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11 "Most" Popular MIC Wiring Diagrams

Note:   Pin-End Views

4 Pin Cobra Pin End View (2232 bytes)

4 Pin Cobra

Pin End View of Azden (2722 bytes)

4 Pin Midland (2234 bytes)

4 Pin Midland

Pin End View of Alinco (3146 bytes)

5 Pin Cobra (2269 bytes)

5 Pin Cobra

Pin End View of Icom (3048 bytes)

Realistic 5 Pin Din Plug (2280 bytes)

Realistic 5 Pin Din Plug

Pin End View of Kenwood (3094 bytes)

Pin End View of Alinco (2387 bytes)

Pin end View of Yaesu (2832 bytes)

Pin End View of Kenwood HT's (2483 bytes)

Kenwood HT's








Red White Black Braid Blue (yellow to shield)
White Red Blue Braid Black
Red White   Black (Blue up/Brown down)
Echo Mst., Pro
Brown White Green Braid  
JM+2, JM+3, RK50J, 60J, 70J, J+350, J+50, +2, +3, SSK
Black White Red Braid  
M+2U, M+3, RK50, 56, 60, 70, +350, 450C
Black White   Braid Red
M+3SPECIAL, M+3B, RK56, 66, 76, EXP400, CS1, +3B, CS3, EXP500
Blue White Black Braid Red


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Diagram of Advanced MIC Wiring Tips for Relay Switching, Electronic Switching, and Special Electronic Switching Microphones (17602 bytes)

Ohm Meter Graphic (2260 bytes)

There are three basic types of dynamic microphones, (A) relay switching, (B) electronic switching, (C) special electronic switching.  If the old mic. is available, figuring out the wiring code is just a matter of trial and error.  Lets look at Figure (A) the relay switching mic.   Using an ohmmeter it is possible to find the mic. element wires B, C by pressing the mic. key, the meter will read about 500+ ohms.  some mics. might read higher, don't worry test, it may be OK.  The next wires to find are A & D, these switch the transmitter on.  It will read open until the key is pressed, then ohms will read shorted.

In figure (B) electronic switching the ohm meter reads open on wires A, D and shorted wires A, B.  A, B usually grounds the speaker for audio, but when key is pressed for transmit, the speaker goes off or A, B opens and A, D is shorted, to turn transmitter on.  Now note A, C is open until mic. key is pressed, then ohms read 500+ or more for mic. audio.

The most involved mic. is the special mic. Figure (C).  The main wiring is the same a Fig. (B), but there is another set of wires D, E, F.  Usually this set is used to switch voltages from receiver to transmitter.  Voltage is on wire E, then E, D will supply voltage to receiver.   When key is pressed E switches to F and supplies voltage to the transmitter.   Using an ohmmeter it is possible to see the opening and closing of this switch.