On Thursday, August 18, 2016 at 2:15:11 PM UTC-4, Lloyd E. Sponenburgh wrote:
Garrett Fulton fired this volley in
:

One thing the KY-28 units would do was to make a single "boop" sound
in the headsets when you keyed the transmitter. Let you know it was
ready to encrypt audio.

Yep. That was it!

Lloyd

Well, anyhow, a belated welcome home Sailor. Thank you for your service.