Kenwood TS-820 manual Internal Cross Channel Operation, Mobile Operation, Rtty Operation

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The crystal frequency is determined by the following formu- las.

Cgystal Frequency (MHz) = 5.5 MHz + X - Operating Fre- quency [MHz)

X - 1.8 for the 160 meter band

X= 3 . 5 for the 8 0 meter band X = 7.0 for the 4 0 meter band X = 14.0 for the 2 0 meter band X = 21 . 0 for the 15 meter band

X= 28 . 0 for the 1 0 meter band or X = 28.5 for the 1 0 meter band or X = 29 . 0 for the 10 meter band or X = 29.5 for the 1 0 meter band

Crystal Specifications: HC-25/U holder. 5 . 0 to 5 . 5 MHz os- cillation frequency. and see Figure 9 for type of oscillation

circuit.

Example: Desired Operating Frequency = 7.255 MHz Crystal Frequency = 5.5 MHz + 7.0 MHz -

7 . 255 MHz = 5.245 MHz

This same crystal will operate on each band. Operating Frequency = 5.5 MHz + X (in MHz) -

Crystal Frequency (in MHz)

Example: Crystal Frequency = 5.245 MHz

On the 1 4 MHz band the crystal will oscillate at Operating Frequency = 5.5 MHz + 14.0 -

5 . 245 MHz

=14.255 MHz

4 . 1 6 INTERNAL CROSS CHANNEL OPERATION

The TS-820 contalns a unlque design feature which allows cross channel operation without a separate external VFO. The TS-820'sinternal VFO is used together with the fixed frequency osc~llaltort o allow reception and transmission on different frequencles. he fixed channel oscillator must have one or more accessory crystals installed for this feature t o work.

FUNCTION TRANSMIT

1

 

1

Fixed channel

V F O R

I

01cl1aIor

Fixed channel

Fixed channel

I

4 . 17 MOBILE OPERATION

The compact size and solid-state design of the TS-820 make it deal for mobile use, by using optional DS-1.

Be sure to use a mobile antenna which meets the require- ments described in Section 2.

The normal operating procedures. described previously, ap- ply ro mobjle operation. The noise blaker should be used to reduce ignition and impulse noises for clear reception. Re- member that during transmission the transceiver draws about 15 amps so be careful not to drain the car's battery.

4.18 DX OPERATION (Use of PROCESSOR)

In DX (long distance) operation, i t may be desirable t o in- crease the talk~powerby using the speech processor. The speech processor used in TS-820 converts voice signals into 4 5 5 kHz SSB signals for compression at quick time cons- tant.

It produces little distortion and, unlike the clipper system does not deteriorate the tonal quality.

The compression level can be adjusted with the COMP LEVEL k n o b Set the meter knob to COMP and adjust so- that the meter indicates anywhere within the scale (20

4 0 dB). The speech processor is used only for DX opera- tion. In other operations such as local QSO, press in the COMP LEVEL knob so that signals can be heard more natu- rally.

4 . 1 9 RTTY OPERATION

For RTTY operation, the use of demodulator and teletypewriter is essential The demodulator should be de- signed to operate from audio inputs and equipped with a fil- ter f o r - 2 1 2 5 / 2 2 9 5 Hz (NARROW. 1 7 0 Hz shift) or 2125/2975 Hz (WIDE. 8 5 0 Hz shift).

To key-in the FSK circuit of T S ~ 8 2 0 .insert a relay coil into the closed loop c~rcuitof teletypewriter and connect the re- lay contact to the RTTY KEY jack on the rear panel. Fig. 1 0 shows the relat~onshipbetween the transmit and receive fre- quenc~esof TS-820.

The frequency shift of the FSK clrcuit is preset at the factory to NARROW but it can bechanged to WlDE by inserting the connector as shown in Fig. 11. When operating at the WlDE posirion, turn the IF SHIFT knob in the " - " direction by about 1.2 kHz so that the mark and space signalsare well balanced during reception. If a CW filter (option) is used for NARROW operation. change the position of the connector of the IF unit (refer t o "Operation with CW Filter").

Setting the MODE switch t o FSK automatically decreases the input power of the final stage, permitting a long time of continuous operation.

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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 GFront Panel Controls ALCUP 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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