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SIMPLEX is a free windows program which transforms any transceiver into an audio repeater. It works on HF, VHF, UHF etc with SSB, CW, FM, packet, SSTV and every modulation mode.

RTTY SSTV PSK31 MFSK MT63 PACKET APRS and more...

SSTV and Packet Radio interfaces for PC and Amiga computers.