> On Apr 1, 2018, at 12:44 PM, Edward R Cole <kl...@acsalaska.net> wrote:
> 
> Next to test with KX3 (I will need four ring wye to two 3.5mm jacks extension 
> - I believe obtainable from Elecraft).
> 
> PS: CM-500 still in transit

An off-the-shelf stereo to right/left splitter should do the job. That puts the 
buttons (logic bias) on one channel and leaves the mic and mic bias on the 
other.

Details in this blog post:

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)

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