Question about Cobra 29 LTD CB Radio

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ANT indicator light comes on when mike is keyed. WHY?

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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.

Posted on Jan 15, 2009

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To tell you its on

Posted on Jan 10, 2009

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When i press the mike two red lights are coming on end the reception isn't good how do i fix this problem


Green changing to Red it normal operation from receive to transmit.

However the ant light should not light it is to indicate the SWR= standing wave ratio.This does not normally indicate any reduction in you ability to receive signal it only refers to reflected power from you antenna system to your receiver/cb. You may have a insulator in the wrong location. If it is an solid mirror or body mount the mount must be grounded with no insulator on coax side and an insulator on the antenna top of mount antenna must not be grounded.
If you have a coax that is damaged and i mean even bend from pasting thru a door or other "pinch point" it may be bad.
http://www.firestik.com/Meas-SWR.htm

Sep 16, 2011 | Cobra 29 LTD CB Radio

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

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

1 Answer

29 LTD CB Radio: all i have is a new 29ltd with a will 2000 ant whe...


Well, i,am wondering.what kind a problem you having.......all looks good to me....just key the mic.....and say Hi ....enjoy...........

May 18, 2010 | Cobra 29 LTD CB Radio

1 Answer

TO SETUP MY SWR, SHOULD I USE THE METER IN THE RADIO OR AN EXTERNAL SWR METER . THE SET IS THE NEW 29LTD BT. ALSO AT TIMES THE ANT LITE COMES ON WHEN TRANSMITTING. IS THIS NORMAL?


Always use an external meter to set SWR. If the ant. warning light comes on it indicates a problem with the SWR. Check it with external meter.

Oct 19, 2009 | 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

1 Answer

RED TX and ANT light, Cobra 29


Hi,

Your post of 2 lights; 1 is to indicate that you are transmitting when keying the mic is normal. The 2nd indicating an antenna warning (or SWR) should be corrected. You are right in starting with the coaxial cable which of course would include the PL259 connector. Verify that there are no breaks, over-bended loop, exposed ground/shield and that the solder of the center wire as well as the braided shield/ground is in order.

If it is a mobile setup, further verify that the antenna mount (except when magnetic) is properly grounded to the body of the vehicle and free from rust/corrosion. In some instances, it is the antenna itself that need checking or even possibly replacement.

Alternately, if the needle doesn't swing to the right side of the meter when the mic is keyed, it is possible that your finals (2SC1306) needs replacement.

Hope this be of some help/idea. Pls post back how things turned out or should you need additional information.

Good luck and kind regards.

Dec 06, 2007 | Cobra 29 WX NW ST 40-Channels Base CB...

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!!

Aug 16, 2007 | Cobra 148 GTL 120-Channels Base CB Radio

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