I started to play with RTTY this morning, and cannot get the K3 to transmit. The K3 is set for AFSK A, 2125 170. Vox is on. Monitor level is 15. CW works FB. The computer is a MacBook Pro pushing an iMic set for line level. I can hear the output from the iMic if I plug fones into it. The RTTY program is CocoaModem 2.0. What have I missed/mis set? 73, Mike NF4L