Question about Radio Shack TRC-521 CB Radio

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Problem with CB

CB has power, but just makes the static sounds. can't hear talking, don't know it i am being heard. i just hear static. i don't know the model number

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Re: problem with CB

Definitely need more information:

1. Have you checked your coax to make sure it is good (with a meter)? Make sure center pin to center pin has good continuity, and making sure that the center pin to shield is not shorted.

2. Have you made sure your antenna is set up properly, not grounding out to the bracket. Make sure the plastic ferrel is between the antenna and the bracket so it does not ground out.

3. Do you have a good ground plane? Is the antenna bracked making a good groudning connection to the vehicle?

4. Do you have a friend with cb set up in his/her vehicle, so you can test between the two?

Posted on Jan 23, 2008

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When do you know if you have a decent radio

The 29 has a built in SWR meter--check the match to make sure it is below 2 (lower the better).

The radio can be peaked for better than factory audio.

If the squelch is up too high you will not hear people below a certain signal level---in your case set it so you hear who you want to and not jokers.

RF gain lowers signal the radio sees for receive.

The stock mic will work but make your voice somewhat flat sounding---a power mic or having the mod limiter removed will make the radio and your voice louder.

Let me know if questions.

Jun 10, 2012 | Cobra 29 LTD CB Radio

1 Answer

My cobra 29 ltd is in a ford truck with a over head camper. i put a magnet mounted wilson 1000 watt ant (4ft.) on top of the cab. I cannot get any squelch to work I did a radio check i believe i was heard...

Assuming you don't have the manual,basic controls for receive are to make sure the switch next to the meter is set to s/rf,switch for cb/pa is set cb,knob for rf gain is at max, squelch knob is fully counterclockwise..squelch can be adjusted if ya don't want to hear static but will start cutting out weaker signals.If none of the above works,try plugging in an external speaker to the jack on the back of the radio,if ya still don't hear anything,check that antenna coax is screwed in tightly in back of the radio.Next step after all that would be the microphone,is the stock mic,power mic..if it is the original stock mic that has not been rewired in any,then I would suggest taking radio to qualified cb repair shop,bring mic with you to shop so they can check it too,in fact I would bring the truck also so they can check antenna and adjust it if needed...Good luck

Sep 04, 2011 | Cobra 29 LTD CB Radio

1 Answer

Can not get static out of radio i have a cobra 29 with weather channel the squ knob seem 2 b not working sometimes can u help me

Turn the squelch down, and the RF gain all the way up.

You need to realize that some times, there is not a lot of noise out there. Right now lately there has been due to skip. But it does die down. When you hear a lot of noise for a while, then it goes away, it messes with your head. You don't hear anything, but that's because its quite out. I would test it by talking to some one on the radio. If you can hear them just fine even though you don't hear a lot of static, then its just quiet out.

Jul 23, 2011 | Cobra 29 WX NW ST 40-Channels Base CB...

1 Answer

Cb puts out good sound but when someone try to talk to me it all you hear is static

same thing sometimes happens to me. Usually it is because the person who is talking to you might have a weaker antenna. Sometimes people put a very strong transmitter with them and talk to people but you cant talk back.
So really they can't hear you good either. Just because you are too far away.

Jan 11, 2011 | Cobra 29 LTD CB Radio

1 Answer

When we push the button to talk, we get a low frequency squeal, and the other CB radios receive a squeal. We have tried adjusting the sqelch, no fix. It seems to disappear sometimes when you turn it on and...

Hi,my name is John. Welcome to FixYa. Do you hear voice in radio? May be to close to each other. Let me know how it goes. Good luck and thanks for Choosing FixYa ..John sounds like feed back from speaker.

Nov 06, 2010 | Cobra Road Trip 40-Channels Handheld CB...

1 Answer

A Midland 1001z with a 103 whip ant. They are both NEW. When I turned on the radio all I heard was like the power sound but no volume! I even tried a exturnal speaker! Nothing! Any IDEA's????

Is the mic good? If there is a problem with the mic, it will not put the radio into receive mode and you will hear nothing.

Also make sure the radio is not on PA mode, or make sure the squelch isn't too high.

there are also times when it is really quiet on the radio and you won't hear any static. keep this in mind.

Sep 26, 2010 | Midland 1001Z 40-Channels Base CB Radio

1 Answer

Ref. Cobra 29 Radio: Can talk out and be heard but when someone is talking to me, sometimes I cannot hear them or it has a lot of static. Have tried everything. Please make suggestion.

HI, my name is John. Try putting the RF GAIN to MAX,also the squelch, check the antenna connections, have someone check your SWR, they can do it at Radio Shack for free, or a CB shack. If that does not help, let me know and we will go further with it....hope this was helpful...oh, and turn on the NB or the NBL switch..

Sep 02, 2010 | Cobra 29 LTD CB Radio

1 Answer

I am looking to buy either a dx48t or dx95t

both are hi powered,approx 140 to 150 watts, radios that need about 14 amps of power to be safe,watts divided by volts=amps needed.if you want to plug and talk i suggest something 80 watts or less.

Oct 04, 2009 | Galaxy Radios DX-95T Base CB Radio

2 Answers


git a good grond on it or it will go sky hi

Dec 05, 2007 | Cobra 148 GTL 120-Channels Base CB Radio

1 Answer

I can't hear through my internal or external cb speaker

Can you hear static when the squelch is at minimum ?. If you can hear static then tere is nothing wrong with the audio system. If you are sure about the squelch, connect goosd speaker directly to the 2 wires coming from the main board bypassing the speker jack. if there is still no sound then the audio amp chip is defective. The audio amp can only be damaged if the output is shorted for a long period of time.

Mar 02, 2007 | Uniden PC78ELITE 40-Channels Base CB Radio

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