Bob, You apparently have selected a transmit filter for CW that is too narrow. The transmit filter for CW must be the 2.7 or 2.8 kHz filter. 73, Don W3FPR On 1/22/2015 10:29 PM, Bob Gibson via Elecraft wrote: > Will I guess I'm stupid.. I just got my new k3..I'm trying to send cw and when I do I get a err txf message.. What am I doing wrong? 73s Bob W5RG >