On 5 Mar 2007 22:22:27 -0800, "tjd" wrote:

On Mar 5, 7:53 pm, "Kyle Boatright" wrote:
One thing to be aware of if you plan on using it in flight in conjunction
with your headsets. You need a $10 push to talk switch if you want to use
your headset's microphone.

At least on the A24 that is not true; I just tested to make sure.
With a headset (and its mic) connected via the adapter, the behaviour
is the same as it is without a headset attached - you push the PTT key
on the unit to transmit. I don't own the external PTT switch but it
would appear to just be in parallel with the builtin one - possibly
more convenient but not required.

Hmmmm. I was fiddling with an ICOM IC-A5 a while back. I found that when you
used the radio-mounted PTT switch, *both* microphones were live...the one in the
headset, and the one on the radio itself. With the external PTT switch, only
the headset microphone was live.

Don't know if the A24 is the same, but it would be worth testing out. The
radio-mounted microphone won't be noise-canceling like the headset mike.

Ron Wanttaja