A CAT/Digital Yaesu FT-897D. CAT Control and AFSK soundcard audio interfacing for the FT-897D (and FT_857) The CAT portion provides rig control from a PC, and the Digital portion connects the soundcard to rig audio.
Power (+13.8V) is provided on the FT-897D data port; the MAX-232 handles RS_232 Level conversion. Schematic.
APRS.