I have looked through the manuals and have not seen how one hooks up all three together using the serial ports. How is this done? Thanks, Tom VA2FSQ -- View this message in context: http://elecraft.365791.n2.nabble.com/Hooking-up-k3-p3-and-kpa500-tp6875624p6875624.html Sent from the Elecraft mailing list archive at Nabble.com.