[Elecraft] K3 keying at turn-on

[Tom W8JI]

<<I don't see the short output of RF that's being described.
(S/N 56 w/latest firmware).>>

That's probably because no one ever said there was an RF 
pulse.      :-)

It just pulls the TX line that runs out to the amplifier 
low. That's only a problem when the amp has a step start 
that cannot handle the quiescent current of the amp in the 
TX mode during start. RF would be a disaster with almost any 
amp, the TX line enable is just a worry with some amps and 
the real worry is only with a poorly implemented step start.