If I recall correctly the FT-991 uses an RJ-45 mic jack rather than the typical 8-pin DIN connector Yaesu typically used on their "base station" HF radios. Both have received compliments on their sound on the HF bands, but I have yet to try either on FM as I have not yet built an adapter cable to interface the mics to my FT-8900 quad-band radio (eventually I will get around to such to facilitate net control duties). I also built an interface so that I can use a gaming headset (Turtle Beach XOSeven) and boom mic (condenser type mic) for hands-free use along with a foot pedal PTT switch, which works great for special events or contesting scenarios, or just plain sitting back and relaxing in a ragchew.
I do not have an FT-991, though I am considering getting one for field use and as backup radio, but I do have an FT-950 and the MD-100 desk mic and found it to sound very nice. So you are not simply stuck with the stock sound of any mic you may choose. Visit our Troubleshooting Radios Article for other helpful information.Click to expand.Keep in mind that the FT-991 includes a parametric equalizer so that you may also customize your mic's sound based upon your chosen mic and voice characteristics.If it is a power mic or echo mic, make sure there is a battery in it!.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:
#CRE 8900 DESK MIC MOD#
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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