Question about Cobra 29 LTD CB Radio

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Every time i key up my mic the ant light comes on i have a cobra 29 and its a new cable and it was working fine for about the last 4 months and just started acting up on me what could be the problem with it

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  • 35 Answers

Soiunds as if there is some sortof ant problem
If you can hook a dummy load to the ant. connector on rear of the radio that will definately tell you
.

Posted on Oct 04, 2010

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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

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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

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The ant light and the other light light up red when i key the kic


the tx/rx liight is green when your radio is recieving signals and turns red when you are sending signals. the ANT light is red when your SWR is too high (over 3)

1. turn the knob labeled swr cal all the way counter clockwise
2. set the rf swr cal switch to the CAL position
3 key up the mic and hold it while you rotate the swr cal knob until the needle reaches the swr cal postition
4. set the swr cal rf switch to the swr position
5. key up the mic while on chanel one (record the the number)
6. switch to chanel 40 key up the mic (record the number)
if the number on chanel one is lower than the number on chanel 40 then your antenna is too long.

Sep 14, 2009 | Cobra 29 LTD CB Radio

2 Answers

Cobra 29 ltd classic ant light


Your SWR is probably NOT fine. You need to use an external meter if you have had work done to the radio. Especially if you have had a swing mod done to the radio. When you do this, the dead key of the radio is lower then the calibration knob on the radio can adjust for. It will always come up lower then it actually is.

Your radio might have been fine before the work was done on it because it was putting out very little power. Now you are most likely putting out 50 watts or more. Big jump from 4 watts.

When your raise the power in a radio, you will notice more when the antenna is not properly tuned.

In most cases with a stock CB, even when the antenna is not even near tuned, you will get a reading less then 1.5 anyway.

the more power you put out, the more important it is to have a good match.

But an external SWR meter, and check it. be careful if the ANT light is on.

You might also want to check your coax, connections to it, and your antenna for anything wrong.

Apr 22, 2009 | Cobra 29 LTD CB Radio

1 Answer

Cobra 29 LTD Classic not transmitting or receiving


ant. light should only come on if you have a high vswr a bad thing did you check that cb/pa switch is set to cb check your swr this is not a good place to mount ant. as it is close to metal of back of cab

Dec 20, 2008 | 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...

4 Answers

Cobra 29 ANT light


I believe it to be feedback but be aware of your Standing wave ratio because using a linear amp radiates signal to the point that it could cause that light to come on. There is a problem if the radiated signal is feeding back into the amp a a higher level that it can withstand over time.

Sep 08, 2007 | Cobra 29 LTD CB Radio

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