Kenwood TS-820 manual I N a L Stage Power Amplifier, Final Board

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VOX-VR B O A R D 1x54-1190-001

Three variable resistors. VOX GAIN. ANTI VOX and DELAY. are directly mounted on a printed circult board.

5V AVR B O A R D (OPTION1 1x43-1220-001

Thts is a 5V power stab~l~zerused for the counter unlt It uses IC to provlde rated voltage wlthout maklng any adjust- ments

MARKER 8 0 A R D 1x52-0005-011

The MARKER board holds the 1 0 0 kHz crystal oscillator 101) and a 2 5 kHz multivibrator 102 and 0 3 ) to produce marker signals at 2 5 kHz intervals to calibrate the TS-820. 0 4 amplif~esthe calibrator signal^

RECTIFIER B O A R D 1x43-1090-021

This board holds all of the diode rectillers for the power sup^ ply section of the transceiver. D l through D 4 rectlly the hlgh voltage. D 5 rectifies the 3 0 0 volt supply. D6 rectifies the 2 1 0 volt supply. D7 rectifies the 9 0 volt supply. and D 8 through D l 1 rectify the 13.8 VDC supply.

H V ( H I G H VOLTAGE) 8 0 A R D 1x43-1110-001

Thls voltage divider crrcuit s~lppllesa high voltage metering s~gnalfor the HV meter reading and also a low voltage screen source used in the TUN mode of 'operation.

INDICATOR B O A R D 1x54-1180-00)

Thls clrcult controls the light emitting diodes which indicate when the RIT circuit is on, when the fixed frequency oscilla- tor IS operating. or when the VFO is oscjllat~ng

RELAY B O A R D 1x43-1190-001

T h ~ sunit holds the stand-by relay. a 5V power stabilizer to feed power to the PLL circuit. and smoothing capacitors to obtain low voltage DC power.

The relay of thls unit 1s used to select OC signal for con- trolling block b~as,cross channel operation. etc

FINAL BOARD 1x56-12'00-00)

T h ~ sunit ~ncludesall the circuits of the power amplifier of the flnal stage wrth the exception of the pi~networkclrcuit at the output side.

Fig. 2 2 FINAL Board

5.3F I N A L STAGE POWER AMPLIFIER

Thjs ampl~f~erdeltvers 2 0 0 W PEP tnput by 2 transmli power tubes (S2001A) It is equlpped w ~ t ha cool~ngfan to avoid temperature rlse during operatton

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Contents Operating Manual Contents WWV ModeAudio Input Impedance Audio Output ImpedanceFeatures SectionInstallation Power ConnectionsUnpacking Operation LocationHeadphones KEYExternal Speaker a N D Rtty FS KANT AC OperationSuitable PTT Microphone Operating Controls Front View Panel@ Meter Switch @ VFO Indicator@ Stand by Switch @ ATT IndicatorVOX Switch @ N B SwitchC Switch C Connector@ B a N D Switch @ Function Switch@! H. S W Heater Switch @ Power SwitchDisplay Hold Switch Rear Panel View@ Drive Knob @ Plate KnobRear PAN EL Controls External VFO Connector @ Remote Connector@ DC-DC Converter Connecting Hole PIN FunctionPreliminary Procedure Operating InstructionsReceiver T U N I N G Reading the Operating FrequencyCalibrating T H E Frequencies RF G a l NCalibrating the Fixed Channel a N D VFO Freciuencies Calibrating the T S 8 2 0 W I T H VFO-820If Shift 9NOISE BlankerAGC a U T O M a T I C Gain Control 1 Transmitter T U N I N GUP on ALCFront Panel Controls 2 SSB O P E R a T I O N 3 C W O P E R a T I O N4 Operation W l T H a Linear Amplifier 5 Fixed Frequency Operation6 Internal Cross Channel Operation Mobile Operation9 Rtty Operation Function TransmitUSE of Monitor Switch Sstv Slow Scan TV OperationOperation with a Phone Patch Novice OperationTS-820 Block Diagram Block D I a G R a M GeneralTransmitter Section Receiver SectionBoard a N D Unit Coil Pack Board PLL Unit Counter Assy Unit Display Unit Option Display UnitAF AVR Board I N a L Stage Power Amplifier Maintenance and Alignment General InformationAccessories Installing the D C D C Converter IDSI b l Transverter TV-5021 Fixed Channel Crystal Installation Remote Connections Extension FeetAdjustment of Receiver Section Adjustment of Transmitter Section Adjustment of T R a N S M I T if Coil if a N D RF UnitsCarrier Balance Adjustment if UNIT1 Neutralizing the Final StageTrolibleshooting General InformationTransmitter a N D Receiver Circuits Receiver SectionSymptoms Transmitter SectionTOP & Bottom View of the TS-820 FANPage IO--KENWOOD Corporation

TS-820 specifications

The Kenwood TS-820 is a high-performance amateur radio transceiver known for its exceptional features and technologies that cater to both novice and experienced operators. This rig, part of Kenwood's renowned TS series, has become a popular choice for those seeking reliability and versatility in their communication equipment.

One of the defining characteristics of the TS-820 is its dual-conversion superheterodyne receiver architecture. This design minimizes interference and provides improved performance across various amateur radio bands. With coverage from 160 meters to 10 meters, the TS-820 is capable of operating on all major HF amateur bands, making it an excellent choice for diverse communication purposes.

In terms of power, the TS-820 delivers a solid output of 100 watts, ensuring that operators can make their presence known across the airwaves. The rig features a built-in automatic antenna tuner, which simplifies the setup process by matching the transmitter to various antenna types. This feature not only enhances signal clarity but also maximizes the station's efficiency.

Another standout feature of the TS-820 is its extensive digital signal processing (DSP) capabilities. The advanced filtering options help to eliminate noise and interference, allowing users to hear weaker signals more clearly and effectively. The IF filter selections can be adjusted to optimize reception under varying conditions, showcasing the rig's adaptability.

The user interface of the TS-820 is designed for both ease of use and functionality. The large, backlit display provides critical information at a glance, while the rotary controls offer tactile feedback, allowing operators to make precise adjustments quickly. Additionally, the rig supports various modes of operation, including SSB, CW, and RTTY, accommodating a wide range of communication preferences.

Built with durability in mind, the TS-820 utilizes high-quality components and construction techniques that ensure long-term reliability. Its rugged design can withstand the rigors of everyday use, making it a trustworthy companion for any amateur radio enthusiast.

In summary, the Kenwood TS-820 is a versatile and reliable amateur radio transceiver that stands out due to its superior performance, advanced technologies, and user-friendly features. With its robust design and comprehensive capabilities, the TS-820 continues to earn its place as a respected choice among ham radio operators around the world. Whether engaged in casual conversation or competitive contesting, enthusiasts can rely on the TS-820 for a satisfying and immersive amateur radio experience.
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