Kenwood TS-820 manual Section, Features

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1. PLL System. H F Band SSB/CW/RTlY Transceiver

This transceiver employs newly developed PLL (Phase Locked Loop) circuit. covering 1.8 to 29.7 MHr (WWV 15 MHz) for SSB, CW and RTTY ooerations.

2.M i n i m u m Spurious and Excellent Overload and Crossmod. Characteristic

The adoption of FET baianced type mixer. MOS FET and single conversion system minimizes spurious during transmission and assures excellent overload and cross- mod. characteristic during reception.

FEATURES

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checking the modulation condition or adjusting the RF processor.

9.Selector Switch for SSB/CW Receive Frequency Response

During CW reception the audio frequency response is automatically narrowed to improve the clarity of sound.

10. Build-in Fixed Channel Circuits w i t h RIT (crystals are optional)

The flxed channel circuits with RIT permit the use with the built-in VFO for more enjoyable operation.

3. Built-in IF SHIFT Circuit 11. Transverter Connector

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IF SHIFT circuit is built in the transceiver t o shift IF pass band without changing receive frequency. The circuit is also called the "pass band tuning circuit". I t allows you t o eiiminate radio interference or sei the receive fre- quency characteristic to the desired bandwidth simply by manipulating one control knob.

4.Built-in RF Processo~

The unique speech processor uses a quick time constant at 4 5 5 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 N F B

RF NFB from the transmit final stage t o t h e driver stage improves the cross modulation distortion. The use of the ampl~ficationtype ALC further improves the quality of transmit signals.

6.Newly Designed Analog Dial

The combination of newly designed mono-scale and su- b-dial provides easy reading of frequencies. The adop- tion of a circuit that is completely free from changes in carrier frequencies permits accurate indication of fre- quencies on one dial pointer.

7. Rigid Structure and Easy Operation

The transceiver is built with a die casting front panel and a rlgid chassis, providing outstanding mechanical stability for mobile operation. All the operating parts such as control knobs and dials are designed and arran- ged according t o human engineering technology t o en- sure maximum case of operation.

8.Monitor Circuit

The monitor circuit allows you to hear your own voice during transmission. which is normally impossible with conventional transceivers. This 1s very useful when

Transverter TV-502 (2m) can be connected for ready operation. Changeover t o HF or VHF is accomplished automatically with the power switch of the transverter.

12. Built-in A C Power Supply, and D C Operation with Optional DC - DC Converter

DC-DC Converter DS-1 (optton) can be attached to the transceiver for m o b ~ l eoperatlon

13. 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. healer switch. IF OUT terminal and linear terminal.

The following devices are available as optional extra: Remote VFO (VFO-820). CW Filter (YG-88C). Digitai Display IDG-1). Transverter (TV-502). Microphone (MC-50). Law Pass Filter (LF-30A).

14. Use of Digital Display Dial DG - 1 (option)

1)Digital Display Dial

The digital dial of TS-820 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 operating made.

Since the accuracy of frequencies is set up anly by the

1 MHz standard oscillator, frequencies can be read ac- curately up t o 1 0 0 Hz order by calibrating the 0S~illat0r with WWV.

The green indication on the dial assures many hours Of fatigueless operation.

2 ) 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.