Are you using the Elecraft KX2 mic with the buttons? If not, try disabling the buttons in the menu. Otherwise, maybe a poor connection? Hope that helps, -- 73, Dave, N8SBE Hey guys, Anyone know why I keep seeing Ext. Mic Displayed on the screen of the KX2 every once in a while when keying the mic? Thanks! Semper Fi, Bob Perry KD9BPO