For no particular reason (that I know of) my K3 serial #849 suddenly has no ptt function. I have gone into the menu and cannot re-engage the PTT. I get an error message of err tfx. The rig will tune in cw, but no PTT. What am I doing wrong? I'm sure it is painfully obvious. K0GFY R. Hunter Ellington 303-454-0543/720-560-8139 P.O. Box 44 Larkspur, CO 80118