thanks now it's quite clear. so if I select ant=nbc the sub ant in main path is the same ant of the main rx (one ant for both rxs)? rigth? best 73 luca -- View this message in context: http://elecraft.365791.n2.nabble.com/k3-sub-receiver-ant-selsction-tp5848447p5855885.html Sent from the [K3] mailing list archive at Nabble.com.