Wiring Johnson Microphone to cobra 29 CB Radio

Wiring a Delta M3 microphone to a Cobra 29 LTD Classic CB radio requires connecting the wires from the microphone to the corresponding pins on the radio's microphone jack. Here are the steps:

1. Locate the microphone jack on the front of the Cobra 29 LTD Classic CB radio.
2. Examine the Delta M3 microphone's wiring. It should have four wires: a black wire, a red wire, a white wire, and a shield wire.
3. Determine the pin configuration of the microphone jack on the Cobra 29 LTD Classic CB radio. The pin configuration is usually printed next to the microphone jack or in the owner's manual.
4. Connect the Delta M3's black wire to the pin on the microphone jack that corresponds to the radio's ground connection.
5. Connect the Delta M3's red wire to the pin on the microphone jack that corresponds to the radio's positive voltage connection.
6. Connect the Delta M3's white wire to the pin on the microphone jack that corresponds to the radio's audio input connection.
7. Connect the Delta M3's shield wire to the pin on the microphone jack that corresponds to the radio's shield connection.
8. Test the microphone by speaking into it while monitoring the audio output on the Cobra 29 LTD Classic CB radio.

Note: If you are unsure about the wiring or pin configuration, consult the owner's manual for your CB radio or seek assistance from a qualified technician. Improper wiring can damage your radio or microphone, and may result in poor audio quality or no audio at all.

I believe to wire a Sadelta M3 microphone to a Cobra 29 LTD Classic CB radio:

The Sadelta M3 microphone has four wires: white, shield (bare wire), red, and black. The Cobra 29 LTD Classic CB radio's microphone jack also has four pins: Pin 1 (Audio), Pin 2 (Ground), Pin 3 (Transmit), and Pin 4 (Receive).

To wire the Sadelta M3 to the Cobra 29 LTD Classic, you need to connect each wire from the microphone to its corresponding pin on the microphone jack. The white wire carries the audio signal from the microphone's element to the radio, the shield wire provides a ground connection, the red wire activates the radio's transmit function when the microphone is keyed, and the black wire is used for receive audio.
Here are the specific steps to follow:

1. Cut off the existing microphone plug on the Sadelta M3 microphone cord.
2. Strip about 1/4 inch of insulation from each of the four wires in the Sadelta M3 microphone cord.
3. Connect the wires to the pins on the microphone jack as follows:

• White wire to Pin 1 (Audio)
• Shield (bare wire) to Pin 2 (Ground)
• Red wire to Pin 3 (Transmit)
• Black wire to Pin 4 (Receive)

1. Solder each wire to its corresponding pin on the microphone jack. You may want to use a multimeter to verify that each connection is solid and that there are no shorts or open circuits.
2. Once you have soldered all the wires, test the microphone by speaking into it and checking that the radio's TX meter moves as you speak. Also, check that you can hear audio through the radio's speaker when receiving signals.
3. If the microphone is working correctly, use heat shrink tubing or electrical tape to cover the soldered connections and provide strain relief for the wires.

Note that some microphones, including the Sadelta M3, may have additional features such as a built-in amplifier or power supply that require additional wiring.

It should just connect with the plug

eBay states.

This is a brand new Workman replacement omni-directional CB radio microphone. Features a 5-pin connector and a flexible coiled cord.

Wiring:

Pin 1 - Audio

Pin 2 - Ground

Pin 3 - RX

Pin 4 - Common

Pin 5 - TX

Compatible Radios:

Cobra 90LTD

Cobra 140GTL

Cobra 142GTL

Cobra 148GTL

Cobra 148-F-GTL

Cobra 2000GTL

Cobra 2010

Uniden Washington

Uniden Grant XL

Uniden Madison

https://www.google.com/search?q=connect+Superstar+507-5+microphone+to+a+Uniden+Washington

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This is the only resources out there that is remotely close.

https://www.wearecb.com/cb-microphone-wiring-page-2.html?selected_section=discussion

https://www.scribd.com/document/186885200/Mic-Wiring-Diagrams

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

if you have another cobra mic that was previously used on a 29 it should fit . just about all 4 pin cobra mics are alike .You can even use them on Galaxy radios and others.

There are a few different things that can cause this problem. 1: If it is a power microphone (a microphone that requires a battery). Try replacing the battery. 2: Broken wires that go from the microphone to the plug that plugs into the radio.You can try gently taking the plug apart and inspecting the wires. If only one has come loose, you can re solder it to the pin it came from. If more than one has come loose, find a wiring schematic for the radio that tells which wire goes to which pin and re solder appropriately. 3:Have the SWR's checked on the antenna. If the SWR's are to high and the radio has been being used in this fashion, it could have burned up the transmit finals in the radio. If this is the case, you will need to take it to a reputable radio repair facility to have fixed.

Here is a website with the information you need.

does it have a sheld wire?

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.

Goodluck
Rob