Lance, It has already been thought of and included in the K3 - see below.
I am not sure if you are referring to the KEY OUT jack on the back of the K3 or the PTT jack. The PTT jack is an input - one would plug the footswitch into it, or alternately use the PTT on the microphone or the PTT from the RS-232 input. KEY OUT becomes active as soon as the PTT is activated - there is also a KEYOUT-LP signal on the ACC connector that acts the same as the KEY OUT jack except with a limit of 10 ma. The K3 normally transmits RF after the KEY OUT is active by the amount of time entered into the CONFIG menu TX DLY parameter - that provides a maximum of 20 ms RF delay. For those who need more time that that, there is the TX INH function that can be configured for pin 7 of the ACC connector - it can be configured for either TX INH LO=Inh or HI=Inh. This signal will prevent the K3 from transmitting RF until the inhibit signal goes away. See the K3 Owner's manual page 19. 73, Don W3FPR Lance Collister wrote: > Hi Dave, > > You raise an interesting question....maybe that is the elegant solution to > integrating the K3 into old kluge-like VHF stations with lots of coaxial > relays, > homebrew amplifiers, etc. > > PTT output jack on the rear of the K3 could optionally be configured as a > sequencer itself, so it would close an adjustable amount of time (up to a > second) > BEFORE any RF would be permitted to be generated after the rig is put into > XMIT by > either the microphone/footswicth or the serial port PTT lines. > > Certainly, this option would not be selected by those who want to work QSK! > But > they would simply not choose the option. If this option were stored by band, > you > could have a built-in sequencer only on certain bands, and QSK on other > bands! > With such an option, you would never have to worry about blowing anything up, > regardless of how the K3 incoming PTT line itself was keyed ;-) > > What do you think, Elecraft? VY 73, Lance > > _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
