Question about Cobra 19 DX IV CB Radio

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When Mic is keyed TX illuminates but no green nand red bars light up. Anh help appreciated.

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  • Gilbert Ruiz Dec 02, 2014

    IF YOU HAVE KEYED UP THE RADIO WITHOUT AN ANTENNA YOU PROBABLY BLEW OUT THE FINAL TRANSISTOR ON THE OUTPUT.

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Get a SWR-PWR meter to put on the line between the radio and antenna to see what it is doing.

Posted on Feb 28, 2011

Testimonial: "Thanks. MIC WAS BAD"

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Youll find the screeing and the black wire have seperated

the screening is audio ground the back wire is used for switching ground so what happens is the radio will try too key up but wont quite get there as the TX enable ends up keyed via the mic @ 600ohms so the radio wont key up fully just half way

the black and screen coppers are usualy connected together
if they get separated then the TX will work in a kind of way like you describe

perhaps your mic cable is faulty and has bad wires

Posted on Dec 02, 2014

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Posted on Jan 02, 2017

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1 Answer

I need wire colors for CB microphone its a TRC


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The ant light and the other light light up red when i key the kic


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1. turn the knob labeled swr cal all the way counter clockwise
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Hi,

If the radio receives OK and the TX red LED will not lit up when keying the mic, then it is a mic or mic cord or mic connector problem (or pin configuration). Internally to the mic, there is a switch for keying the PTT. This should be check down to the coiled cord to the connector.

If all of the above checks OK, then you would need to check the TX/RX regulator/switching circuitry.

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.

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I’m happy to help further over the phone at https://www.6ya.com/expert/william_83fc156eee2b555e

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