 | Cobra 29 LTD CB Radio

1 Answer

Cobra 29GTL Won't Transmit


if the red ant light comes on this means that you have antenna trouble either in the antenna itself or the coax but this should not have anything to do with the radio not transmitting. it sounds to me that you have a bad audio chip or a bad power output transistor. in either case you should really take it to a cb shop and let the professionals solve your problem, good luck!!

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