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The Yaesu FT-990 HF transceiver providing up to 100 Watts power output in CW, SSB, FM, RTTY and Packet modes, and up to 25 Watts in AM mode. The receiver tunes between 100 kHz and 30 MHz in 10 Hz steps. Low noise front-end, five IF filters, IF shift and notch, dual tunable AF switched capacitance filter (SCF), DDS synthesizer, separate receive-only antenna jack,one-touch band selection. An automatic antenna tuner and Iambic keyer are built-in.
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The Yaesu FL-7000 high performance linear amplifier covers 160 to 15 meters including the WARC bands, providing up to 1200 watts RF input power. Power: 1200W PEP (SSB), 1200W DC (CW), 600W DC (FSK) and 550 W DC carrier (AM). Super fast T/R turnaround timing allows the FL-7000 to be used for QSK CW and HF packet radio. It requires only 70 watts of excitation for full output. Band changes are automatic with digital band data output of the FT-990. Supply voltage: 100/110/117/200/220/234 VAC 1900 VA max. (390x130x400mm) 66 lbs. (30kg).
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The Hal Communication Model ST-5000 is a high-performance frequency shift keying (FSK) demodulator and tone keyer designed for use with radio teletype systems. The ST-5000 is an audio tone type of demodulator and keyer. Audio tones from a radio receiver, representing the “mark” and “space” teletype code states, are converted into keying pulses by the demodulator section. Active discriminator filters are used so that a wide range of input frequencies can be accommodated. The standard tone set is based on the mark frequency of 2125 HZ and space frequency of 2295 for a frequency shift of 170 HZ the standard configuration for today’s teletype equipment.
The tone keyer section of the ST-5000 generates the same set of tones for transmitting. The demodulator uses a wide bandwidth limiter and active detector circuit to give outstanding performance for a wide range of input signal amplitudes. A three-pole active lowpass filter follows the detector stages to reduce the post-detection noise bandwidth. An AutoStart circuit senses the presence (or absence) of a valid teletype signal. When a valid teletype signal is recognized the AutoStart circuit turns on the teletype motor and starts typing the message on the teleprinter. If the input signal is loss or not recognized as a valid teletype signal, the teletype is held in a “mark hold” (non-typing) condition. If more than twenty seconds pass without recognition of a valid signal, the power to the teletype motor is shutdown.
An mentioned earlier, the tone keyer generates the same tones set as is used in the demodulator section to assure true transceiver conditions. All tones of the tone keyer are derived by a tuned oscillator build around a NE 555 timer. The output signal is a low distortion sinewave generated in a digital-to analog converter and filtered in an active low-pass filter.
My ST-5000 is connected to my FT-990 which is set to monitor HF frequency 14.086 MHZ. The receiver audio output(AF)is fed directly to the ST-5000. When a valid teletype(RTTY) signal is received, the ST-5000 which is setup in autostart mode will turn on my printer(KSR) and print the message. It's a great system which I enjoy very much.
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The Hal Communication Model ST-6000 is a high-performance frequency shift keying (FSK) demodulator and tone keyer designed for use with radio teletype systems.
The ST-6000 is an audio tone type of demodulator and keyer. Audio tones from a radio receiver, representing the “mark” and “space” teletype code states, are converted into keying pulses by the demodulator section. Active input and discriminator filters are used in the ST-6000 so that a wide range of input frequencies can be accommodated. Two standard audio tone sets are normally stocked by the factory. These standard tone sets are based on the mark frequency of 1275 HZ ("low-tone" set) or a mark frequncy 2125 HZ ("high tone" set) for a frequncy shift of 170 HZ, 425 HZ, or 850 HZ. Most radio teletype users of today use mark high tone set. The tone keyer section of the ST-6000 generates the same set of tones for transmitting.
The demodulator uses a pre-filter automatic gain control (agc) system, an active bandpass filter, a high gain, wide bandpass limiter, and active detector circuits. This combination gives outstanding performance for a wide range of input signals aplitudes even in the face of strong interfering signals. The limiter stage gain can be reduced for non-limiting operation ("AM"). The pre-filter agc and active filter detectors also assure improved non-limiting performance when compared to previous demodulators. A three-pole active lowpass filter follows the detector stages to reduce the post-detection noise bandwidth.
An Automatic Threshold Correction (ATC) circuit can be switched into the signal chain to provide correction for bias distortion generated by the propagation path. This feature can also be defeated with a front panel switch if desired. A Decision Threshold Hysteresis (DTH) circuit can also be switch selected to provide correction for muti-path propagtion distortion of the teltype signal.
A CMOS digital circuitry is used to provide the automatic teleprinter and motor control as well as the antispace feature. The ST-6000 autostart cicuit senses the presence (or absence) of a valid teletype signal. If the input signal is not recognized as a valid teletype signal, the printer is held in a "mark-hold" condition. If more than twenty seconds pass without recogination of a valid signal, the power to the printer motor is removed. The response time of the autostart circuit is switch selectable to allow "FAST" (1.5 sec) or "SLOW" (3.5 sec)response. An antispace circuit is also included in the digital control section that limits the duration of the space signal to 250 ms or less, preventing the "running-open" machine. condition on continous space tones.
As mentioned earlier, the tone keyer section generates the same tone set as is used in the demodulator section to assure true “transceive” conditions. All tones are derived from high frequency crystal-controlled oscillators. The output signal is a low distortion sinewave generated in a digital-to-analog converter and then filtered in an active low-pass filter. A width range of output amplitude (into 500 ohms) is available from the ST-6000, adjustable with an internal control. Unlike previous demodulators, the tone keyer data input circuit is not internally connected to the demodulator but is available on the rear panel connector. Thus, separate transmit and receive circuits (full-duplex) can be accomplished by the ST-6000. Conversely, with appropriate rear-panel jumpers, the tone keyer can be connected to the demodulator for a common transmit – receive circuit (half-duplex). However, the shift of the tone keyer is controlled by the front panel SHIFT switched. Also, the SENSE switch (NORM – REV) controls both the tone keyer as well as the demodulator.
The ST-6000 input and output circuit have been designed to allow a maximum of user flexibility. Many signal and control lines have been brought-out to rear panel connections. Both pre- post AutoStart data signals are available on the rear panel as are the inputs and outputs of two separate high-level loop switches. The internal 175-volt, 60 ma loop supply is also connected to the rear panel. Thus, the demodulator output can be used to directly key the loop or be first to passed through additional signal processing (such as the popular UART and digital control devices), and routed back through the ST-6000 keyer stages, with the option of using or not using the internal loop supply of the ST-6000. In addition, the ST-6000 has both input and output signal connections that are compatible with both the EIA-RS232C and MIL-STD-188C data signal levels.
The ST-6000 also includes a Keyboard Operated Switch (KOS) circuit that can be used to automatically switch the transmit – receive control circuitry of a transceiver. The KOS circuit senses teleprinter keyboard signal status. If the keyboard is used, the KOS switching transistor turns “ON” (low-impedance to ground). The KOS circuit also places the ST-6000 demodulator circuit in a “standby” status to prevent feedback from the receiver while transmitting. The NPN KOS switching transistor can be used to control a DC relay that is supplied from the voltage source or a push-to-talk PTT) control line in a transmitter (providing the PTT line is derived from a positive DC source). Since the KOS sensing line is connected to the rear panel, it can also be trigged by external devices.
My ST-6000 is connected to a second FT-990 transceiver and my automatic send and receive(ASR) which I used as my "heavy metal" teletype station.
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Ham radio Deluxe is an amateur radio software suite. It includes most everything an amateur radio operator needs to automate their ham radio station.
The Ham Radio Deluxe Software Suite includes five modules:
. HRD Logbook, is a feature ham radio logging software with powerful features for QSO logging, awards tracking, DX cluster, QSL card printing, integrated to rig control, and a lot more. It can upload your QSO to logbook of the World (LOTW), eQSL.cc, HRDLog.net, Clublog, and QRZ Log. Automatic callsign lookup from QRZ callsign database (XML or CD), Hamcall (or CD)
. HRD Rig Control, is a ham radio control software program for ham radios that has the appearance of being connected to a software defined radio (SDR); HF, VHF, UHF, radio control for all major radio manufacturers; integrated to QSO logging.
. DM-780 is a digital modes software program that includes RTTY, PSK31. Morse code, send/receive, and many more, integrated to QSO logging. Modes include CW, RTTY, PSK, QPSK, Contestia, DominoDX, MFSK, MT63, Olivia Thor, and Throb. Control an unlimited number of transceivers, transmitters, or receivers simultaneously. DM-78- uses the same automatic callsign lookup that HRD logbook uses.
. HRD Rotor Control is a software program that supports most popular rotator controllers; turn automatically within logbook; world map display.
. HRD Satellite Tracking is a software program the makes your 2-way satellite communications much easier and includes integrated rig control.