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. > > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
