Please ignore. After a few turning of and on, reloading N1MM, etc., KRX3 is working well again. Have no idea why BNC input was not working. Ignacy -- View this message in context: http://elecraft.365791.n2.nabble.com/KRX3-always-uses-antenna-from-main-RX-tp7606130p7606131.html Sent from the Elecraft mailing list archive at Nabble.com.