Am setting up a newly acquired used K3 which came with no microphone. Is
it possible to use an adapter to make a Lightspeed Zulu noise cancelling
headset work for the K3. I got very nice reception using the cell phone
attachment line but can't identify any microphone function. The two main
lines are different sizes, per standard aviation usage.
Yes, aviation headsets use different size connectors for the mic and
phones. I believe the headphone use a standard 1/4" and the mic is a
.206" (5.25mm) plug. I made an adapter to use my aviation headset on
the K3 but got reports of garbled audio (probably RF getting into the
cable or my adapter). I did get good results using the noise canceling
headset for RX and a boom mic for TX.