[Elecraft] KX3 mic jack *will* work with other mics/headsets having a regular stereo plug

[Wayne Burdick]

In response to a few questions on this topic:

The KX3 has a 4-circuit 3.5-mm jack, allowing for UP/DN and PTT  
controls as well a mic audio shield ground. The MH3 has a matching plug.

However, the mic jack can also be used with mics having a 3-circuit  
(stereo) plug. These will not provide PTT or UP/DN controls, but can  
still be used with VOX or the XMIT switch (equivalent to PTT). Two  
menu entries are provided for mic configuration: one to turn bias on/ 
off and another to turn the UP/DN buttons on/off.

Heil headsets with two stereo plugs (one for stereo receive audio, the  
other for the mic) can be used. Generic computer headsets with these  
two plugs will also work.

There are very small, pivoting mics available from places like Fry's  
that have a 3-circuit plug. These are compatible with the KX3's mic  
jack, too, and in fact allow you to use the KX3 like an HT (in a pinch).

We'll expand our list of compatible mics over time.

73,
Wayne
N6KR