Question about Cobra 25 LTD 40-Channels Base CB Radio

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Mic wiring for a cobra 85 base cb

I know this cobra is different from some of the other ones.

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  • Dottie Gentry May 11, 2010

    what kind of micrphone to you have???? They have different mic wiring diagrams for different mic. I have a wiring code for an astatic 1 BLUE AND SHIELD 2 WHITE 3 RED 4 BLACK YELLOW NC TRY THAT GOOD LUCK

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Pin 1 is shield, thats the bare wire wrapped around the mic audio wire
pin 2 ic mic audio [usually white)
pin 3 is transmit or push to talk usually red
pin 4 is recieve or speaker complete usually black

Posted on Feb 10, 2009

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1 Answer

I have cobra ca61 desk mic i need it wired to my cobra 142 gtl home base. the base has 5 pins so i need my mic to be wired for 5 pin... any ideas?


cobra 5 pin to 4 pin adapter on ebay around $5.00
http://www.ebay.com/itm/WORKMAN-C4P5C-CB-RADIO-MICROPHONE-ADAPTER-5-Pin-COBRA-TO-4-Pin-COBRA-/121655850211?hash=item1c5340f4e3:g:e0AAAOxy2YtRsJ8n

Apr 10, 2015 | Cobra CB Radios

1 Answer

Cobra 142 GTL feeback audio


put on a different mic and see if it still happens.I am going to attempt to draw an insert so if it works follow it if it doesn't I'll explain it.
this wire is the audio on the inside of mic
-------------------------------X-------(4700ohm 1/4 w res) ----X---------
.001 .001
this wire is the shield
-------------------------------X-------------------------------------X----------
at the point marked with X take two .001 capasitors and wire them from one wire to the other. this should make your squeal go away.

Apr 16, 2014 | Cobra 148 GTL 120-Channels Base CB Radio

2 Answers

D-104 wiring to a cobra cb


Find your radio on this page and then look at the wiring diagrams

Oct 11, 2012 | Astatic D104 T - Ug8 Crystal Microphone...

1 Answer

I have an older cobra 19 dx the mic cord got pulled out its a 4 pin ther is a purple,red,black with yellow and a bare wire i would like to know wich one goes where?


On the Internet search "Cobra 19 mic wiring" and you'll get lots of hits with wiring instructions for various mics used on that radio. You will need some soldering skill to put it back together. Also use shrink tubing to seal it up afterwords so no unshielded wires appear outside the wire clamp. There are lots of compatible 4-pin Cobra mics at CB shops and truck stop shops.

Feb 19, 2011 | Cobra 19 DX II 40-Channels Base CB Radio

1 Answer

Need to wire a high gear m75 for acobra sound tracker


It should already be wired for that radio. Its a cobra mic, on a cobra radio, its all wired for cobra. Witch is a very common mic wiring.

Nov 09, 2010 | Cobra 29 WX NW ST 40-Channels Base CB...

1 Answer

I won't transmit or receive and it doen't key up. I hooked up a spare cobra 25 and it worked fine, but I like Uniden better.


Hi,my name is John. Welcome to FixYa. First try a different mic, one thats wired for it, if I remember the cobra mic will work on it. If that does not do it, let me know, might be internal that I also can help you with. Good luck and thanks for choosing FixYa....John

Nov 04, 2010 | Uniden Bearcat Pro PC68LTW 40-Channels...

1 Answer

My radio recieves ok but only whistles when i key the mike is this a major fix?


Do you have talkback installed? It my be too loud and causing feed back. Back the mic gain down if so.

Could also be improper mic wiring. If you use a mic that is wired for a different radio, it could just cause a hum, buzz or squeal.

Another thing that can cause a hum, buzz or squeal is a faulty volume and or squelch knob depending on the radio.

  • Turn down or disable talk back.
  • If you cannot turn off or disable talk back, lower mic gain.
  • Try a different mic that you know is wired for cobra.
  • Play with volume and squelch knobs while TX and see if it stops at all. If it does replace knob.

Oct 12, 2010 | Cobra 150 GTL DX Base CB Radio

1 Answer

Converting a different brand of mic for a midland CB


This should be a typical Midland pinout. If you are using a generic 4 pin mic that is wired to cobra/Uniden, all you have to do is switch pin 1 & 2, then 3 & 4.

Not all mics are color coded the same with their wires.

Oct 06, 2008 | Midland 1001Z 40-Channels Base CB Radio

1 Answer

I can hear others but when i talk noone hears me


Try switching a different mic, sometimes the transmitting wire comes loose inside the connector. If you are handy enough, you can even unscrew those two tiny screws on the end of the mic cord and see if a wire is loose and if so, solder it back into place.

Oct 04, 2008 | Cobra 29 WX NW ST 40-Channels Base CB...

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