A simple stereo to mono splitter on the mic connector will split out the mic 
and PTT. It also give you a cleaner source for the mic bias.

Details here: 
https://observer.wunderwood.org/2015/08/16/yamaha-cm500-headset-with-ptt-on-elecraft-kx3/
 
<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 Dec 15, 2016, at 10:34 AM, Chris Tate - N6WM <[email protected]> wrote:
> 
> Greetings to the Elecraft brain trust.  I am in the process of putting a 
> couple of Island expedition kits together.  The KX2 fits the bill in the 
> TOTAL portability grab and go kit department. I have a question for the brain 
> trust while I try and pull an entire parts inventory for my mini kit.
> 
> What is the preferred method for hooking up a foot switch or small hand 
> switch to the little guy?  I am trying to remember what I did with the KX3, I 
> think there was an amp cable that I was able to key via an RCA plug.  Is it 
> the same deal with this?  is there another way of doing it?  Want to be able 
> to use a headset/boom mic, sometimes Caribbean beaches can get a bit noise 
> with chatter and such..
> 
> Just curious what the solutions are out there.. and I am sure there is 
> probably more than one.
> 
> Chris
> N6WM
> 
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