Lancer wrote:
Please explain your multiplexed keying capabilities...

Aside from the usual COR (carrier operated relay) switching, the
multiplexed keying capability is designed into the SkyWave 2879AB (and
soon to be released 2879ABTC). It allows the user to "hard" key the
amplifier as soon as the mic button is pushed... regardless of what
mode they're transmitting in, with no additional wiring. This is done
with a simple modification to the radio. Email me, and I will send you
the information in the form of a PDF file.

www.telstar-electronics.com