[Elecraft] Using RadioSport headset standard mic with KX3?

[Les Gasser W9XC]

Hi all,

I'm curious if anyone has an Arlan RadiosPort headset with the
standard red (M102) dynamic mic element, that they have working well
with the KX3. This is a great headset, but I can't seem to get enough
output from this mic element to get any usable level on my KX3.
Specifically, I can't find any setting of the "keyer/mic" level that
gives me any ALC bars at all at any speaking volume. (The RadioSport
mic has a 2-conductor T-S plug, but I do have the MIC-BTN menu item
set correctly for this and I do have some sound in the monitor
(headphones) when speaking.)

I wonder about this because the same mic works great with my Flex
6500, and I'd imagine the KX3 could accommodate a range of mic levels
as great as the Flex can.

Any help appreciated.

- Les Gasser, W9XC