Spotted today, switching between carrier & mFSK-17
Perhaps 2 stations active in semi-duplex as the tones had a bit of an frequency offset
100Bd measured – 20kHz approx
Checked on the LPDA, seems to come from 110/140 deg, so middle east !?
Later the unid FSK 50/500 with ACF=127 & ACF=31 near EOT has been spotted on the same CF frequency, wonder if that was just a coincidence as the signal & fading were almost the same (also the sounding frames, tfc <> idle were quite identical)
Here are some screenshots:
And finally the 50/500 coming up: