I neglected to mention that I am using a Yaesu FT-1000 (not MP, not Mark V) and a dedicated Intel P233 processor. I made the PTT changes in the Ports setup section that Dick, WC1M, suggested, but the problem is exactly as before. (Comm PTT was "yes", and All mode PTT on CW port RTS was selected) Any other suggestions? Tnx & 73, Art/W4AA