Saturday, March 11, 2017

"Weightless" Elecraft KX3 or KX2 microphone for SOTA

I operate mostly CW on my SOTA outings, but I always take this light weight mic along since it's built into my earbuds. This is just a standard smartphone ear bud/mic with an adapter purchased on Ebay that allows connection to computer mic/spkr jacks. Turns out that the earphone and mic jacks on the Elecraft KX2 and KX3 are compatible. To transmit, use VOX, or PTT with the XMT button. Note the essential windscreen. This was made with earbud foam hot glued to the mic housing. Keep the glue away from the side with the mic hole. This is a very lightweight microphone solution for the KX2 and KX3. Audio reports are good.


  1. Good idea. Thank you, i will try it too.
    73, Rado om2zz

  2. Do you have a link to that adapter?

  3. It works, thanks for the Tipp. Note that there are two competing standards for the TRRS-Jack pinout (yes, that IS very stupid), so the adapter needs to match the standard of the headset. The two standards are called CTIA and OMTP. Also tbh I still miss the ptt button, but apart from that it's a very nice and lightweight solution. 73 Steve