Or a spark gap? :-) 73, Bill W6WRT ------------ ORIGINAL MESSAGE ------------ On Sun, 07 Dec 2008 09:43:52 -0700, Jim Reisert AD1C <jjreisert at alum.mit.edu> wrote: >I know you can hook a paddle to a K3 to send RTTY, >but has anyone tried doing it with a straight key?