Kenwood TS-820 VOX Switch, Man, Vox, @ N B Switch, C Switch, @ Phones J a C K, C Connector, Tun

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VOX SWITCH

This two-position lever switch seiects one of the following

functions.

MAN:

With the switch in this position. the transceiver is

 

switched into transmit or receive by the stand-by

 

switch or the PTT switch on the microphone.

VOX:

With the switch in this position. the VOX circuit is

 

turned on for voice operated transmit on SSB se-

 

mi-automatic break-in operation on CW.

@N B SWITCH

The NB switch turns the built-in noise blankercircuit on and off. The noise blanker is designed to reduce pulsating igni- tion type nolses. When the lever switch is flipped up. the c~rcuitis turned on.

M O N l (MONITOR) SWITCH

This switch is used t o demodulate part of the output of the transmit IF amplifier for monitoring transmit signals.

A G C SWITCH

The AGC switch controls the AGC (Automatic Gain Control) c~rcuitgiving the operator three choices:

OFF It may be desirable to turn the AGC off when re- celv~nga very weak s~gnal

FAST: The FAST AGC position is designed for use in CW operation.

SLOW: Use the SLOW AGC position for SSB operation.

@PHONES J A C K

The headphones jack allows use of a 4 t o 16 ohm set of headphones wlth a 1/4" phone plug attached When the phones are plugged Into the transceiver. the speaker 1s dls- connected

M I C CONNECTOR

The microphone connector is four pronged. allowing use of the PTT microphone. Figure 2 shows how to wire the p!ug on the microphone cable,

@M O D E SWITCH

The MODE switch is used for selection of type of waves or for TUNE o~eration .

TUN:

Used for adjustment of transmit conditions. The

 

input power to the final stage is low as compared

 

with that for CW so that the final stage tube,s can

 

be protected against damage due lo overloading

 

during adjustment. Since the KEY circuit is ino-

 

perative in the TUN mode. the transceaver cannot

 

be used for transmission or reception.

CW:

Used for CW operation

USB:

Used for USE operation. It is internationally de-

 

termined Chat the 14. 21 and 28 MHz bands be-

 

long to USE.

L S B

Used for LSB operation. It is internationally d e ~

 

termined that the 3.5 and 7 MHz bands belong to

 

LSB.

FSK:

For RTTY operation with teletypewriter

@C O M P LEVEL K N O B

Pull this knob during SSB operation. The speech processor is activated and the talk-power is increased. Adjust the state o f compression by turning the knob while observing the COMP meter.

@) DELAY KNOB

The DELAY control adjusts the holding time of the VOX cir- cuit for VOX or break-in CW operation. The control will have to be adjusted t o the preference of the indtvidual operator.

@ANTI VOX K N O B

This control adjusts the level of the anti VOX slgnal fed in to the VOX circuit. Adjust the control to prevent feedback of the speaker from tripping the VOX circuit.

@VOX G A I N KNOB

This control adjusts the sensitivity of the VOX circuit by ad- justing the gain of the VOX amplifier. for voice controlled operation.

@R F ATT SWITCH .

With this switch set to ON. ATT (attenuator) of about 2 0 dB is connected to the antenna circuit. protecting the RF ampli- fier and mixer circuit from strong input signals.

@RIT SWITCH

This is the switch for the RIT (receiver incremental tuning1 ctrcuit. To turn on the circuit. press this switch: to turn off. press it once again. The RIT indicator is illumanated when

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Contents Operating Manual Contents Audio Output Impedance WWVMode Audio Input ImpedanceSection FeaturesOperation Location InstallationPower Connections UnpackingRtty FS K HeadphonesKEY External Speaker a N DAC Operation ANTSuitable PTT Microphone Front View Panel Operating Controls@ ATT Indicator @ Meter Switch@ VFO Indicator @ Stand by SwitchC Connector VOX Switch@ N B Switch C Switch@ Power Switch @ B a N D Switch@ Function Switch @! H. S W Heater Switch@ Plate Knob Display Hold SwitchRear Panel View @ Drive KnobRear PAN EL Controls PIN Function External VFO Connector@ Remote Connector @ DC-DC Converter Connecting HoleReading the Operating Frequency Preliminary ProcedureOperating Instructions Receiver T U N I N GCalibrating the T S 8 2 0 W I T H VFO-820 Calibrating T H E FrequenciesRF G a l N Calibrating the Fixed Channel a N D VFO Freciuencies1 Transmitter T U N I N G If Shift9NOISE Blanker AGC a U T O M a T I C Gain ControlUP on ALCFront Panel Controls 3 C W O P E R a T I O N 2 SSB O P E R a T I O N5 Fixed Frequency Operation 4 Operation W l T H a Linear AmplifierFunction Transmit 6 Internal Cross Channel OperationMobile Operation 9 Rtty OperationNovice Operation USE of Monitor SwitchSstv Slow Scan TV Operation Operation with a Phone PatchTS-820 Block Diagram Receiver Section Block D I a G R a MGeneral Transmitter SectionBoard a N D Unit Coil Pack Board PLL Unit Counter Assy Unit Display Unit Display Unit OptionAF AVR Board I N a L Stage Power Amplifier General Information Maintenance and AlignmentInstalling the D C D C Converter IDS AccessoriesI b l Transverter TV-5021 Remote Connections Extension Feet Fixed Channel Crystal InstallationAdjustment of Receiver Section Neutralizing the Final Stage Adjustment of Transmitter SectionAdjustment of T R a N S M I T if Coil if a N D RF Units Carrier Balance Adjustment if UNIT1Receiver Section TrolibleshootingGeneral Information Transmitter a N D Receiver CircuitsTransmitter Section SymptomsFAN TOP & Bottom View of the TS-820Page 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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