Question about Cobra 29 LTD CB Radio

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I have a cobra 29 lx le hooked to a francies 5.5 whip om my 2007 kw t 600 am getting anyenna warning both radio and antenna are new frustrated

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Have the SWR or match on the system checked, high match does not mean a bad antenna but can be a open or short in the system for the antenna.

Posted on Dec 12, 2012

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

Benimur
  • 6966 Answers

SOURCE: New Cobra 29 ltd

Hi,

Appreciate the direct "Ask Me". If I may clear up your concern:

  • you have two CB radios, one is a Cobra 29LTD and the other?
  • both have received and both do not transmit;
  • you have two trucks, one with a Firecracker 1000 antenna, and the other?
In any case and initially, TX (transmit problems) could be caused by:
  • defective PTT/mic;
  • defective finals/drivers;
  • defective PL-259 connector/RG58 Cable;
  • antenna grounding/SWR;
  • other electronics internally
Please check the above. You may need an SWR meter, a watt meter and a DVM/VOM to perform the tests.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information. Good luck and kind regards. Thank you for using FixYa.

Posted on Nov 05, 2008

  • 25 Answers

SOURCE: calibration problem

Changing the length of the mast more then likely made your antenna to short, and therefore impossible to tune.

Posted on Jul 14, 2009

  • 33 Answers

SOURCE: Cobra 29 LTD Bluetooth

You got your radio peaked? Most likely, however, the pot for the antenna warning indicator is VR6. I always check that after peaking a radio.

Posted on Jul 28, 2009

anymhz
  • 500 Answers

SOURCE: cobra 29 lx le radio

check the swr's

Posted on Feb 26, 2011

  • 1 Answer

SOURCE: 29 lx le new 200

The "Antenna Warning" came up on my radio too, a new Cobra 29LX, but I found another bunch of people having the same problem. This alert that you are seeing is only supposed to basically come up on that screen if there antenna is not connected. There is a simple adjustment inside the radio. The component is a little potentiometer that has to be turned with a little tiny screw driver. You can do this yourself, just look for the PDF file online that explains and shows you how to do it in a few seconds.

Here you can finds the link to the PDF file right here.
http://www.thetruckersreport.com/truckingindustryforum/cb-radio-forum/147114-i-need-some-help-antenna-warning-5.html

This is an easy adjustment. I fixed my false warning in a few seconds.

Posted on Jun 17, 2012

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1 Answer

How do i repair finals in cobra 29 lx


first of all are you sure its a bad antenna. I can key the mic with no antenna hooked up and nothing will happen the the finals but you may key it down with a brand new antenna and burn them also.Lokk and see how they are connected in the radio before you take it out and replace it the same way.You may want to replace your driver also.

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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 your readings are below 0.5 with a dipole that is a excellent swr reading, most fall in the area of 2.0 or higher, you will not harm your RF output transistor, if you are getting antenna warnings see if you can recalibrate it.

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29 lx le new 200 wilson antenna new coax and radio .we set the swr with a good meter at 1.2 and the radio says 3 or so and the message on the radio says cb antenna warning.and we doudle check the swr with...


what kind of meter? I would go by what is in the radio unless you are using an analyzer.

You may also be getting common mode current. take 6 to 8 inches of coax and make a tight coil about the same size as a spray paint can. Hold it together with electrical tape.

Use the meter in the LX LE to set the SWR then check with the other meter.

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1 Answer

Cobra 29 LX LE antenna warning flashes when u key the mic and thiers no signal whats wrong


I am having the same problem with mine....I bought it new and it worked fine for a week.. How did you fix yours?

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Just bought a workman 3000 to 7500 watt cb antenna, ever heard of it?? Im going to hook it up at work monday, got a cobra 29 ltd + or - 30 watt output. 9' coax. the antenna has 8" of swr adjustment... for...


cobra 29 has a 12 watt final, doubt you will be doing 30 watts. 25 if your lucky. Use 18 feet of coax, you will get better broad band.

If the antenna comes with the whip in it already, its been tuned at the factory and you shouldn't change it yet.

If not, half way is okay. It still needs to be tuned on a meter. either the one in the radio or an inline.

Mar 06, 2010 | Cobra 29 LTD CB Radio

1 Answer

Calibration problem


Changing the length of the mast more then likely made your antenna to short, and therefore impossible to tune.

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