Thanks for your comments, Graham. Yes, I'm going to measure the S/N with preamp in and out as soon as I get home next week Paul ----- Paul, N2PD -- View this message in context: http://elecraft.365791.n2.nabble.com/K2-EXCESSIVE-PREAMP-NOISE-tp7578009p7578083.html Sent from the Elecraft mailing list archive at Nabble.com.