Question about Uniden Radio Communications

1 Answer

I have a cobra 135 base radio. It powers up and

I have a cobra 135 base radio. It powers up and and lights up. It was working fine. Now i can't hear anybody and they can't hear me. I have no sound. I checked the speaker and got it on a good antanna.

Posted by on

Ad

1 Answer

  • 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.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 494 Answers

It is possible the audio amp has failed. If I remember this radio it uses two push pull transistors for the audio amp. Check the mic connector as it may have a broken wire and that can cause a disconnection both ways. Lastly the radio uses a relay to switch from receive to transmit and the contacts can get dirty with age and this rig is getting old! This relay can be cleaned but use the striking surface from a book of matches as the points are silver or an alloy a palladium and can be damaged if cleaned improperly.

Posted on Feb 13, 2010

Testimonial: "good advice "

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

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

Hi,
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.
New users get to try the service completely Free afterwhich it costs $6 per call 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.
Goodluck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

No rf signal.


try it on a base station antenna and see if it still happens. If it does it should be under warrenty so send it back and get another .

Apr 08, 2014 | Cobra 29 LTD CB Radio

1 Answer

I have an old cobra hooked up worked fine the the


Sounds like you could have a bad soilder joint in the radio. If you hit the top or bottom of the radio does it help? If so its soilder. You match your antenna to your truck not the radio. You might want to recheck it.

Jul 18, 2010 | Cobra 148 GTL 120-Channels Base CB Radio

1 Answer

Breaks up on high power but talks fine on low


sounds like the dead key might be set to high on the high side and you're not gettin any swing.

May 31, 2010 | Cobra 150 GTL DX Base CB Radio

1 Answer

Cobra 18 wx st for mobile use, ned to switch reg mic for cherokee power mic. need mic diagram for the four pin


You probably don't want to hear this, but the cobra 18 wx st is just about the worst, and most hated radio ever made. Its a very poor radio.

to be very honest with you, you should get rid of that radio, or return it. Then buy a cobra 29 instead,

for proper mic wiring, please reference this page.

Jan 03, 2010 | Cobra 18 WX ST 40-Channels Base CB Radio

1 Answer

Af audio power amp


Just because the chip is warm doesn't mean it's bad, especially if it seems to work fine otherwise. Do however make sure that the device is properly heatsinked, and inspect the work done in the process of any modifications. If for some reason the device is self-oscillating it could do so at a frequency above hearing thereby going unnoticed. That will cause the device to overheat, and also make modulation weak and the RF to splatter out of band. You'll have lots of power on the RF wattmeter, but people can barely hear you if that's the case.

May 29, 2009 | Cobra 25 LTD 40-Channels Base CB Radio

1 Answer

Low transmitting range on Cobra MRF55


Hi dstrand, sorry you are having a problem. I will need some more info if you can. Is this radio in a base situation or mobile? Have you had any work don recently? Have you changed anything on the system? (Microphone, antenna, coax, etc)

Haave you checked your swr recently/ If yes, did you use a seperate meter or did you use one built in the radio?

Hope to hear from you soon.

Tom

Dec 30, 2008 | Cobra MR- F55 Base CB Radio

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

2 Answers

Codra 29 nw ltd classic


For the money,the Cobra 29 nw/st is just as good if not better than a Galaxy. Cobra is more durable by far. I have had 3 of these cobra's in the last 30 years. Only had to replace the last one because the tractor got hit by lightning.
Sure would not pay big money for a name.

Mar 19, 2008 | Cobra 29 WX NW ST 40-Channels Base CB...

1 Answer

Cobra 29GTL Won't Transmit


if the red ant light comes on this means that you have antenna trouble either in the antenna itself or the coax but this should not have anything to do with the radio not transmitting. it sounds to me that you have a bad audio chip or a bad power output transistor. in either case you should really take it to a cb shop and let the professionals solve your problem, good luck!!

Aug 16, 2007 | Cobra 148 GTL 120-Channels Base CB Radio

Not finding what you are looking for?
Radio Communications Logo

Related Topics:

209 people viewed this question

Ask a Question

Usually answered in minutes!

Top Uniden Radio Communications Experts

Jason

Level 2 Expert

211 Answers

John
John

Level 2 Expert

509 Answers

AnyMHz.com
AnyMHz.com

Level 2 Expert

500 Answers

Are you an Uniden Radio Communication Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...