Question about Cobra 29 WX NW ST 40-Channels Base CB Radio

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Cant talk through mic

When i attemp to talk through mic all i get is a loud contining whistle sound, and no on else can hear me. Also i cant hear no one else.

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Re: cant talk through mic

Sounds like a bad or miswired mic. Try a new mic ( use the proper cobra mic ). If the problem still continues, check all the swiches on the front of the radio and make sure you don't have any cold solder joints ( broken lead to board connections ). Good Luck
NC Electronic
Mills, Wyoming

Posted on Jan 07, 2008

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1 Answer

I have a cx-366ce cb cannot hear talking what is wrong

Is squelch turned too high that it is blocking too many signals?
Otherwise, it could be a faulty cable on the mic as the PTT button disconnects the speaker on the CB and a broken wire can cause the speaker to be disconnected.

Jun 28, 2014 | Connex Cx-366ce Night Runner 40ch Cb...

1 Answer

Microphone problem


I might be wrong, but a wiring problem sounds like the culprit here.

Where the mic connects to the PCB, inside the radio, something has come adrift, the fact that your keying is getting through means something is loose, open it up and have a good look at the connections, if you find the culprit, fix it with solder, but be very sparing and careful, you don' t want solder all over the area, else you'l stuff up the mic input completely.

I hope I'm right, and I hope this helps you fix it.


Aug 15, 2012 | Uniden PC68XL - CB radio - 40-channel -...

1 Answer

I have a 3300 hp when i key up and start talking the sound shuts off on my end the needle still moves and people can hear me then when they talk back i cant hear them the radio is recieving and in order...

Keeping it simple first

1. Try another mic it could be a short at mic plug/cord
2. Plug in an external speaker or check internal speader wires for short

You refer to it as a Base so i would assume you are not mobile. Vibration in a vehicle can be devastating to solder trace side of radio pcboard.

Jul 02, 2011 | Connex 3300 240-Channels Base CB Radio

1 Answer

I have my radio hooked up in my jeep and i can hear other people talk but it seems that they cant hear me talking. Its all hooked up right. i checked to see if there was a tuning thing on it and there...

Turn up "MIC GAIN" also check and see if it keys up full scale 4 watts on output meter. If that doesn't do it change MICS. Go for a power mic by cobra that runs off say a double AA battery. It may be conditions also or your out of range of persons. check Antenna,Swr reads (should be 1.1 to 1.5)on a Radio Shack meter. Try it all.

Jun 11, 2011 | Cobra 19 DX IV CB Radio

1 Answer

Radio just makes whistle sound doesnt matter if mic hooked up or not same with antenna,worked great when bought lasted 2 days had fixed 2 days again had fixed again worked 1 day as soon as you turn on...

What type of power source is it hooked to? straight to car battery or some other power source? Sometimes cart alternator noise is picked up by radios. Try hooking the power source up differently

Mar 19, 2011 | Connex CB Radios

1 Answer

When i talk people they can hear me but i cant hear them talk back to me

Turn up your RF gain. If that isn't the issue, then the mic may be damaged. Try a new mic.

Jan 09, 2011 | Uniden GRANTLT 40-Channels Base CB Radio

1 Answer

When I depress the transmit button the cb puts a squel out to other radios on the same channel yet I have no problem hearing transmissions from the other radios

It sounds like the mic either has a problem, or its wired incorrectly for that radio.

Try a new mic, and make sure it's wired for that radio.

Also, if you have talk back then it's too loud, or your mic gain is too high.

The type of radio would help me know weather or not it could be the mic wiring.

Oct 20, 2010 | CB Radios

1 Answer

My radio recieves ok but only whistles when i key the mike is this a major fix?

Do you have talkback installed? It my be too loud and causing feed back. Back the mic gain down if so.

Could also be improper mic wiring. If you use a mic that is wired for a different radio, it could just cause a hum, buzz or squeal.

Another thing that can cause a hum, buzz or squeal is a faulty volume and or squelch knob depending on the radio.

  • Turn down or disable talk back.
  • If you cannot turn off or disable talk back, lower mic gain.
  • Try a different mic that you know is wired for cobra.
  • Play with volume and squelch knobs while TX and see if it stops at all. If it does replace knob.

Oct 12, 2010 | Cobra 150 GTL DX Base CB Radio

2 Answers

My talk back is low cant hear it

You really don't want to have a loud talk back. Its usually controlled by your mic gain. the louder it is, the louder your talk back is.

Talk back is used so you can her how your audio is being transmitted. It makes a lot of sense when you have echo. use it to hear you echo to make sure its not too much.

The problem with a loud talkback is, if it is too high, you will get feed back in your transmit.

You should leave it where it is.

Jul 13, 2009 | Magnum S6 Base CB Radio

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