Squelch doesnt work

Make sure it is not on PA, if there is absolutely not a setting issue, then the unit is new you need to take it or send it back.

You are at a point where you should send it to a shop. That's the best advice I can give you.

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vr1 "s" 9 setting on the tx meter vr2 voltage setting vr3 squelch vr4 amc vr5 p4 display on tx signal meter.

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.

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

check the squelch by turning all the way both ways. check the external speaker socket. if it is the swicthing type it could be either bad conntact or dry joints. try an external speaker to see if that works. another thing is I believe it wont work if the microphone is not pluged in or connection fault there. Good luck.

Is the antenna plugged in?
Is the antenna propperly checked with an SWR meter?
Have you tried turning the squelch back? (squelch on)
Have you check the microphone connections? (is the microphone dodgy?)

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.

Check D23 and D28. They are polarity protection diodes. It could also be the power knob.