[Elecraft] K144XV?

[K7MDL]

Could be used for TR signal to a mast preamp or an external amp, but most of
those I have seen need 12V by deafult.  I suspect the 5V is more useful for
transverter TR switching for simplified connections (fewer wires).  You
could have the transverters mounted on a tower making this method more
attractive.  Several transverters support this method of switching.  They in
turn usually have external PTT.  By the time you get a chain of VHF+
equipment hooked up on towers and such, you are probably looking at a
sequencer and/or careful use of indicator contacts on TR relays for positive
switchover control vs a pure timing based operation (hoping the relay
switches in time, every time).



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