Question about Cobra 29 LTD CB Radio

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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

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  • Jeffrey Maglothin Jan 15, 2013

    The red light come on when I key it up! I'm getting no sound static or anything!

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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

Posted on Jan 20, 2013

  • jonathanc389
    jonathanc389 Jan 20, 2013

    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

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If you have had anything done to your radio, your built in meter is not accurate. use and external meter for best results. when all is set up right then if your ant. light is still coming on, adjust vr6.

Posted on Jul 21, 2013

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  • Expert
  • 98 Answers

Yes I had a bigmod Cobra 29Ltd one time and its redlight came on but was a great talker. It had upper channels installed(talked from Ky to Oklahoma 1200 miles on SSB upper) Wished I kept it let it go for $50.

Posted on Mar 24, 2013

  • Steve Tompkins
    Steve Tompkins Jul 22, 2013

    Its just that the power level is double by changing the final to C1969
    and a 45 watt output. The light means nothing i unhooked the red wire to light and it had Swr of 1.2 no matter what light says.The Vr can be cooked at high voltage output and the red light will come on. It talks like a son of gun. I had one once an dgot rid of it . Fully modified with big super sound mod& echo.

  • Jim Verge
    Jim Verge Jun 13, 2014

    Steve, Cobra 29's don't have SSB. uppers and SSB aren't the same thing. So upper sideband isn't the same thing as upper channels. Not trying to be a wiseguy. Just trying to help.

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Posted on Jan 02, 2017

wyoed1
  • 211 Answers

SOURCE: antenna light still on

The antenna warning light on the Cobra 29 LTD has a pot ( varabile resistor ) that sets the senativity of the light coming on. If you open the radio, you'le see the pot at the back of the radio. It's the last pot in the rear of the chassis Simply turn it more torward the center of the setting ( anyplace is ok as it means nothing to the preformance of the radio ). The light won't come on unless the SWR's are high. Good Luck and if I can help more, you can email me at this address or at my email address wyoed1@aol.com.
Ed
NC Electronic
Mills, Wyoming

Posted on Jan 07, 2008

  • 39 Answers

SOURCE: I installed a browning br-51 cb antenna on my cb radio.

You need to shorten the antenna,adjust the whip all the way down and see what you have and then cut off 1/4" at a time remember this low on 1 high on 40 it needs to be lengthened high on 1 low on 40 it needs to be shortened . I hope this helps and good luck.

Posted on Apr 12, 2009

audio20
  • 22 Answers

SOURCE: swr meter not moving.

If the radio is working don't worry about the meter unless you absolutely want it. These little meters are not very accurate or reliable. Get an external SWR meter to check the antenna.

Posted on Apr 23, 2009

  • 1 Answer

SOURCE: when i key up the mike the tx/rx light and the ant

your swr setting are off wack fix your swr

Posted on Oct 09, 2009

  • 1274 Answers

SOURCE: Red RX/TX and red ANT light on my CB

Well,first hand ,some cobra radio,s have red some have green RX/TX lights, but are you modulating? Some green lights turn red. What is your standing Wave on the antenna,s? You need to check it and the output of the radio. To do this you need a watt or field strenth meter. Can get one at Radio Shack. Your standing Wave is ok as long as it is below a 2. That has to be done on the antenna. ..hope this helps...

Posted on Mar 12, 2010

Testimonial: "Thx the rx/tx light is supposed to turn red I found out. Still trying to get the antenna prob fixed though."

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1 Answer

My connex cx3300hp wont transmit


You need external watt meter& SWR meter..Change antenna..Is the radio meter keying 3/4 way up to 4 watts?(if not then its not Tx'ng)It could be 10.240 mhz crystal or IF pots(need Frequency counter) Or take it to professional Cb repairmen...

Mar 12, 2013 | Radio Communications

1 Answer

Red lights come on ex and antenna come on when I key up the cb radio and the awe meter doesn't move


Sounds like high swr. If using a mag mount antenna; check for a proper ground by cleaning the antenna base and the place where you put the antenna. Any other antenna; check the place where the whip goes into the coil at base of the antenna. Make sure that antenna has good ground. Check continuity of the pl259. Make sure there is a good connection and no opens or shorts. Hope it helps.
Tom

Jan 13, 2013 | Cobra 29 LTD CB Radio

1 Answer

Just bought a cobra ltd crome ive mounted every thing how to i clibrate it with my attenna? when i key up both rx/tx and ant lights up red?????


This is a common misunderstanding when it comes to communications equipment. You don't tune the antenna to the radio, but rather you tune the antenna to the vehicle. the vehicle is the ground plane for your antenna system.

With that said You will need an SWR Meter between your antenna and Radio. follow the instructions for your meter for calibrating the meter and follow the instructions for your antenna for adjusting the length.

Jul 14, 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

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

1 Answer

Red RX/TX and red ANT light on my CB


Well,first hand ,some cobra radio,s have red some have green RX/TX lights, but are you modulating? Some green lights turn red. What is your standing Wave on the antenna,s? You need to check it and the output of the radio. To do this you need a watt or field strenth meter. Can get one at Radio Shack. Your standing Wave is ok as long as it is below a 2. That has to be done on the antenna. ..hope this helps...

Mar 11, 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

1 Answer

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

1 Answer

Cobra 29LTD CHROME low tx no mod, rx good low Vol, talkback good


1 why would you change the finals?? Have you checked you antenna? How are your SWR's? Crappy antenna's cause a lot of problems.

Use an external meter to see what the SWR is, and see what the output is PEP. If its low, then there is something wrong. If it is High, change the mic and turn up the dynamic all the way.

Next. Have you been messing around in there?? Tryin to get more wattage? You turned VR4? If you thought you were turning it up by turning it all the way to the right, you turned it all the way down. Turn it all the way to the left.

Jun 05, 2009 | Cobra 29 LTD CB Radio

2 Answers

Swr meter not moving.


If the radio is working don't worry about the meter unless you absolutely want it. These little meters are not very accurate or reliable. Get an external SWR meter to check the antenna.

Apr 15, 2009 | Cobra 29 LTD CB Radio

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