Hi Don, My mistake - yes, the internal ATU option for K3S is installed. I'll try as you suggested and report back. Thanks! Bret/N4SRN -- View this message in context: http://elecraft.365791.n2.nabble.com/P3-P3TXMon-Wattage-SWR-tp7633727p7633732.html Sent from the Elecraft mailing list archive at Nabble.com.