[Elecraft] K3 with Yaesu Quadra?

[Joe Subich, W4TV]

The K3 ACC connector appears to provide Band Data and PTT 
out signals suitable for driving/Controlling the Yaesu Quadra 
(VL-1000) amplifier.  Is it possible to program one of the 
"DIG" signal lines (other than DIG0 which is used for FSK 
input) to work with the Quadra's "F-SET" output?  

F-SET is a relay contact that places the Yaesu transceiver 
in CW Keydown and a specific power level (e.g., 10 watts) 
for tuning the Quadra's antenna tuner.  It would be very 
handy to be able to access a low power tune output for other 
uses - manual tuners, etc. - in addition automatic operation 
with the Quadra/VL-1000. 

73, 

   ... Joe, W4TV