Question about Cobra 25 LTD 40-Channels Base CB Radio

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Cobra 25 only transmit and recieve on ch 1

Cobra 25 will only transmit and recieve on ch 1. the body was dented in where IC3 is located causeing it to short out, after that the ch display and slecter doesn't work, ch 9 switch doesn't work either.

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Hi, my name is John. Take the cover off the unit, and check for broken trace or loose solder joints around this area, ...hope this was helpful..Rate this solution on the four thumbs-up.....John

Posted on Sep 09, 2010

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Posted on Jan 02, 2017

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Cobra 25 ltd will not transmit it will on pa mode and it recieves i replaced the final pll chip audio chip.can you help


there is the problem. a $150 repair bill for a $ 25.00 problem. After you put in this new IC did you put it on a scope to check it out.How about a frequency counter to make sure you were on the right frequency? take it to a tech and let him fix it .

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Have a new cobra 148 gtl took out of box no transmit or recieve


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Jan 08, 2009 | Cobra 25 LTD 40-Channels Base CB Radio

1 Answer

Cant transmit


Hello Darren, Yes it sounds like the mic is wired bass ackwards,,! A cobra 25 mic wiring is
PIN #1- Shield or ground wire
PIN#2- Audio or Transmit modulation
PIN #3- Transmit or Dead Key
PIN #4- Receive Audio.
When your keying the mic, the RX wires are being connected to make the RX work,,,
*** Let me know how you get along with it. Either buy a new mic wired for your radio or you or someone comfortable with soldering needs to resolder the correct wires back on the mic plug,,,Like I said, let me know and have a great day,, Mechanic is back quiet!

Oct 21, 2008 | Cobra 25 LTD 40-Channels Base CB Radio

2 Answers

Cobra 29ltd cb radio


Hi,

A couple of suggestions:
1. verify that the RF Gain is maximum clockwise;
2. verify that the ANL or noise limiter is OFF;
3. pls add a ground strap from the body of the Cobra 29LTD to the chassis/GND of the vehicle or to your house GND connection;
4. Verify that your Wilson 5000 has a sufficient ground plane such as roof or metal objects.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

Jun 15, 2008 | Radio Communications

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