Question about Cobra 148 GTL 120-Channels Base CB Radio

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Cobra 29 when you key the mike the channel lights, tran/rec light

Lights goes out

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And if u run too low amperage you will fry your Power regulator

Posted on Mar 20, 2013

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I had a similar problem with another brand radio. My power supply I was running it on was not rated high enough in the amp category. Are you running on a power supply or battery?

Posted on Apr 21, 2009

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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.

Apr 05, 2014 | Cobra 29 LTD CB Radio

1 Answer

When ikey up mike both lights on my cobra 29 LTD are on is this normal


no ,you have a problem with your antenna. Check the SWR and set it so the bottom light goes out and you will be ok

Feb 17, 2014 | Cobra 29 LTD CB Radio

3 Answers

Red lights come on tx n rx and antenna come on when I key up the cb radio and the swr meter doesn't move


if a mod has been done to the cobra 29 (all 29,s)the light will come on just find vr6 audio the radio as it comes on adjust vr6 untill it goes away,,,,always trust your watt meter(s.w.r scale)over the flashing light its really easy to do it beats paying a shop $10-$15

Jan 13, 2013 | Cobra 29 LTD CB Radio

1 Answer

My antenna light stays on even after I have realeased the mike


Try checking the SWR's on channel 1, 20, and 40. The SWR's will change from the low channels to the mid channels to the high channels. The key is to make sure that the SWR's are around 1 or less at all three points. If the light goes out when checking one of them, then the problem is most likely the SWR's. If the light stays on when checking these channels, the issue might still be the SWR's but I would look at the grounding on the antennas. When holding the talk button on the mic and switching from calibrate to swr, can give a false reading. This is due to the calibrate circuit remaining open until you release the talk button. Take the SWR reading by releasing the Talk button on the mic after calibrating then pressing the talk button again after switching back to SWR. This will be the most accurate reading. From everything you described, I would be looking for a grounding problem with the antennas or coax, possibly even a rub though on the coax somewhere in the dash.

Dec 20, 2009 | Cobra 29 WX NW ST 40-Channels Base CB...

2 Answers

Cobra classic 29 ltd


Had fixed the same problem yesterday. My cobra worked when it wanted to, when it didn't it looked like you explained. I found out that on my cobra the blue wire on the mike connector was broken. When it disconnects, no sound. after soldering, everything works fine.

Dec 04, 2008 | Cobra 29 LTD CB Radio

1 Answer

Cobra 29 WX


This "talkback" feature may be due to someone having modified the radio by adding a small resistor between the speaker circuit & circuit ground.Another cause could be the shield lead in the mike plug shorting to the plug itself.

Apr 23, 2008 | Cobra 29 WX NW ST 40-Channels Base CB...

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...

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