1. PLL System, HF Band SSB/CW/RTTY Transceiver
This transceiver employs newly developed PLL (Phase Locked
Loop) circuit, covering 1.8 to 29.7 MHz (WWV 15 MHz) for
SSB, CW and RTTY operations.
2. Minimum Spurious and Excellent Overload and Crossmod.
The adoption of FET balanced type mixer, MOS FET and single
conversion system minimizes spurious during transmission and
assures excellent overload and cross- mod. characteristic
3. Built-in IF SHIFT Circuit
IF SHIFT circuit is built in the transceiver to shift IF
pass band without changing receive frequency. The circuit is
also called the "pass band tuning circuit". It allows you to
eliminate radio interference or set the receive frequency
characteristic to the desired bandwidth simply by
manipulating one control knob.
4. Built-in RF Processor
The unique speech processor uses a quick time constant at
455 kHz. Since this circuit is of RF type, it produces
little distortion and, unlike the clipper system, does not
deteriorate the tonal quality.
5. RF NFB
RF NFB from the transmit final stage to thp driver stage
improves the cross modulation distortion. The use of the
amplification type ALC further improves the quality of
6. Newly Designed Analog Dial
The combination of newly designed mono-scale and sub-dial
provides easy reading of frequencies. The adoption of a
circuit that is completely free from changes in carrier
frequencies permits accurate indication of frequencies on
one dial pointer.
7. Digital Display Dial
The digital dial of TS-820S indicates transmit and receive
frequencies using carrier, VFO and local oscillator signals
instead of converting VFO frequencies. Thus, accurate
frequencies can be read at all times at any band and any
Since the accuracy of frequencies is set up only by the 10
MHz standard oscillator, frequencies can be read accurately
up to 100 Hz order by calibrating the oscillator with WWV.
The green indication on the dial assures many hours of
8. D.H. (Display Hold) SWITCH
By pressing the D.H switch, the frequency read on the
digital remains on, thus serving as a memory system.
9. Rigid Structure and Easy Operation
The transceiver is built with a die casting front panel and
a rigid chassis, providing outstanding mechanical stability
for mobile operation. All the operating parts such as
control knobs and dials are designed and arranged according
to human engineering technology to ensure maximum case of
10. Monitor Circuit
The monitor circuit allows you to hear your own voice during
transmission, which is normally impossible with conventional
transceivers. This is very useful when checking the
modulation condition or adjusting the RF processor.
11. Selector Switch for SSB/CW Receive Frequency Response
During CW reception the audio frequency response is
automatically narrowed to improve the clarity of sound.
12. Build-in Fixed Channel Circuits with RIT (crystals are
The fixed channel circuits with RIT permit the use with the
built-in VFO for more enjoyable operation.
13. Transverter Connector
Transverter TV 502 (2m) can be connected for ready operation
Changeover to HF or VHF is accomplished automatically with
the power switch of the transverter.
14. .Built-in AC Power Supply, and DC Operation with
Optional DC-DC Converter
DC-DC Converter DS-1A (option) can be attached to the
transceiver for mobile operation.
15. Wide Variety of Auxiliary Circuits and Devices
The transceiver is completed with a noise blanker circuit,
VOX circuit, side tone circuit, marker circuit, built-in
speaker. 3-position AGC switch, heater switch, IF OUT
terminal and linear terminal.
The following devices are available as optional extra:
Remote VFO (VF0-820). CW Filter (YG-88C). Digital Display
(DG-1A), Transverter (TV-502S). Microphone (MC-50). Low Pass