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

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No Sound I cant get any sound out of My CB the ext spkr works on another radio. I turn the squelch all the way and still nothing. please help as i have three of these sitting in my basement and am wonderinf if i just throw them out.

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Re: No Sound

There is a capacitor in series with the o/p pin of audio IC that goes O/C giving no audio out . The value is about 220u/F and replacement should be 25v rating. Before this is tried measure the voltage on the o/p pin it should be about 6-7 volts and if very high or low the i/c itself is dud. BOB

Posted on Apr 19, 2007

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No squelch/sound

turn squelch all the way to left and leave it there RF gain should be all the way to the right.Radio should be in CB not Pa mode

Mar 26, 2014 | Cobra 29 LTD CB Radio

2 Answers

When I turn my cobra 29wxst on, I hear chatter (ppl talking) for a split second then nothing. When i key up, nothing, no swing or anything. However, i get weather. All the basics are covered, coax, ant,...

You've probably already done this, but make sure all the basic settings are correct. CB-PA switch is in CB mode, Squelch is turned to the left, RF Gain is turned to the right, etc. After all that, and you still have nothing, I would try using another microphone. If you have a spare mic or a friend with a spare mic, borrow it. Just make sure its wired the same as yours is. (If it's a cobra 4-pin, it most likely will work.)
Now if that doesn't fix it, then the most likely problem is in the MIC/AUDIO circuit. You'll need someone with experience to replace the necessary parts.
In radio troubleshooting, always start with the basics:
Correct Connections
Proper input Voltage (Power)
Correct Settings (Vol, Sql, RF-G, etc)
Antenna (properly matched)
I hope this helps a little...

Mar 20, 2013 | CB Radios

1 Answer

My Ranger2950 has no sound??

Have a look here for info about the Ranger 2950. This is an Amateur 10 & 12 meter transceiver that enjoy some popularity due to its ability to be modified to work on the 27Mhz Citizens Band.

Make sure the Mode is set to something other than PA. A few of the first things that come to mind is the Volume, Squelch & RF Gain settings. The Volume is straight forward - choose a setting in the middle to begin. Next, set the squelch. Most radios have the squelch open when set fully counter-clockwise. As you move the squelch to this position, sound should be heard from the speaker if a signal is present. As long as there is an antenna connected, the radio should "hear" noise. If you do not hear anything, leave the Squelch fully CCW and try varying the RF Gain fully in one direction. If you still hear nothing, set the Squelch to the fully clock-wise position. Adjust the RF Gain to the opposite direction. At this point, you should have heard something - even if just static hash. If not, the volume control may be dirty. Disconnect power and rotate the volume control back and forth several times to dislodge any dirt on the volume wiper inside the radio, and try again.

Make sure that the Ext Spk jack does not have a plug inserted as it will defeat the internal speaker. Likewise, if using an external speaker, make sure it works.

Good luck!

Nov 19, 2012 | Ranger CB Radios

1 Answer

My cb radio is on but cant hear nothing sound is turn up but nothing come out

You didn't include the make / model CB you have, so I can only offer general suggestions. If these do not work, please provided the missing info.

Start out by locating and setting the the Volume to a position between 1/4 and 1/2 way clockwise, the Squelch to fully counter-clockwise and the "RF Gain" to fully clockwise to "MAX".

Check the position of the "PA / CB" switch and set to CB. When set to PA, both receive and transmit audio is sent directly to an outdoor speaker (instead of through the transmitter and antenna for reception by other radios). The PA speaker is usually connected to a jack at the rear of the radio. When the PA / CB switch is selected, the internal speaker is silenced even if there is no PA speaker connected.

At this point, you should hear static or voices (with an antenna connected). Do not attempt to transmit without a properly tuned antenna connected. If no sound is heard, there's something else wrong.

May 22, 2012 | Uniden Pc 78xl Cb Radio Mobile

1 Answer

My cb will turn on but i cannot talk to anyone, im getting nothing. Why?

Does it Transmit?? Does meter show transmit?? Can you hear?? If its hearing an transmit could be Microphone, or speaker, or other more serious problems inside circuit. Change mics and hook up Ext Spkr. If that does not do it, then radio is gone. Buy new radio instead of repairs.

Apr 09, 2011 | CB Radios

1 Answer

I have a Uniden Pro 510xl, it's about 9 yrs old. I went to use it last week and after turning it on, found that there was no sound, (turned the squelch up) . When I keyed the mic, I saw that I was...

chk mic, lose cable in **** plug test with other mic .. also test with Ext speaker.. do u get any reading on meter / LED display during RX? does PA work? otherwise your sound chip is dead

Dec 30, 2010 | Uniden PRO510XL 40-Channels Base CB Radio

1 Answer

Cobra 29ltd CLassic, TX power and audio is ok, volume from spkr is good, squelch works but no cb recieve.

Try a new Mic. Make sure its a working mic. If you have a bad mic, the receive will not work.

Aug 22, 2010 | Cobra 29 LTD CB Radio

1 Answer

I have a Cobra ltd 25 classic in my pick up. the cb will turn on but i cant get any stacik no matter where i turn the squelch or rf gain. this doesnt seem right because it has never done that before. but...

Does the signal meter show any signal? Try plugging something into and out of the EXT Speaker jack to see if maybe that is preventing the internal speaker from working, or plug in an external speaker or headphone to test it. If the meter shows nothing, I'm concerned about your electronics, especially with the 'squelch' control 'wide-open'. 73's

Aug 13, 2010 | Cobra 25 LTD 40-Channels Base CB Radio

1 Answer

Sound problem

First, is the radio new? As long as the mic, antenna, and coax work properly with another cb radio, I would start with two areas:

1. make usre the PA/CB Switch is set to CB. I have seen many people accidentally bump the switch to PA and not know it. I have done it myself.

2. Turn you Squelch all the way counter-clockwise and your RF Gain clockwise.

If these make no difference, please reply with a comment so we can further assist you.

Feb 01, 2008 | Cobra 25 LTD 40-Channels Base CB Radio

1 Answer

Low sound on incoming

Have you checked your squelch control? try turning it completly counter clockwise this should un-squelch your receiver and increase the sound, however this might also be a sign of poor reception which would indicate a bad anntena, poor grounding or coaxial cable. Check and or replace these items before continuing. If replacing these do not help your situation then the unit itself has a problem. I would suggest that you take it to a radio repair shop and get the work done by a professional, since there are not user serviceable parts in the device.

Aug 31, 2007 | Cobra 148 GTL 120-Channels Base CB Radio

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