Question about Cobra 29 LTD CB Radio

1 Answer

Blown finals - Cobra 29 LTD CB Radio

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert who has answered 1,000 questions.

  • Master
  • 1,274 Answers

Hi, my name John. I don't know what finals your are asking about, do you you need to replace them, are you going to do the work your self ? There are several .RF, RX, AUDIO, PRE-DRIVER, I will help you, just narrow it down to what you need to replace. I will post the tools and what you need to do the job........hope this was helpful..Rate this solution on the four thumbs-up....I will post it here.... .John

Posted on Sep 11, 2010

  • Martin Manley
    Martin Manley Jun 13, 2014

    cobra 29 lx blown finals, will do work myself but need more info like part associated with finals and any info about repair. never repaired cb, only computers. thnx

  • Martin Manley
    Martin Manley Jun 13, 2014

    my radio is a cobra 29 lx not 29 ltd


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that 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.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

No power fuse blown replaced fuse new fuse blown

It shows that there is shorting in the further circuit,check MOV (metal oxide varistor) used for protection in the mains supply,MOV is mounted parallel to the main input supply,if o.k check further bridge rectifier and finally switching device used for SMPS power supply either transistor or STR by replacing the same.

Feb 04, 2011 | Emerson TS1997 19" TV

2 Answers

Trips on power up

It has a short circuit on the final steps of the outputs, maybe the common called "final transistors or power amplification IC (integrated Circuits)"are blown. You don't have the ability to resolve this problem, so take the unit to a facility authorized repair.

Dec 29, 2009 | Behringer EUROPOWER EP2500 Amplifier

2 Answers

My cobra 29ltd cb radio will power on and recieve but will not transmitt. the transmitt light lights up but the meter will not move. what can I check?

I am assuming you have called out for a radio check and not gotten a reply, or even better tested it with friends radio. Just because the meter doesn't mover doesn't mean that its not transmitting.

So as long as you tested it with another radio, and it is not transmitting it could be any number of things. If you have never had antenna tuned so the swr is low, or your swr was high for a long time, your final transistor is most likely blown.

TX switching transistor could be blown, trace could be gummed up.

If your ant light is coming on, the is a problem with your antenna. Could be disconnected, and that can lead to a blown final.

At any rate, your problem most likely requires a tech. Take it to a repair shop.

Sep 27, 2009 | Cobra 29 LTD CB Radio

1 Answer

Blown fuse, i think

pull one fuse at a time check to see if its blown,continue until you find the blown one(hold fuses to a light to see if the wire in fuse is seperated.)

Jun 11, 2009 | Sport & Outdoor - Others

1 Answer

Static is coming out of one of the speakers

Loose conection, short in wire, or blown speaker. Check the connection then follow the line to the speaker looking for flaws. finally if you can touch the speaker press it softly. Not in the middle. If it is scratchy it is blown.

Mar 14, 2009 | Bose 3 2 1 GSX System

1 Answer

I have sound but no tsmt,the tsmt light does comes on,no output

well that leaves 2 mor parts the transmit final and the current resistor these have straight 12 volts applied when the radio is turned on . if you look at the final it will be burnt or blown apart on the heat sink. replace them and you shoul be up and talking again.

Mar 08, 2009 | Uniden Bearcat Pro PC68LTW 40-Channels...

1 Answer

No transmit after blown final was replaced.

I tried to answer this the first time you posted :). If the finals got burned that bad I found that the bias resistor sometimes will get a burned foil and not make good connection. Also 1/10 watt sounds like the driver isn't amplifying from the buffer. Might want to check for burns on the foil all around the final stages, including where the antenna connector mounts to the board. Don't believe the caps are blown but as a last resort.... Its really hard to troubleshoot without the radio on the bench . Good luck.

Feb 04, 2009 | Magnum Minimag Base CB Radio

1 Answer

No receive cobra 29 ltd classic

Hi and welcome to FixYa,

Initially, pls confirm that there is modulation (transmit audio). The reason I asked is if IC4 (TA7222P) is blown, then the radio would have no audio amplifier which would explain no receive audio. Additionally, the final and pre-final (TR15 & 15) gets is modulated TX+12 through D8 from T1 which in turn is the output of IC4 through C48.

Perhaps a schematic diagram may be of further help.

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

Dec 18, 2008 | Cobra 29 LTD CB Radio

1 Answer


if you can identify whats blown what ic or pcb board. you can get it replaced through yamaha. or many other various used reciever parts lists online. If you wanted to identify the transistor thats blown find it online and just resolder that one you could do that. But id say try and look into a replacement of the board. if you shorted the poles, then there will be a lot more damage on that channel then the amps final maximizer, or amp as you refer to it. -Thanks Nate

May 17, 2008 | Yamaha RX-V800 Receiver

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

Related Topics:

457 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cobra Radio Communications Experts

Level 2 Expert

500 Answers


Level 3 Expert

3287 Answers

Brad Brown

Level 3 Expert

15557 Answers

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

Answer questions

Manuals & User Guides