no transmit but shows good output

If it has a PA switch on your CB you can plug earphones in the output on the back,, to check your MIC.

In this case sounds like bad mic or mic gain turned down or the audio section of the transmit board is open

Does it have a meter on it? If yes, does the meter move wen you whistle into the microphone? (that is rude on the air but for lack of test equipment..)

Put a small AM radio right near the antenna and talk into the mike. Usually it will accidentally pick up the voice signal and you should hear it. It may squeal if the radio is loud and the mike picks up your signal.

The only thing with saying the finals have blown is that the original poster indicates the meter is still swinging over on tx but nobody hears him. If the finals had blown, I have never known a CB radio yet that still swings the meter on a key, the needle always stays dead or incredibly low once the outputs are shot. CB RADIO INFORMATION I would be concentrating on the antenna side of the equation, providing you even have one ?

With the speaker side down, set the radio on a flat surface. Remove the microphone plug from the radio. Look at the socket the mike plug came out of. You will see a four pin connection. Look closely at the four pins. One of them has a small bump or notch near it. To the left of that notch is the ground pin. To the right of that notch is the receive pin. Above the ground pin is the mike pin. Above the receive pin is the transmit pin.

With the radio turned on and the mike removed, take a small horseshoe shaped piece of wire and touch one end of it to the ground pin and the other end to the transmit pin. This will key the transmitter. If the needle on the meter does not move, you likely have a blown final. If the needle does move, you have a bad microphone or blown audio output IC.

odds are the mic is fine. Mine is, but has the same problem. In my experience, it's much more likely that the finals have blown and need to be replaced. Any competent CB shop can do this in a matter of minutes. If you are even moderately competent with a soldering iron, you can do it yourself.

Sounds like your radio is off frequency. Try changing channels on the radio you are transmitting on and leave the receiving radio on the previous frequency.

Kinda vague here Eric. Can you be more specific? What model of uniden and what manufacturer of antenna?

And, what are you refering to when you broadcast at under 2? Meanwhile, check your mic connection and your antenna connection, also your power to the radio connection. Be sure your antenna cable is not pinched or cut. Is the antenna adjustable?

OK. Your match sounds good. Does the radio indicate that it is broadcasting at full rate, does the needle or leds show positive gain? Of course a good way to test this is with another radio or walkie talkie.

You need a new mic and also a new antenna.

Broken coax near the base usually indicates a stress fracture. Likely caused when the cable was bent in cold weather.

Definitely try another antenna before you do an un-needed repair on your radio. If that doesn’t work, try a different microphone. In the event that neither solution works, your radio may need repair. Also, check that SWR.

Cobra 29 plus will not transmit. changed the final and driver. still will not transmit

Might very well be that the transmission Crystal has been below due to bad Ssw or bad earth / ground etc need to replace another 27mhz crystal.

Try another CB mic just had same problem turns out my Astatic mic went

Cobra 29 LTD dead Keying with out a mic hooked up to the radio so how do I fix it from dead keying constantly need to stop dead keying without a microphone please tell me

Cobra 29 LTD Chrome constantly dead keying without a microphone need to be fixed can you help me please