On Sun, 2 Sep 2007 14:42:06 -0700, "BT" wrote:

I have an older ICOM A22, my headset adapter includes both headset jacks and
a smaller 3mm plug for a PTT which I had to order for that size plug. Keying
the 3mm PPT works the headset mic.

I do not know if installing the headset adapter jacks to the A22 disables
the radio's on board mic, I believe that it will because I also have the
"speaker/mic" combination that I use in sail planes, clipping the
speaker/mic to the seat belt and letting the radio sit beside. That
connection disables the "on board" mic and it is the same style plug set for
the headsets adapter.

Thanks, BT!

The closest place I can get a proper PTT is ~ 30-40 minute one-way
drive, your info makes it sound like it's worth my while.