I getting to setting up my my K3S/100 with internal ATU with a KPA500/KAT500. I presently have antennas on the K3S ANT1 & ANT2 and use the K3S 2nd subreceiver for diversity receive. Does that work with the antennas connected to KTA500? Bret/N4SRN -- Sent from: http://elecraft.365791.n2.nabble.com/