I installed a Maxon MCB40 in my jeep but lost the orignal mic for it. My friend gave me a Cobra CA73 mic and when its plugged in all I get is humming and clicking. I think the pins are different for both of them. I have the cover off the cb and the end off the mic but dont have a clue where to swap the wires to. Can someone help me out. Thanks
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Sounds like the mic plug or inlet is bad,could be a bad mic or plug wired wrong.Try, if you can,a different mic that you know works for your model,if this also fails,a qualified tech is going to be needed to repair.I will suggest one thing you can try,if your confident enough, is where the mic plug goes into the radio there are four or five pins,look closely at the pins and you will see they have slots on the top of them, with the radio power disconnected,not just turned off,try spreading the slots open slightly with a precision slotted screwdriver or small object that will accomplish this,don't use a wood toothpick,it could break off in the pin.Now plug the mic in and tighten it down,reconnect power and see if this solves problem..Good luck
The d104 is a power mic. For what you have explained you have something gone array in your mic or the mic plug. The fact the d104 is a power mic should not make anything hum. With a lot of power behind your CB and the power mic things can sequel with the mic gain turned to high. But a hum is more than likely a bad mic. Try another one. The same kind of mic should be fine.
Hi,my name is John. Welcome to FixYa. I,am not to sure, but as I remember this is the same wiring as the Cobra stock mike. #1- shield, #2- white, #3- red, #4- black. Thanks for choosing FixYa...good luck....John
This is a classic indication of a lost shield or ground connection in the mic circuitry. Double check these connections for good contact in the mic *and* the plug at the other end of the cable.
Check the grounding and SWR or "match"of the antenna system, too. A poor SWR (greater than 1.5:1 or 2.0:1) can cause the reflection of RF back to the radio. Modifications can increase sensitivity of the mic to this unwanted RF.
I recall the combo unit as I used to sell them. I am about sure they are no longer avaidable. You never know, you might see something on ebay/auction sights that might be to your liking. Good Luck.