It is a TRRS 3.5 mm socket. If you want to use a non-Elecraft mic, you might want to break out the PTT line. You can do that with a stereo-to-mono splitter.
I wrote a blog post about that, here: https://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 Sep 9, 2018, at 4:23 PM, Mike Flowers <mike.flow...@gmail.com> wrote: > > Hi Folks, > > What size is the MIC socket on the side of a KX3? It appears to me to be > larger than a 3.5 mm socket. > > I'm getting a new-to-me KX3 here on Monday and want to be prepared. > > Thanks for your help. > > *73 de Mike, K6MKF - Director & Past President, NCDXC* > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to wun...@wunderwood.org ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com