"Telstar Electronics" wrote in
ups.com:


Frank Gilliland wrote:
Or, if the extra
wire is too expensive, how about modifying the radio to superimpose a
DC keying signal onto the coax that can be detected by the amp?

This is exactly how the "multiplexed switching "capabilities of the
SkyWave amplifiers work...

www.telstar-electronics.com



I was wondering what you had meant my multiplexed. I've been to that with
my UHF and microwave amplifiers for years, external keying.

SC