Kenwood TS-820 manual Calibrating T H E Frequencies, RF G a l N

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scale and the digital dial (option),the correct frequency is on the digital dial. In this case. the analog dial should be c a l i ~ brated with the calibrate knob.

NOTE: When the digital display is used, the dig~tsfor 10 MHz order change according to the BAND switch and are independent of the counter unit. In the 29.5 MHz band. for example. the indication "29999 . 9" is followed by "20000 . 0" .

Dial Reading 177 kHz

The operating frequency of the transceiver is the sum of the band

1rrqurncy and dial reading frequency

1 Crample Band switch 14 MHz

Ollerartng Frequency 14000 + 177 = 14177 kHz

Fig. 6 Reading the Operating Frequency

4.4CALIBRATING T H E FREQUENCIES

To read frequenc~escorrectly from the dial scale. the dial must be calibrated previously using a 2 5 kHz marker. To ca- librate, set the FUNCTION switch t o CAL-25 kHz and the RIT switch to OFF Turning the RF ATT switch t o ON redw ces the incoming signal and the marker signal can be recei- ved more easily. Detailed method of calibration is described below.

SSB

Set the MODE swltch to USB or LSB Markersvgnals are re- celved at every 2 5 kHz so accurate callbratlon 1s possible over the entlre range of the dlal

Wlth the lranscelver set t o your desired band. turn the main tunlng knob so that a beat signal can be received at every 2 5 kHz Turning this knob further will cause the beat signal to vary from high to low tone and finally become a zero beat. Accurate zero beat point is obtained by turning the IF SHIFT knoll in the " - "direction ifor USBI. and in the " I - "

direction (for LSB). Stop turning the knob at the zero beai point and rotate the dial calibrate knob alone while holdlng the main tuning knob until the dial pclnter indicates 0. 25. 50 or 7 5 on the dial.

The dial cal~brateknob is forced against the main tunlng knob by means of a spring permit slip rotation with ease.

Set the IF SHIFT knob to its center position. If CW filter i s not used. obtain a zero beat point of marker slgnal and turn the main tuning knob counter-clockwise until a beat signa! of about 800 Hz is received. While holding the main tuning knob. turn the dial calibrate knob so .that the dial pointer in^ dicates the colrect position on the dial.

When CW f~lteris used. turn the dlal when the marker signal casues maximum deflection on the S meter and then cali- brate using the dial pointer In this case. the beat frequency is about 8 0 0 Hz (CW ftlter Y G 8 8 C is optional extra].

CALIBRATING THE FIXED CHANNEL A N D VFO FRECIUENCIES

Flxed Channel and VFO frequencies can be calibrated at the CAL~FIXposition of the FUNCTION switch. Set the switch to the CAL~FIXposition and turn the VFO main tuning knob u n t ~al beat signal is received in the vicinity of f~xedchanne! frequency. Calibration is effected at the zero beat pos~tion.

CALIBRATING THE T S - 8 2 0 W I T H VFO-820

Turn the FUNCTION switch to CAL-RMT to calibrate [ h i TS - 820 with the VFO-820, a receiver. or another remotr VFO. Tune the remote VFO to the frequency selected on t h ~ 7 5 ~ 8 2 0and zero beat the generated marker signal. At zerc beat. the TS-820 and remote VFO frequencies coincide.

By calibrating the TS-820 for normal operation. as describe; previously, the TS-820 can be used as a frequency standarci for calibrating the remote VFO.

4.5RF G A l N

RF GAlN is controlled by changing the voltage of the AGC c~rcu'itAdjust. the RF'GAINknob so that the S meter doe: not cause excessive deflection. This minimizes the noise du ring reception and allows the S meter to indicate the correc! signal strength. For normal operation. this knob should be turned fully clockwise for maximum sensitivity.

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Contents Operating Manual Contents Mode WWVAudio Input Impedance Audio Output ImpedanceSection FeaturesPower Connections InstallationUnpacking Operation LocationKEY HeadphonesExternal Speaker a N D Rtty FS KAC Operation ANTSuitable PTT Microphone Front View Panel Operating Controls@ VFO Indicator @ Meter Switch@ Stand by Switch @ ATT Indicator@ N B Switch VOX SwitchC Switch C Connector@ Function Switch @ B a N D Switch@! H. S W Heater Switch @ Power SwitchRear Panel View Display Hold Switch@ Drive Knob @ Plate KnobRear PAN EL Controls @ Remote Connector External VFO Connector@ DC-DC Converter Connecting Hole PIN FunctionOperating Instructions Preliminary ProcedureReceiver T U N I N G Reading the Operating FrequencyRF G a l N Calibrating T H E FrequenciesCalibrating the Fixed Channel a N D VFO Freciuencies Calibrating the T S 8 2 0 W I T H VFO-8209NOISE Blanker If ShiftAGC a U T O M a T I C Gain Control 1 Transmitter T U N I N GUP 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 AmplifierMobile Operation 6 Internal Cross Channel Operation9 Rtty Operation Function TransmitSstv Slow Scan TV Operation USE of Monitor SwitchOperation with a Phone Patch Novice OperationTS-820 Block Diagram General Block D I a G R a MTransmitter Section Receiver 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 Adjustment of T R a N S M I T if Coil if a N D RF Units Adjustment of Transmitter SectionCarrier Balance Adjustment if UNIT1 Neutralizing the Final StageGeneral Information TrolibleshootingTransmitter a N D Receiver Circuits Receiver SectionTransmitter 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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