Forest, You may want to look at my website article www.qsl.net/w3fpr dealing with adding a CW PTT to the K2. The added PTT input will work both in CW and SSB mode and will mute the receiver, but no RF will be produced - this will be positively true in CW unless one also activates the paddle lines.
It sounds like you already have some sort of external switching in place which could provide the PTT input signal (contact closure or equivalent). The only problem that I can forsee is in SSB mode because the carrier balance adjustment is not perfect and there will be a bit of RF output even with no audio applied - and that may not even be a problem, but if it is, I guess one could break the carrier oscillator path permanently if the K2 was never to be used as a SSB transmitter. An alternative would be to disable the carrier oscillator injection path elecrtonically - that could be done on the SSB option board. 73, Don W3FPR ----- Original Message ----- Hello Listees, I am tying to figure out how to use the K2 as a receiver in conjunction with another rig as a transmitter. Is there any way to mute the K2 from an external signal. Would controlling the T/R switch from outside rig do it? If so, where would be a good place to tie in to the K2 to accomplish that? What I'm tying to do is run RTTY using a 150 watt transmitter in FSK mode while using the K2 to receive. _______________________________________________ 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
