It always pays to search around the FAQ. Try: http://www.elecraft.com/K3/K3FAQ.htm#SO2R AND...use the searchable archives: http://marc.info/?l=elecraft Just type in SO2R and you'll get more hits than you know what do with. The short answer is NO. SO2R implies receiving while you are transmitting. You'll need two radios. de Doug KR2Q