Kenwood TS-820 manual If Shift, 9NOISE Blanker, AGC a U T O M a T I C Gain Control

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4.6RF ATT

If the transceiver is operated in a short-distance (within several ihundred meters) and strong signals of nearby fre- quencies are received. the wanted signals are blocked. Also. if the wanted signals are very strong. the S meter is scaled out. In this instance, set the ATT switch to ON. The input signals to the RF amplifier are attenuated by about 2 0 dB. providing distortionless reception.

4.7RIT

By uslng the RIT knob, the receive frequency of VFO can be shifted by about i 3 kHz and the frequency of fixed channel by about i 1 5 0 Hz without changing the transmit fre- quency. II the frequency of the opposlte station is deviated. your receive frequency can be set to the statton by turning the RIT switch to ON and using the RIT knob. The state of RIT can be checked bh the indicator in the window of the d~al .

4.8IF SHIFT

By using the IF SHIFT knob during reception, rhe pass band frequency of the crystal filter can be shifted by about il 7 kHz because of adoption of PLL (Phase Locked Loop) circuit in the local oscillator circuit. This is one of the major features of TS-820 and can be used in the following cases:

1.Adjustment of Tonal Quality and Interference Rejection during SSB Reception.

When the transceiver is used in USB mode, turn the IF SHIFT knob in the "+"direction and the lower frequen-

cies are cut out. Turning the knob in the direction cuts out the higher frequencies (these procedures are reversed for LSB mode). Adjust the knob so that the to- inal qual~tysuits your listening preference. The IF SHIFT knob is also effective in eliminating interference when the receive s~gnalsare superposed on nearby signals.

2. Adjustment of Tonal Quality during CW Operation

For detailed descriptions. refer to Section 4.13 "CW operation".

3.FSK IRTTY) Operation at 8 5 0 Hz Shift

For detailed descriptions. refer to Section 4.19 "RTTY operation".

4.9'NOISE BLANKER

The TS-620 has a sophzsticated built-in noise blanker des~gnedto reduce ingition type impulse noise. The noise blanker is particularly ~mportantfor mobile operation. When necessary, activate the noise blanker circuit by flipping the NB switch up.

4.10AGC ( A U T O M A T I C GAIN CONTROL)

Scl tlre AGC swirch to the position appropriate for the rece~veds~gnal. Generally for SSB reception set,the AGC s w t c h to SLOW, for CW reception set the AGC switch t o FAST, and for reception of a very weak signal the switch lnay be set to OFF.

4.11 TRANSMITTER T U N I N G

Connect the TS-820 to a 50 ohm dummy load or a 50 ohm antclxla with an SWR of less than 2 : 1 before making any transmitter adjustments. The life of the final tubes isdirectly related to the SWR of the antenna and to the length of tu- nlng periods.

Refer to Table 2 for the initial switch settings of the TS-820 for transmitting. Tune the main tuning knob t o the desired ol~eratiiigfrequency.

PLATE IDLING CURRENT (See Fig. 7)

T u r n lllc lnaln tuning knob to the desired operating Ire- quency w l t i i ~ nthe amateur band selected. Flip the stand-by switch to SEND and check that the plate current (IP) is 6 0 ma. I f the plate current is not correct. adjust the rear panel BIAS control for a correct 6 0 ma of idling current and return the stand-by switch to REC.

CAUTION: If the plate current is very much higher than 6 0 ma do not leave the stand-by switch on for more than a few seconds. Excessive plate current shortens the life of the fi- nal tubes.

DRIVE T U N I N G (See Fig. 8 )

Shift the METER switch to ALC and the MODE switch to TUN and peak the ALC reading (maximum meter deflection) with the DRIVE control. The stand-by switch is in the SEND posltion for adjustment.

NOTE: If there is no ALC reading indicated. increase the CAR control until there is an ALC reading.

PLATE TUNING (See Fig. 8 )

Turn the METER switch back t o IP, leave the MODE switch at TUN and flip the stand-by switch to SEND. Quickly adjust the PLATE control to dip the plate current (a minimum meter readlng). Return the stand-by switch t o REC.

NOTE: The TUNE position permits tuning of the final tank clrcuit at reduced power without danger to the tubes. With the MODE switch in the TUN position, the screen voltage of the finals is reduced t o approximately 50% and the keying circuit is shorted.

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Contents Operating Manual Contents Audio Input Impedance WWVMode Audio Output ImpedanceFeatures SectionUnpacking InstallationPower Connections Operation LocationExternal Speaker a N D HeadphonesKEY Rtty FS KANT AC OperationSuitable PTT Microphone Operating Controls Front View Panel@ Stand by Switch @ Meter Switch@ VFO Indicator @ ATT IndicatorC Switch VOX Switch@ N B Switch C Connector@! H. S W Heater Switch @ B a N D Switch@ Function Switch @ Power Switch@ Drive Knob Display Hold SwitchRear Panel View @ Plate KnobRear PAN EL Controls @ DC-DC Converter Connecting Hole External VFO Connector@ Remote Connector PIN FunctionReceiver T U N I N G Preliminary ProcedureOperating Instructions Reading the Operating FrequencyCalibrating the Fixed Channel a N D VFO Freciuencies Calibrating T H E FrequenciesRF G a l N Calibrating the T S 8 2 0 W I T H VFO-820AGC a U T O M a T I C Gain Control If Shift9NOISE Blanker 1 Transmitter T U N I N GALC Front Panel ControlsUP on 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 Operation9 Rtty Operation 6 Internal Cross Channel OperationMobile Operation Function TransmitOperation with a Phone Patch USE of Monitor SwitchSstv Slow Scan TV Operation Novice OperationTS-820 Block Diagram Transmitter Section Block D I a G R a MGeneral 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 Carrier Balance Adjustment if UNIT1 Adjustment of Transmitter SectionAdjustment of T R a N S M I T if Coil if a N D RF Units Neutralizing the Final StageTransmitter a N D Receiver Circuits TrolibleshootingGeneral Information 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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