For the KX3, you can build an adaptor or use any old stereo to mono splitter. That breaks out the tip and ring for you.
It is quite simple, but I explained it in a blog post regardless. http://observer.wunderwood.org/2015/08/16/yamaha-cm500-headset-with-ptt-on-elecraft-kx3/ <http://observer.wunderwood.org/2015/08/16/yamaha-cm500-headset-with-ptt-on-elecraft-kx3/> wunder K6WRU Walter Underwood CM87wj http://observer.wunderwood.org/ (my blog) > On Feb 12, 2016, at 3:10 PM, Don Wilhelm <[email protected]> wrote: > > Jim, > > A Yaesu microphone will not work with the K3/K3S unless you construct an > adapter to change the microphone pinout. There are no menu settings to > accomplish that feat, you must build an adapter to route the AF and PTT and > their Return paths to the appropriate pins on the K3/K3S microphone jack. > > The CM500 has a stereo mic plug, but the tip and ring are connected together. > That is no "never mind" for the K3, but for the KX3, it does cause a > problem. Without building an adapter, you can turn off bias and turn MIC BTN > off, and it will work. The bias is supplied from the residual voltage of the > digital voltage designed for the MIC BTN. If you find that digital voltage > produces digital noise in your signal, the only cure is to build an adapter > to isolate the ring from that digital voltage and if you do that, you will > have to turn BIAS on for the CM500 to operate. > > 73, > Don W3FPR > > On 2/12/2016 5:55 PM, [email protected] wrote: >> Thanks for all the responses. I find them very interesting. The only thing >> that I'm missing is comments on the Elecraft MH2 Handset. I noticed that the >> CM500 has two stereo plugs and the mike inputs are mono. I have a Yaesu desk >> mike but can't figure out the menu settings to use it's PTT switching. In >> the meantime, I'm having fun with the Heil K2 headset that I bought for use >> with my KX3. Having great fun with the new K3S! Jim KC0TRK >> > > ______________________________________________________________ > 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 > Message delivered to [email protected] ______________________________________________________________ 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 Message delivered to [email protected]
