Here is the link I think you are asking about. http://ellmore.net/na1dx/?p=469 -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-Recent-post-about-n1mm-macros-to-send-FSK-without-fancy-hardware-tp7610241p7610276.html Sent from the Elecraft mailing list archive at Nabble.com.