Question about Cobra 29 LTD CB Radio

2 Answers

I have a cobra 29 classic ltd black and chrome bt edition, no matter what antenna i use or how low my swr is i still receive nothing but static all day on all 40 channels. i can transmit just fine but my receive or comeback is always faint and garbled or nothing at all, or i just dont hear anything at all when i know there is chatter on the radio, what can i do to solve this or pinpoint the problem

Posted by on

Ad

2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Genius:

    An expert who has answered 1,000 questions.

  • Cobra Master
  • 1,847 Answers

You have the squelch turned all the way to the left am I correct? First of all there are not a whole people using the radio today and those that are are probably no where near you therefore when your radio is on all you will recieve is static and a whole lot of ground noise .Now to eliminate this change your ground to a better location using a multimeter from your antenna to where you ground it .

Posted on Aug 03, 2016

Ad

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 6,771 Answers

The problem may be in the audio output chip mounted on the chassis, also! there is also a small capacitor located next to the audio chip that has known to be a problem, finally sub the speaker for another, often a source of trouble.

Posted on Aug 31, 2012

Ad

6 Suggested Answers

6ya6ya

6ya staff

  • 2 Answers

SOURCE:

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Anonymous

  • 3 Answers

SOURCE: 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

Posted on Dec 24, 2008

Anonymous

  • 2 Answers

SOURCE: 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.

Posted on Jan 06, 2009

Anonymous

  • 1 Answer

SOURCE: Cobra 29 LTD Classic not transmitting or receiving

As I understand from a tech friend of mine, most truck beds are not grounded well enough. Perhaps you could borrow/purchase a magnet mount antenna and locate it on the roof, for testing. Then you would have it narrowed down to the location.

Posted on Jan 07, 2009

Don Reiman

  • 773 Answers

SOURCE: cobra 29 ltd classic antenna calibration ??

Wow. That's not at all a solution to what this guy is asking. And why all the caps??

The one point jm77437 has that is correct is that you do not set the radio, you set the antenna. The rest is blah blah.

Here is how you tune your antenna for you radio. First off it depends on what kind of antenna you have. most fiberglass antennas have a tunable tip to adjust the height of the antenna. Metal whips either have a collar at the base that the whip will either slide up or down in to adjust the height. The other type of metal whip's you have to physically clip to shorten the antenna, you must be careful with this type because once its clipped, that's it. You cannot add what you cut off.

I am going to give this example using a metal whip with an adjustable collar.

First after your radio is hooked up in the vehicle, drive to an open lot. Buildings and other structures can cause extra reflection. turn to channel 1. Flip the meter to CAL. Key the mic without talking. Now turn the CAL knob up until the needle reaches the little upside down triangle all the way to the right marked CAL. Now you have just celebrated your radio for your setup to measure you SWR. Now while still holding the key, flip the meter switch to SWR. The needle will move, and where it stops is your SWR reading. The lower the better. Anything under 1.5 is considered really good. But still, the lower the better.

Make note of what your SWR was on ch 1.

Now flip to channel 40. Repeat the SWR process. You must recalabrate each time you take a reading.

Now like jm77437 said. If your SWR reading is higher on 40 then 1, then your antenna is too long, and you must make it shorter. Loosen the collar and lower the antenna in the collar 1/4 inch at a time. check the swr each time you adjust the antenna.

If your SWR reading is higher on channel 1, then your antenna is too short. You must make your antenna longer. Do this by loossening the collar and pulling the antenna upward in the collar 1/4 inch at a time, again checking the swr each time you adjust the antenna.

What you want to achieve is having the same SWR reading on channel 1 and 40. then you have the best match you are going to get with that antenna.

If your swr is under 1.5 on all channels, you don't need to fuss unless you are a perfectionist. then by all means go ahead.

If your reading is higher then 3, or your ant light comes on, something is really wrong. Make sure your antenna is connected all the way, and the coax is not damaged.

Its important to have an appropriate SWR because if you do not, you are reflecting too much signal back into the radio, and eventually you will burn out your final transistor, and your radio will be toast.

Some tips: make sure you check the swr with the doors and windows shut. Make sure you are in an open lot. Remember to calabrate ecah time you take a reading. If you have had your radio peaked by a radio shop, and they have lowered your dead key, or have done a swing modification, then the meter in your radio will not work when taking an SWR reading and you will have to use an external meter.

Posted on Apr 24, 2009

Don Reiman

  • 773 Answers

SOURCE: cobra 29 ltd classic antenna calibration ??

You should not calibrate the antenna before you install it on the car!! the antenna needs to be calibrated on the vehicle that it is going to be on. Type of vehicle, different mounts, and many other variables can change the amount of reflection you will get.

j0hn9999 did a much better job but left some info out.

Take your SWR readings on channel 1, then on channel 40.... NOW, if your SWR is higher on ch 40 then ch 1, then your antenna is too long and it needs to be shortened. Refer to the antenna instructions on how to shorten the antenna.

If your SWR is higher on ch 1 then on ch 40 then your antenna is too short. You must lengthen the antenna. Again refer to your antenna instructions on how to lengthen your antenna.

You must calibrate each time you take a reading.

Make sure your doors and windows are shut when taking a reading

Make sure you are in an open lot when taking a reading as buildings, trees and other structures can cause reflection and give you an inaccurate reading.

If you adjust the length of your antenna on another vehicle and then put it on yours, the SWR will be off. It will need to be tuned again.

An external meter is better then the one in the radio, but will need to be hooked up in the vehicle you have the antenna on.

If you are not running any kind of power, or do not have a swing kit installed, and the radio is stock, the meter in the radio is more then enough to get a correct SWR reading.

Posted on Apr 24, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

I have had a Cobre 29 LTD Classic, a 29 NW LTD Classic and now a 29 LTD Chrome.It seems that the first two died because of possible bad antenna connections. I was able to calibrate the radios and adjust...


I see two possible problems. First, with a magnetic antenna it is difficult to get the proper ground for the antenna. Make sure the magnetic base is clean as well as where you place it. Second, try running your power lead DIRECTLY to the battery and not using the cigarette lighter. Hope it helps.
Tom

Feb 27, 2013 | Cobra 29 LTD CB Radio

1 Answer

I have had a Cobre 29 LTD Classic, a 29 NW LTD Classic and now a 29 LTD Chrome.It seems that the first two died because of possible bad antenna connections. I was able to calibrate the radios and adjust...


HELLO STAN FIRST HAS THE RADIO BEEN PEAKED AND TUNED? SECOND IS THE INTERIOR LIGHT IN YOUR PICK UP RIGHT BELOW YOUR ANTENNA,IF SO YOU HAVE A PROBLEM BUT EASY FIX THE WIRING GOING TO THE LIGHT ACTS LIKE AN EXTRA ANTENNA CAUSING YOUR ANTENNA TO RESONATE TO YOUR RADIO CAUSING THE A W I LIGHT TO COME ON MOVE YOU ANTENNA BACK A LITTLE FUTHER AND SHOULD BE GOODif you want to get a bettter antenna get a willson 500 mag mount far better

Feb 27, 2013 | Cobra 29 LTD CB Radio

1 Answer

Cobra 29 lx bt antenna fail light coming on


You must set the SWR on your Antenna. There is a little more than just pluggin it in. What type of antenna do you have?

Feb 05, 2013 | Cobra 29 LTD CB Radio

2 Answers

How to match a antenna to a cobra 29 LTD Classic


You are actually tuning the antenna to the vehicle it is mounted on here are some very good resources. http://www.rightchannelradios.com/pages/cb-antenna-tuning-guide-pv-c0-61.htmlhttp://www.wilsonantenna.com/swr.php

Be aware that if your radio has been modified it may produce a dirt signal that an swr meter may read as reflected power. In this case it may be more accurate set with a unmodified radio also if your radio is setup for a linear it may have a deadkey to low for the swr meter to calibrate correctly.
Hope this was of help.

Nov 26, 2011 | Cobra 29 LTD CB Radio

1 Answer

I want to calibrate my cobra 29 NW Ltd. Classic


Calibrate For SWR (Standing Wave Ratio) http://www.cbtricks.com/radios/cobra/29ltd_bt/graphics/cobra_29ltd_bt_om.pdf
The CAL is only to calibrate meter for a swr check of you antenna system it does not calibrate radio.

Jan 11, 2011 | Cobra 29 LTD CB Radio

1 Answer

I have had a Cobra 29 BT installed and my reception is nothing but loud static only when moving. It is a 2010 Freightliner and SWR is consistently high at about 3.0. Is this a coax or antenna problem?


Hi,my name is John. Welcome to FixYa. It could be both. Try running your unit direct from or to the battery, bi-passing all ignition noise. Make sure your antenna is getting a good ground, have your SWR checked at a near-by CB shack, or Radio Shack all for free. Thanks for choosing FixYa....John

Nov 16, 2010 | Cobra 29 LTD CB Radio

2 Answers

I have a Cobra 29 LTD with Bluetooth. I have no static no matter where I set my squelch and RF gain unless my noise blocker is off. Both my rx/tx and antenna lights turn red when mic is keyed. I have try...


if the antenna warning indicator is lighting during transmission then the antenna is either located and.or installed improperly or a defect exists in the antenna mount or the feedline itself, including connectors.

Jun 08, 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

Cobra 29 ltd when powered up error Y can anyone help me


Hi and welcome to FixYa,

Often an error code "Y" would indicate test/diagnostic result of the antenna. A communication equipment thus equipped would test the SWR and display this error code if:
  • no antenna detected; or
  • SWR of antenna is way too high.
Although am not familiar with the version of a Cobra 29LTD with this type of display. Could you pls post back the exact model of the radio, normally there would be two (2) more letters after the LTD something like Cobra 29LTD BT.

Good luck and Thank you for using FixYa. Happy Holidays.

Dec 19, 2008 | Cobra 29 LTD CB Radio

Not finding what you are looking for?
Cobra 29 LTD CB Radio Logo

323 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cobra Radio Communications Experts

Brad Brown

Level 3 Expert

18121 Answers

Chris

Level 2 Expert

197 Answers

Marvin
Marvin

Level 3 Expert

85216 Answers

Are you a Cobra Radio Communication Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...