Question about Cobra 25 LTD 40-Channels Base CB Radio

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My cobra 25ltd is not transmiting ,can you help me? i bought used he said it had a connex echo board in it ,i can receive ,when i talk on it no one can hear me ,thank you so much for your time ,its not a base unit.

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I would look into replacing the antenna, that is what sends and receives the signals .

Posted on Sep 05, 2009

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1 Answer

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to much to explain . Take it to a tech and have him give you a quote as to how much to fix it and then go buy a new one .

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I have cobra 29 LTD that will power up, but wont talk or receive.


First make sure the switch on the front is not set to PA or Weather if the unit has the weather featurre.

Then look to see if the receive/transmit meter is showing any movement in either mode.

You had a Connex board installed? I bet that is wired wrong or a wire came off in the process

Do it yourself installation or a "expert"?

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sounds like somebody has tampered inside it , knocking out alignments. There is a resistor and very small transistor near back that controls transmit+receive. I don't know which number resistor it is on your model. I know where it is on Uniden/Cobra models(recommend Cobra 25ltd) Take to Cb shop or service repair place. They may help you. Just buy you a Cobra for cheaper and go with it.

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Radio cuts out occassionally...no transmit,no receive.if i tap bottom of it,it comes back for awhile.it's a cobra 29 ltd classic,has bigger finals and connex board installed.


Hi, my name is John. Welcome to FixYa. Take the cover off circuit board side, and with the eraser end of a pencil, touch around on the board trying to locate cold solder joints, have to look real closely and re-solder them....Thanks for choosing FixYa...John

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There are problems with having a loud talk back. You can get feed back and an annoying squeal when you transmit. That is why the talk back isn't that loud to begin with.

The reason you use talk back is to check your echo, and make sure your mic gain is not too high. It shouldn't need to be that loud to check it.

I highly recommend you leave it at the level that it is.

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5 pin cobra=1-Audio 2- Shield 3-Receive 4-Switching Wire 5-Transmit, you can jump pins 4 and two

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The Connex radio is a division of Cobra, and no offense, but Cobras are one of the cheapest radios around. The problem with your Connex is a simple receiver malfunction. The receiver probably worked great until it was put into storage for a long time, you can replace the receiver, or you can fiddle around with the receive gain until you hear something. But you may just want to send it to a radio store and have it looked at, to be honest with you, Connex is a terrible radio, they sound good, but they're terrible radios. Go with Galaxy or Uniden radios, you won't be disappointed.

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