Note
QST, Sep 1977, p. 121.
QST, Jan 1980, p. 7.
QST, Mar 1981, p. 1.
QST, Mar 1982, p. 121.
The demodulator features a hard-limiting front end, active filter discriminator, and active detector circuitry for wide dynamic range. Autostart and motor control circuitry make for easy VHF and HF autostart operation.
Front panel switches are provided for 850 and 170 Hz shift, normal or reverse sense, autostart on/off, print - line or local, and power on/off. 425 Hz press transmissions may also be copied with the ST-5000. High voltage 60 ma. loop output as well as low level RS-232 compatible output are provided by the demodulator.
The audio keyer section of the ST-5000 generates stable, phase-coherent audio tones. Transmission is a simple matter of applying these tones to your HF SSB or VHF FM transmitter.