Be sure you are pressing the CB microphone button all the way in.

Check the pins in the radio for damage as well. Check for breaks or damage to the plug and cord.

Make sure your CB mic is plugged in securely.

If need be, you can very gently spread the pins with a small flathead screwdriver.

Ensure that the microphone pins on the radio are making a connection with the microphone plug.Make sure the connections are tightened.Yellow - Receive Ground (not normally used)Ħ Pin President Microphone DNC520 Microphone Wiring:.Wiring Color Codes for Astatic 6 Wire Microphones: TX = White, MOD = Red, REC = Blue, Shield = Braid, Common = Black TX = ?, MOD = ?, REC = ?, Shield/Common = ? TX = White, MOD = Red, REC = Blue, Shield/Common = Braid/Black Wiring for the C29 LX MAX and the C29LTDBT: (Extra NOTE: The popular Astatic 636L-DX1X is compatible with these) The chart and image above are correct for these models: We will continue to try to get all the information that we can listed on this page. Mic wiring can be frustrating enough, but when you can't find the right wiring info, it is just impossible. The list below offers some microphone wiring information. There are some radio brands that have the same general wiring (such as Cobra and Uniden) but that is not always the case. Generally, a radio manufacturer will wire their microphones the same so that the microphones are interchangeable between their radios, however, this is not always the case.įor example, Cobra 4 Pin radios are wired 1) Shield 2) Audio 3) Transmit 4) Receive while Midland 4 Pin radios are wired 1) Audio 2) Shield 3) Receive 4) Transmit. For example, just because two different microphones are 4 pin does not mean that they are wired the same, even if they are the same brand! Different manufacturers may wire their microphones differently.

We created this page to help people understand that not all microphones are wired the same way.

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