[K3] 2 Tone FSK (RTTY)

[W0JFR]

Has anyone been able to get 2 Tone FSK to work with a K3?

In my case, I use a W3YY optical encoder for FSK and PTT. FSK & PTT work
fine with MMTTY, and PTT works with WSJT; however, when I setup FSK in 2
Tone, I get a brief (less than 1 second) RTTY tone, and that is all. I
can see the entire message in the N1MM Digital interface, so I know the
message has been generated. I am using serial RTS for PTT, and I can
verify it is working by monitoring the voltage on serial Pin 7. When RTS
is generated, I also see PTT activated (PTT is grounded, so voltage
drops to zero).

David, G3YYD, suggests NOT using FSK because the 2 Tone AFSK modes are
superior (especially the differential mode, DOOK). These modes use VOX
for PTT, and do work. I would like to get FSK working, too, so I can
compare the RTTY transmit modes.

Thanks,
   - 73, John, N0TA
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