[Elecraft] K3 PTT -- done!

[Ed Muns]

>  Am I missing something or is this PTT stuff simply the same 
> as MOX (in a  Yaesu)?

PTT is a jack on the K3 rear panel that performs as you describe MOX below
when it is shorted to ground.  Typically a footswitch is connected to the
PTT jack.  QSK and SEMI break-in are disabled in this mode.

However, the opposite is not true.  That is, PTT is still enabled when QSK
and SEMI break-in are active.  However, in this case, QSK or SEMI break-in
will over-ride PTT and put the K3 into transmit whether or not PTT is
closed.  And, if PTT is released (open), transmission can still continue, or
commence, whenever there is a key closure.

>  Pressing MOX is the same as pressing the PTT and holding it 
> there  until switched off. TX light is on, RX is muted (ie 
> "Transmit Mode") and hitting  the key will transmit RF - it 
> overrides both QSK and VOX. MOX will only actually  put out 
> RF of it's own accord in AM or FM modes that involve a carrier.
>   
>  In QSK, both MOX and VOX are disengaged and "Break-In" is 
> switched in. Now  hitting the key simultaneously kicks in the 
> PTT and transmits RF but only for  the duration of the key press.
>   
>  I thought this is pretty standard stuff and would assume the 
> K3 would more  or less follow this protocol. But as I say 
> maybe I've missed something subtle in  the discussion in 
> which case I'll apologise and go back to sleep.

Yes, PTT-only CW is very standard.  It is on every radio, perhaps named
differently, that I'm aware of except the K2.  All that's happening here is
making sure this standard capability is included in the K3.  It seems like
big deal because of all the discussion and length of the reflector threads.

73,
Ed - W0YK