Microphone wiring Tried to wire Astatic d104 microphone to peaked galaxy 88 cb radio. Used 1 shield 2 white 3 red 4 black w/ talk back off. Radio transmits and receives but squeals. Turned down modulation knobs but very little to no audio modulation. Switch in d104 in E position. What's the problem? Stock mic. Works with stock Mic. fine.

Here are the pinouts for the 4 wire and 6 wire D104 mics. they were great microphones back in the 1980s. I used to have one on my Ten-Tac HF ham radio.

Astatic (4 wire) Astatic (6 wire)
1- Shield 1- Shield & Blue
2- White 2- White
3- Red 3- Red
4- Black 4- Black
Yellow NC

you just need to know what the pin out is for your 10M Radio. here is what each pin is
4 WIRE MIC CABLE
Pin Number
1 Audio Shield
2 Audio Lead
3 Transmit Control
4 Receive Control
here is the manual.
https://www.manualslib.com/manual/452637/Galaxy-Dx-98vhp.html?page=8#manual

Is the d104 a amplified tug8 (4 wire) or tug9 (6 wire)
or is it a non amplified mic?
Found this...hope it helps..........
Astatic (4 wire)
1- White
2- Shield
3- Black
4- Red

Astatic (6 wire)
1- White
2- Shield
3- Blue
4- Red
Black- N/C
Yellow- N/C

Notice the black mic plug has the numbers it is solder by numbers. Used rosin core silver solder radio shack sells it.
Mic Wiring
Stock
1-Shield (ground)
2-Yellow (audio)
3-Red (transmit)
4-White (receive)

Astatic
1-Shield & Blue
2-White
3-Red
4-Black
Yellow NC
Turner Roadking 56
1-Shield & Red
2-White
3-Blue
4-Black
Yellow NC
Sadelta the is a BASE mic
1-Shield
2-White
3-Brown
4-Green

Here are the Pin outs for different mics that will work with your radio. If a wire is not listed then you cut it off. It's best to keep the wires as short as possible no longer than a half inch is suggested. Normally the Cobra pin out is standard for most radios.

Stock - 1- Shield (Ground) 2- Yellow (Audio) 3- Red (Transmit) 4- White (Receive)

Astatic - (4 wire) 1- Shield 2- White 3- Red 4- Black

Astatic - (6 wire) 1- Shield & Blue 2- White 3- Red 4- Black Yellow NC

Daiwa EM-500, Cobra, CA Series - 1- Shield & Black 2- Red 3- White 4- Blue

Galaxy DC-521S - (4 wire) 1- Shield 2- Yellow 3- Red 4- Black

Galaxy CB-660EI - 1- Shield & Black 2- White 3- Red 4- Blue

Sadelta - 1- Shield 2- White 3- Brown 4- Green

Turner - 1- Shield & Red 2- White 3- Blue 4- Black Yellow NC

Wiring 1 4 pin D104 mic to a Uniden Grant CB is as follows -

• Pin 1 - Shield - Shield
• Pin 2 - Audio - White
• Pin 3 - Transmit - Red
• Pin 4 - Receive - Black

Regards, Tony

Hello,
Here is the wire diagram for several common mics in relation to a 4 pin CB. Most recent 4 pin CB's such as Midland, Cobra, Connex, Uniden, etc can use 4 pin mics. The wiring is actually depending on the mic rather than the CB so long as the CB's are 4 pin as well. Once you go back to late 80's the 4 pin design was a little different. Anything new it is simpler.
Stock Mic 1- Shield (Ground) 2- Yellow (Audio) 3- Red (Transmit) 4- White (Receive)
Astatic - 4 wire 1- Shield 2- White 3- Red 4- Black
static - 6 wire 1- Shield & Blue 2- White 3- Red 4- Black Yellow NC

Daiwa EM-500 Cobra CA Series 1- Shield & Black 2- Red 3- White 4- Blue
Galaxy DC-521S - 4 wire 1- Shield 2- Yellow 3- Red 4- Black
Galaxy CB-660EI 1- Shield & Black 2- White 3- Red 4- Blue
Sadelta 1- Shield 2- White 3- Brown 4- Green
Turner RK56 Road King 1- Shield & Red 2- White 3- Blue 4- Black Yellow NC
Regards, Tony

Hi,

This must be the right pinning

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

good luck,
Gerard

Hello there
Here is the diagram for you
Cobra 29LTD, 29LTD ST, 29WX ST
Documentation Project
CBTricks.com
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Mic Wiring
Stock
1- Shield
2- Audio
3- Transmit
4- Receive
Astatic (4 wire)
1- Shield
2- White
3- Red
4- Black

Astatic (6 wire)
1- Shield & Blue
2- White
3- Red
4- Black
Yellow NC
Daiwa EM-500
Cobra CA Series
1- Shield & Black
2- Red
3- White
4- Blue
Galaxy DC-521S (4 wire)
1- Shield
2- Yellow
3- Red
4- Black
Galaxy CB-660EI
1- Shield & Black
2- White
3- Red
4- Blue
Sadelta
1- Shield
2- White
3- Brown
4- Green
Turner
1- Shield & Red
2- White
3- Blue
4- Black
Yellow NC

You don't mention if the Madison is a 4 pin or 5 pin also you don't mention if the D104 is a 4 wire or a 6 wire microphone so this will be rather lengthly of an answer so if I help you could you atleast do the rating for me ? So here goes 4 pin / 4 wire 1]SHIELD 2] WHITE 3] RED 4] BLACK....O.K. 4 pin 6 wire 1]SHIELD & BLUE 2] WHITE 3] RED 4] BLACK YELLOW NO CONNECTION.....Are you with me so far ? Half over 5 pin 4 wire 1] WHITE 2]SHIELD 3] BLACK 4]N/C 5] RED.....5 pin 6 wire 1] WHITE 2] SHIELD&BLUE 3] BLACK 4]N/C 5] RED.I hope this helps you GOOD LUCK and have a good day Dan.

I have a browning golden eagle mark II. It has a two pin mic plug. I would like to hook up a astatic power mic to it. Anyone have an answer?