[Elecraft] Microphones - Yaesu MH-31

[Don Wilhelm]

Steve,

The MH31 mic is a dynamic type and does not need bias.
I suspect that you do not have the correct wires connected.  Take a look 
at the wiring for that microphone at 
http://homepage.ntlworld.com/rg4wpw/mh31a.html

Pin 4 goes to the tip
Pin 5 goes to the shell
Pin 3 goes to Ring 1
Pin 2 goes to Ring 2

Look at the diagram on G4WPW's mic page to be sure you count in the 
right direction on the RJ-45.  It is left to right as you look into the 
socket (opposite if you look at the end of the plug).

73,
Don W3FPR

On 7/24/2012 7:06 AM, Steve KC8QVO wrote:
> I have a spare Yaesu MH-31 from my FT-857D that has never been used. So I
> figured I would implement it with the KX3.
>
> There is very little audio coming out of the rig, the ALC will not budge on
> max audio and compression unless I whistle in to the mic where it will hit
> about 5 tick marks. I can hear audio when I turn the monitor gain up or
> listen on another rig, but it is not strong.
>
> The cable I have with the mic is a cut off end of a CAT5 cable, about 5'
> long. The RJ-45 is used on the mic end and the wires are soldered to a
> 4-circuit TRRS 3.5mm plug on the rig end.
>
>