Question about Astatic 636L Noise Canceling Microphone Microphone

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Mic wire diagram

I need to wire a astatic 636 to a sears roadtalker ssb cb radio 40channel

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  • Anonymous Mar 20, 2014

    wiring diagram for wiring the jcd-21m base mic to the 2995dx cb raidio


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Posted on Dec 30, 2008

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From the astatic wiring handbook (which I downloaded in pdf) There is only two ways sears radios get wired the most common way is WH-4, SH&BL-1,Red-3,BK-5 Y-N/C

if the radio has 562.38220700 ( i think this is a serial number run) WH-4, SH&BL-1,Red-3,BK-2 Y-N/C

As I said this is from the astatic_wiring_handbook.pdf which I downloaded sometime ago to rewire a friends mike. I wish I could remember where I got it but I don't.

Good luck

Posted on Dec 07, 2008


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1 Answer

How do I wire an Astatic 636l for an Yaesu Ft101zd?

At transceiver:
Pin 1: ground/PTT common
Pin 2: mic +
Pin 3: PTT NO
Pin 4: not used

At the mic, I think:
Pin 1: shld&blue
Pin 2: white
Pin 3: red
Pin 4: black

Sep 19, 2014 | Astatic 636L Noise Canceling Microphone...

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How do i wire my d104 m6b mic for my president dwight d cb raido


This must be the right pinning

Pin 1 = shield / blue
Pin 2 = white
Pin 3 = red
Pin 4 = black

good luck,

Feb 05, 2010 | Astatic 636L Noise Canceling Microphone...

1 Answer

Does anybody know the wiring sequance that you would use for the Astatic 636L Noise Canceling Mic To a six pin plug to a Midland Alan 48 cb

Its not in my area of expertise but maybe this link will have some info:

Aug 25, 2009 | Astatic 636L Noise Canceling Microphone...

1 Answer

The mic doesnt work use to but all the sudden it quit doesnt even key up so i can hear it my talk back

First, try another mic on the radio to be sure it's the mic and not the radio causing the problem. If it's the mic, check the wiring circuits for a bad switch or broken wire. Simply...the TX circuit is closed and the RX is open when the key is squeezed. The RX circuit is closed and the TX circuit is open when the key is released. Use a simple ohm meter to check for resistance between the pins on the mic (after removal from the radio of course). Open circuit will read 1, closed circuit should be very close to zero. You'll probably find the TX circuit never closes when the key is squeezed. Could be a broken wire or faulty switch in the handset.
Also check...If the mic "keys up" see the meter move normally, but no's either a faulty mic element (the little round thing you talk into) or the audio circuit of the radio has a defective component which a good CB shop can replace.

Jun 14, 2009 | Astatic 636L Noise Canceling Microphone...

1 Answer

Mic problem

Hi and welcome to FixYa,

Offhand, the 4 pin mic connector and corresponding pin # would depend on the communications equipment the Astatic was initially wired for. However, the color coding of the wires in an Astatic would be:
  • white - mic audio;
  • shield/blue - gnd;
  • black - NC or speaker;
  • red - NO or PTT;
  • yellow - not normally used.
Good luck and Thank you for using FixYa. Happy Holidays.

Dec 09, 2008 | Astatic 636L Noise Canceling Microphone...

1 Answer

Astatic noise canceling microphone to 4 pin cobra 29 ltd classic

According to the astatic wiring hand book it is not used. I would leave it terminated but long enough that if you find your having noise when you receive you could still ground it. I'm pretty sure you don't need it.


Nov 02, 2008 | Astatic 636L Noise Canceling Microphone...

1 Answer

Sears roadtalker ssb 40 channel

if your talking about the Sears Roadtalker 40 am only model I got ya covered...its the same pinout as the radio shack 5 pin is the order
Pin 1 = GND
Pin 2 = Not Connected
Pin 3 = transmit
Pin 4 = Audio
Pin 5 = Recieve
Hope this helps you..

May 14, 2008 | Microphones

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Astatic mic. model 636-L

Mar 13, 2008 | Astatic 636L Noise Canceling Microphone...

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