Kenwood TS-820 User Manual

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OPERATING

MANUAL

CONTENTS

-3

TS-820 SPECIFICATIONS

SECTION SECTION 2 INSTALLATION

2.1 Unpacking

2.2 Operation Location

2.3 Power Connections

2.4 Antenna

2.5 Microphone

2.6 Key

2.7 External Speaker and Headphone 4.21 Operation with a Phone Patch

2.8 RTTY (FSK) 4.22 Use of Monitor Switch

2.9 Ground 4.23 Novice Operation

SECTION

3.1 Front Panel Controls

3.2 Rear Panel Controls 5.1 Block Diagram

SECTION

4.1 Preliminary Procedure

4.2 Receiver Tuning SECTION 6 MAINTENANCE AND ALIGNMENT.

4.3 Reading the Operating Frequency 6.1 General Information

4.4

4.5

4.6 RF ATT

4.7

4.8 IF Shift

4.9 Noise Blanker

4.10 AGC (Automatic Gain Control)

FEATURES

OPERATING

OPERATING INSTRUCTIONS 16

Calibrating the Frequencies RF GAIN

RIT

...........

....

CONTROLS

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TS-820 SECTION 5

SECTION 7

TOP and BOTTOM VIEW OF THE TS-820

SCHEMATIC DIAGRAM

Transmitter Tuning

SSB Operation CW Operation Operation with a Linear Amplifier Fixed Frequency Operation Internal Cross Channel Operation Mobile Operation

DX Operation (Use of Processor) RTTY Operation SSTV (Slow Scan

BLOCK

5.2 Board and Unit

5.3 Final Stage Power Amplifier

6.2 Accessories

6.3

6.4 Adjustment of Transmitter Section

DIAGRAM

CIRCUIT DESCRIPTION

Adjustment of Receiver Section

TROUBLESHOOTING

TV)

Operation

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24 25

40 42

t....

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TS-820 SPECIFICATION

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......%..............S

FREQUENCY RANGE

MODE POWER REQUIREMENTS

PLATE POWER INPUT

AUDIO INPUT IMPEDANCE AUDIO OUTPUT IMPEDANCE AUDIO OUTPUT

RF OUTPUT IMPEDANCE FREQUENCY STABILITY

AUDIO FREQUENCY RESPONSE CARRIER SUPPRESSION

SIDEBAND SUPPRESSION IMAGE RATIO

HARMONIC RADIATION Better than 40 db down from output signal

SPURIOUS RADIATION

IF REJECTION RECEIVER SENSITIVITY

=.RECEIVER SELECTIVITY

TUBE AND SEMICONDUCTOR

COMPLEMENT

DIMENSIONS

WEIGH 37.4 lbs.

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160 meter band

80 meter band 40 meter band 20 meter band

15 meter band 10 meter band - 28.00 to 28.50 MHz

1.80 to 2.00 MHz

3.50 to 4.00 MHz

7.00 to 7.30 MHz

14.00 to 14.35 MHz

21 .OO to 21.45 MHz

(A)

10 meter band - 28.50 to 29.00 MHz (E) 10 meter band - 29.00 to 29.50 MHz (Ci 10 meter band - 29.50 to 29.70 MHz (Dl

WWV

15.0 MHz (;eceive only)

USE. LSB, or CW. FSK

Receive

Trilnsmit

,20/220VAC,

200watls

160

wafts

100

watts

120/220

PEP

for

50/60

for

SSB

for

FSK

operation

VAC.

watts

waftslheaterr

280

waxti

operation

50/60

lheaterr

lmaximum!

operation

an!

off!

120walls

warts

wafts

13BV

DC PEP DC

for

operarion

for

FSK

06A

15A

SSB

operatian

operslion

operafion

DC'operslion

lheatersanl (heaters

lrnaxirnuml

off)

50 k ohms (high impedance) 4 to 16 ohms (speaker or headphones) More than 1.5 watts (with less than 10% distortion) into an 8 ohm load. 50 - 75 ohms

Within 100 Hz during any 30 minute period after warmup Within

kHz during the first hour after 1 minute of warmup

400 to2600 Hz, within -6 db Carrier better than 40 db down from the output signal

Unwanted sideband is better than 50 dbdown from the output signal

Image frequency better than 60 db (50 db for 10 meter band) down from the

output signal

Better than 60 db down from output signal (without spurious radiation) IF frequency is 80 db or more down from output signal 025gVSf

N/N

10dbormore

SSB: 2.4 kHz bandwidth 1-13 db down)

4.4 kHz bandwidth

CW*: 0.5

1.8 kHz bandwidth

kHz bandwidth (-6 dbdown)

(with optional CW filter installed)

1-60 db down)

(-60 db down)

3 Tubes

IC's 30 FET's 74 Transistors

167 Diodes

13.2" wide x 5.9"high X 13.2" deep

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1. PLL System. HF Band SSB/CW/RTlY Transceiver

This transceiver employs newly developed PLL (Phase

Locked Loop) circuit. covering 1.8 to 29.7 MHr (WWV

MHz) for SSB, CW and RTTY ooerations.

2. Minimum Spurious and Excellent Overload

and Crossmod. Characteristic

The adoption of FET baianced type mixer. MOS FET and single conversion system minimizes spurious during transmission and assures excellent overload and

mod. characteristic during reception.

Built-in IF SHIFT Circuit

IF SHIFT circuit is built in the transceiver to shift IF pass band without changing receive frequency. The circuit is

also called the "pass band tuning circuit". It allows you to eiiminate radio interference or quency characteristic to the desired bandwidth simply

by manipulating one control knob.

Built-in RF Processo~

The unique speech processor uses a quick time constant at 455 kHz. Since this circuit is of RF type. it produces

little distortion and. unlike the clipper system, does not

deteriorate the tonal quality.

RF NFB

RF NFB from the transmit final stage

improves the cross modulation distortion. The use of

ampl~fication type ALC further improves the quality

the

of transmit signals.

Newly Designed Analog Dial

The combination of newly designed mono-scale and

b-dial provides easy reading of frequencies. The adop-

tion of a circuit that is completely free from changes in

carrier frequencies permits accurate indication of fre-

quencies on one dial pointer.

7. Rigid Structure and Easy Operation The transceiver is built with a die casting front panel

and a stability for mobile operation. All the operating parts

such as control knobs and dials are designed and arranged according to human engineering technology to ensure maximum case of operation.

Monitor Circuit The monitor circuit allows you to hear your own voice

during transmission. which is normally impossible with

conventional transceivers. This

,888

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rlgid chassis, providing outstanding mechanical

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SECTION

,,,,

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sei the receive fre-

tothe driver stage

1s very useful when

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cross-

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FEATURES

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10. Build-in Fixed Channel Circuits with RIT

11. Transverter Connector

12. Built-in AC Power Supply, and DC Operation with

13. Wide Variety of Auxiliary Circuits

14.

,,,,

..,

,,,,

,.#,,,,,.#,,,,,.<,,,,,

checking the modulation condition or adjusting the processor.

Selector Switch for SSB/CW Receive

Frequency Response During CW reception the audio frequency response is

automatically narrowed

(crystals are optional) The

flxed channel circuits with RIT permit the use with

the built-in VFO for

Transverter operation. Changeover to HF or VHF is accomplished automatically with

Optional DC-DC Converter

DC-DC Converter DS-1

transceiver for

and Devices

The transceiver is completed with a noise blanker

circuit. VOX circuit, side tone circuit. marker circuit. built-in speaker. IF OUT terminal and linear terminal. The following devices are available as optional extra: Remote VFO Display (MC-50). Law Pass Filter (LF-30A).

Use of Digital Display Dial DG-1 (option) Digital Display Dial

The digital dial of TS-820 indicates transmit and receive

frequencies using carrier. VFO and local oscillator signals instead of converting VFO frequencies.

accurate frequencies can be read at all times at any band and any operating made. Since the accuracy of frequencies is set up

1 MHz standard oscillator, frequencies can be read accurately up to 100 with WWV. The green indication on the dial assures many hours Of fatigueless operation.

DH (display hold) Switch

By pressing the digital remains on, thus serving as a memory system.

TV-502 (2m) can be connected for ready

mob~le operatlon

(VFO-820). CW

IDG-1). Transverter (TV-502). Microphone

.,,,,,

,.,

,,,,

......................

to improve the clarity of sound.

more enjoyable operation.

the power switch of the transverter.

(optton) can be attached to the

3-position AGC switch. healer switch.

order by calibrating the 0S~illat0r

DH switch. the frequency read on the

....................

(YG-88C). Digitai

Filter

.,,,,,

anly

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Thus.

the

SECTION

2.1

UNPACKING

Remove the TS-820 from its shipping box and packing material and examine it for visible damage. has been damaged in shipment. save the boxes and packing material and notify the transportation company immedia-

tely. It is a good idea to save the boxes and packing material

in any case because they are very useful for shipping or mo-

ving the equipment.

The following accessories should be included with the transceiver:

1 Operating Manual 1 Microphone Plug 1 Jumpered 9-pin Plug

5 RCA Phono Plugs

Alignment Tool

2 Plastic

4 Fuse

2.2

Extension Feet with Screws AC Power Cord Speaker Plug 8P US Plug

(6A x 2. 4A x 2)

OPERATION LOCATION

(~nstalled)

If the equipment

INSTALLATION

ve. and between 15 and 200 ohms wfll take ~ower from the transceiver with little difficulty. transmission line is used with the antenna. a suitable antenna tuner is recommended between the transceiver and the feed tuners are book. and similar publications. For operation on 75 and 40 meter bands. a simple dipole antenna. cut to resorlance in the most used portion of the bands. will perform rily For operation of the transceiver on the 10. 15. and 20 meter bands. the efficiency of the station will be greatly increased if a sood directional member that even the most powerful transceiver is useless without a proper antenna.

Mobile since any mobile antenna for use on the high frequency bands represents a number of compromises. Many amateurs lose the efficiency of their antenna through improper tuning. Remember the following points when using the TS-820 with a mobile antenna.

The possible, There are several commercial models available which use high

If openwire or balanced type

llne Methods of construction and operating such

descr~bed in detail in the ARRL Antenna Hand-

satisfacto-

Statlon - Mobile antenna installations are critical.

"Q"

of the antenna loading coil should be as high as

"0"

coils.

rotary antenna is used. Re-

As with any solid state electronic equipment the TS-820 should be kept from extremes of heat and humidity. Choose an operating location that is dry and cool, and avoid operating the transceiver in direct sunlight. Also. allow at

least and any object. This space allows an adequate air flow from the ventilating fan to keep the transceiver cool.

2.3

TS-820 is turned off, the stand-by switch is put in the REC position. and that the voltage switch on the back of the TS-820 is switched to the correct line voltage Connect the POWER cord to an appropriate external power source.

2.4

Connect a 50 - 75 ohms antenna connector on the rear panel.

Fixed Station gned for use on the high frequency amateur bands may be used with the transmission line is not outside the capability of the

put matching network. the coaxial cable type. An antenna system which shows a standing wave ratio of less than 2 ohm coaxial transmission line, or a system that results in a transmission line input impedance that is essentially

inches clearance between the back of the equipment

POWER CONNECTIONS

Make sure the POWER switch on the front panel of the

(1 20 or 220).

ANTENNA

feediine to the coaxial

Any of the common antenna systems desi-

TS-820. provided the input impedance of the

PI-out-

The transmission line should be of

when using 50 or 75

resisti-

The loading coil must be capable of handling the power of the transceiver without overheating. power output of the transceiver will exceed 80 watts.

The SWR bridge is a useful instrument, but unfortunately it is quite often misunderstood. and overrated in importance. Easically. the SWR bridge will indicate how closely the antenna load impedance matches the transmission line. With long transmission lines. such as will be used in many fixed station installations. it match fairly close in order to limit power loss. This is particularly true at the higher frequencies. The longer the and the higher the frequency, the more important SWR becomes However. in mobile installations the transmission line seldom exceeds 20 feet in length, and an SWR of even 4 to 1 adds very little power loss. The only rime SWR will indicate a low figure is when the antenna presents a load close the 50 ohms, but-many mobile antennas will have a

nmpedance as low as 15 or 20 ohms at their resonant

base frequency.

and yet the system will be radiating efficiently.

The really important factor in your mobile antenna is that is should be carefully tuned to resonance at the desired frequency. The fallacy in using an SWR bridge lies in the fact that it is sometimes possible to reduce the SWR reading by detuning the antenna. Field strength may actually be reduced in an effort to bring SWR down. Since field strength is the primary goal, we recommend a field strength meter for antenna tuning.

In such a case. SWR will indlcate 3 or 4 to 1.

isdesirable to keep the impedance

In the CW mode the

he.

For antenna adjustments. the lightly, using the TUN position instead of operating at full

power output. This will limit tube dissipation during adjust-

ments. and will also help to reduce interference on the frequency. long at one time. Turn load. and get a field strength reading. Start out with the antenna whip at about the center of its adjustment range. Set the VFO to the desired operating frequency and then adjust the PLATE control for a dip. and then the LOAD control. Then observe the field strength reading. The field strength meter may be set on top of the dash, on the hood, or at an elevated location some distance from the car.

Change the whip length a half inch. or so at a time. retune the finals each time. and again check the field strength at the antenna. Continue this procedure until the point of maximum field strength is found. This adjustment will be most critical on 75 meters, somewhat less critical on 40. until on

10 meters the adjustment will be quite broad. After tuning the antenna to resonance. the finals can be loaded to full power.

In any case, do not leave the transmitter on for very

transceiver

on just long enough to tune and

may be loaded

The standard microphone sensitivity is within the range of

50 dB to -60 dB. If a microphone having a higher sensitivity is used. the ALC circuit will not function properly. this case, insert an attenuator as shown in the illustration at

right or connect a resistor with the capacitor 100 (X48-1150-00) of the transceiver.

MIC

2.6

KEY

operation isdesired, connect a key to the KEY jack.

2.7

EXTERNAL SPEAKER AND

(10k - 33k ohms) in parallel

pF (C94) in the IF unit

TS 820

MIC

Connector

HEADPHONES

2.5

MICROPHONE

Attach the microphone connector to a suitable microphone

as shown in Figure 2. crophone is separate from the microphone circuit, as shown in Figure 3.

It should be noted that a microphone with a 3P plug having

a common earth terminal cannot be used.

The microphone input is designed for high impedance

ohms) microphones only. The choice of microphone is important for good speech quality. and should be given serious consideration. The crystal lattice filter in the transceiver provides all the restriction necessary on audio response. and further restriction in the microphone is not required.

more important to have a microphone with a smooth. flat re-

sponse throughout the speech range.

The microphone manufacture's instructions should be followed in connecting the microphone cable to the plug. With

many microphones. the push-to-talk button must be pressed to make the microphone operative. For feature may be disabled. if desired. by opening the micro-

phone case and permanently connecting the contacts which

control the microphone.

Besure that the PTT switch of the mi-

(50k

It is

PTT operation. this

Receive audio output from the TS-820 is 1.5 wattat 4 to 16 ohms The TS-820 has a built-in speaker. However. if an external speaker is desired for fixed station or mobile operation.

Simply connect it to the SPEAKER jack on the real panel. The speaker may be any good 8 ohm permanent magnet type in the 4 inch or large sire. The internal speaker is

disconnected when an external speaker is used. Headphones should also be 8 ohms impedance. When the headphones are connected to the front panel PHONES jack the speaker is disabled.

2.8

RTTY

(FS

For RTTY operation. connect a teletypewriter to the RTTY

KEY jack on the rear of the transceiver. Since this jack is

connected to the switching circuit for shifting frequencies. relay should be inserted in the closed loop of the teletypewriter for keying operation.

2.9

GROUND

So preventing to receive an electric shock. TVI and BCI.

select a good. effective bround for installation and then con-

nect an earthing wire to the backside of GND terminal.

a heavy earth line as big as possible. it is because short-line

wiring is regarded as most effective for operation.

use

VFO-820

ANT

MICROPHONE

HEADPHONE

1 (a)

Fig.

Connection

EXTERNAL

SPEAKER

~~~SEo LOOP

IMPORTANT-When

conllrm

8dentcal conneotor. The moorreot

1201220

VAC

Fig.

lhat

p~n wiring.

l(bl

wlrlng a new power plug.

the

pn numberng

rhe

pn numberng

!ransoelver

Power Plug Wiring

,he

new

oan

AC OPERATION

\he POWER

be damaged by

plug

seen

Fig.

frorn

the

cord.

Microphone Connection Wiring

(a)

Unsunlable

for

PTT aperailan.

Mcroplions

(b) Unsuitable

(c)

Suitable

Fig.

for

PTT operation

lor

PTT

operation.

Suitable PTT Microphone

switch

Swllch

Back Panel Jurnpered

Fig.

EXT

VFO Connection

Front

View

Panel

SECTION

OPERATING CONTROLS

3.1

FRONT PANEL CONTROLS

VFO INDICATOR

METER

The meter monitors six different functions. depending on

the position of the METER switch. In receive the meter is automatically an S-meter. The S-meter shows received signal strength on a scale of the meter function depends on the position of the METER switch. as described below.

METER SWITCH

The position of the METER switch determines the function

of the meter. The switch selects one of the following functions (see Section 4 for nominal meter readings):

ALC

P (Plate Current) - In this position the meter moni-

(Automatic Level Control) meter monitors the ALC voltage of the internal ALC circuit (or the ALC voltage feedback from a

linear amplifier operated in conjunction with the TS-820). For SSB operation the ALC reading for voice peaks should be within the indicated ALC

range of is made with the MIC control for the CAR control for CW.

tors the plate current of the final tubes. The me-

ter scale is calibrated from

the meter. The ALC voltage adjustment

0 to 40 db over S9. In transmit

In this position the

SSB and with

0 to 350 ma.

The VFO indicator is a

whenever the TS-820's internal VFO is controlling the transceiver's operation. The indicator is not lighted during fixed channel. or remote VFO. operation.

This light emitting diode is illuminated when the RIT circuit

is turned on, showing that the transmit and receive frequen-

cies may be different.

SUB-DIAL

The sub-dial is turned with the main tuning knob to select

the operating frequency of the transceiver. 50 kHz intervals from 0 - 500 kHz.

DlAL SCALE

The unique mono-scale permits direct reading of frequencies

over the range of 0 to 500 kHz graduated at 1 kHz inter-

vals Operating frequency can be obtained by adding the

frequency read on the dial to the frequency on the BAND switch.

DlAL CALIBRATE KNOB

This knob is used to calibrate the reading on the dial scale.

It should not be used for tuning purposes.

light emitting diode which illuminates

It is calibrated at

(MHz) indicated

RF:

COMP:

HV:

Thls indicator uses a light emitting diode. It is illuminated when the RF ATT switch is turned to ON.

The FIX whenever the controlling the transceiver's operation.

(Output Power)

nitors the relative output power of the transceiver. There is no meter scale for this position.

Normally the reading should be adjusted with the

RF VOLT control for a 2/3 scale meter reading,

This indicates the state of compression when the

speech processor is operated.

(High Voltage) tors the high voltage from the power supply. The meter scale is calibrated from 0 to 1000 volts.

ATT INDICATOR SEND: The TS-820 is'locked into the transmit mode in

FIX (FIXED CHANNEL OPERATION) INDICATOR

ind~cator is a lightemitting diode which illuminates

TS-820's internal fixed frequency oscillator is

In this position the meter mo-

In this position the meter moni-

0 to 10. indicating

MAIN TUNlG KNOB

Thls knob turns the VFO and dial scale to select the fre-

quency to be added to the band frequency to establish the

transceiver's

STAND-BY SWITCH

This two position lever switch selects one of the following

functions:

REC: The transceiver is receiving unless the micro-

operating frequency.

phone PTT switch is switched to transmit, or the VOX circuit is activated.

this

swttch position.

VOX SWITCH

This

two-position lever switch seiects one of the following

functions.

MAN:

VOX: With the switch in this position. the VOX circuit is

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.

turned on for voice operated transmit on SSB semi-automatic break-in operation on CW.

NB SWITCH

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 be protected against damage due lo overloading during adjustment. perative in the TUN mode. the be used for transmission or reception.

CW: Used for CW operation

USB: Used for

termined

long to

USE operation. It is internationally de-

Chat the

USE.

Since the KEY circuit is ino-

14.

transceaver cannot

and 28 MHz bands be-

tube,s can

The NB switch turns the built-in noise blankercircuit on and off. The noise blanker is designed to reduce pulsating ignition type c~rcuit is turned on.

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

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

OFF

FAST:

SLOW:

The headphones

headphones phones are plugged connected

nolses. When the lever switch is flipped up. the

MONl (MONITOR) SWITCH

AGC SWITCH

It may be

celv~ng a very weak s~gnal

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

Use the SLOW AGC position for SSB operation.

PHONES JACK

wlth a

desirable

jack allows use of a 4 to

1/4"

Into the

to turn the AGC off when re-

phone plug attached When the

transceiver.

the speaker 1s dls-

ohm set of

LSB Used for LSB operation. It is internationally de~

termined that the

LSB.

FSK:

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

the COMP meter.

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 to the preference of the

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.

This control adjusts justing the gain of the VOX amplifier. for voice controlled

operation.

For RTTY operation with teletypewriter

COMP LEVEL KNOB

DELAY KNOB

ANTI VOX KNOB

VOX GAIN KNOB

the sensitivity of the VOX circuit by ad-

3.5

and 7 MHz bands belong to

indtvidual operator.

MIC CONNECTOR

The microphone connector is four pronged. allowing use of

the PTT microphone. Figure 2 shows how to wire the

on the microphone cable,

MODE SWITCH

The MODE switch is used for selection of type of waves or

for TUNE

o~eration.

p!ug

ATT SWITCH.

With this switch set

is connected to the antenna circuit. protecting the RF ampli-

fier and

This is the switch for the RIT (receiver incremental ctrcuit. To turn on the circuit. press this switch: to turn off.

press it once again. The RIT indicator is

mixer

RIT SWITCH

to ON. ATT (attenuator) of about 20 dB

circuit from strong input signals.

tuning1

illumanated when

[he RIT circuit is ON. By turning the RIT knob, the receive

-1-3

frequency of VFO can be changed by

quency of fixed

transmit frequency.

channel by

-1-

150 Hz without changing the

kHz and the fre-

f~xed channel crystals are installed in the transceiver).

H. SW (HEATER) SWITCH

BAND SWITCH

This 1 1-position switch selects all the necessary circuits to tune the transceiver to the desired 500 kHz band.

FUNCTION SWITCH

This 7-position rotary switch selects one of the following Iransceive functions.

CAL-

FIX.

CAL-

RMT:

CAL- With the switch in this position. the transceiver's

25 kHz: calibrator circuit generates a marker signal at

VFO: The switch is kept in this position for normal

VFOR: With the switch in this position, the

This position allows internal VFO to one of the transceiver's fixed frequency channels (if an optional fixed channel crystal is installed). With the switch in this position a signal is generated at the selected fixed channel frequency and the main tuning knob can be tuned to zero beat the calibrating signal.

This position allows calibration of the VFO-820 (remote VFO) to the transceiver's operating frequency. With the switch in this position. the transceiver generates a VFO-820 can be tuned to zero-beat the calibrating signal.

every 25 VFO.

transceive operation.

ternal VFO controls the receive function and the

internal fixed channel oscillator controls the transmit function in the oscillator)

kHz for normal calibration of the internal

(if fixed channel crystals are installed

callbration of the TS-820's

calibrat~ng signal and the

TS-820's in-

This switch turns

tubes on and off. The heaters would normally be turned to OFF to reduce power ceiving.

POWER SWITCH

The POWER switch turns all the power on and off in the TS-820.

RIT KNOB

Th~s knob clrcujt is

RIT knob to the RIT OFF

IF SHIFT KNOB

By using this knob during reception. the center frequency of

the IF crystal filter can be shifted by the adjustment of the tonal quality of receive signal or natlng radio interference from nearby frequencies. For normal operation. this knob should be set to the center position (click is heard).

MIC GAlN KNOB

knob is used for adlustment of the galn of MIC ampltfler

This dur~ng

SSB

not deflect beyond the ALC zone

CAR (CARRIER) LEVEL KNOB

Used to adjust carrier level during CW operation. Adjust so

that the meter does not deflect beyond the ALC zone.

AF GAlN KNOB

This knob adjusts the gain of the receiving audio amplifier. The audio volume of the received signal increases as the

control is turned clockwise.

the heater circuits of the three transmitting

consumption in mobile or portable re-

used to change recelve

operatlon Set the center posltlon (0) of the

operatton Adlust so that the meter polnter does

frequency

i1.7 kHz. facilitating

when the RIT

elimi-

FIXR: With the switch in this position. the

ternal VFO controls the transmit function and the

built~in fixed channel oscillator controls the re-

(if fixed channel crystals are instal-

oscillator

controls the transmit and

FIX

ceive function led in the oscillator). The VFOR and cross-channel operation without an external VFO.

Wlth the swltch in this pos~tion. the TS-820's f~xed channel

recelve function of the transceiver (if accessory

TS-820's in-

FIXR allow

RF GAlN KNOB

This control adjusts the gain of the receiver section's RF amplifier. Turn the knob fully clockwise for maximum gain and for a correct S-meter reading. Turn the control counter-. clockwise to reduce the gain.

FIX CH (FIXED CHANNEL) SELECT SWITCH

Th~s four-position rotary switch selects between four diffe-

rent fixed frequency channels which can be installed inside

the transceiver. Fixed frequency operation is convenient for operation on often used frequencies. The fixed channel oscillator replaces the VFO when the FUNCTION switch is placed in the FIX position.

DRIVE KNOB

The DRIVE tuning control tunes the plate tank circuit of the

12BY7A driver as well as receiver's antenna and mixer

In receive the DRIVE control is tuned for maximum

coils. sensitivity

DRIVE control 1s tuned for a maximum ALC reading. When

the control is correctly tuned for transmission it will be cor-

rectly tuned for reception.

lmaximum S-meter deflection). In transmit the

PLATE KNOB

LOAD KNOB

The LOAD control adjusts the loading of the pi-circuit between the final section and the antenna. The control is adjust

as described in Section

DH (DISPLAY HOLD) SWITCH (WHEN THE DISPLAY

With this switch set to ON. the frequency below the display dial remains on even when the main dial knob is rotated. This feature is useful to memorize the original quency when checking other frequencies. The DH switch being ON turns

ting a worry about mis-reading frequencies.

off the liglits for

for impedance matching.

DG-l

IS USED.)

100

"MHz"

frequencies, elimina~

kHz on

fre~

The PLATE control adjusts ampl~fier tubes.

Rear Panel View

tlie plate tuning of the two final

3.2

REAR PAN EL CONTROLS

RFVOLl

Use the RF VOLT control to adjust the output function of the meter Adjust it for a 2/3 scale reading during CW transmission.

COOLING FAN

This fan cools the RF amplifier section of the sure reliable and efficient operation.

ANTENNA CONNECTOR

This

50-239 coax connector should be attached to a suitable antenna for transmitt~ng and receiving. See Section 2.4 for a discussion of an appropriate antenna.

BlAS CONTROL

BlAS control adjusts the bias voltage of the two

The S2001A 16146B) amplifier tubes. Tuning the control clockwise increases the idling plate current of the tubes. Section 4 describes adjustment of the bias current.

SG SWITCH

The SG slide switch controls the screen grid voltage on the final tubes. For tuning or neutralizing the TS-820 you can set the switch to the OFF position. Turn the switch back to the ON position for normal operation. The SG voltage when the switch is up and off when the switch is down.

TRANSVERTER IN JACK

This is the RF input jack for input from a VHF transverter.

TRANSVERTER OUT JACK

This is the low level RF output jack for use with a VHF transverter.

sensitivity

TS~820 to In-

of the RF

1s on

Wnen the position of the AC Voltage Selector changed. it is also necessary to change the power fuse. For

120 volt operation a 6 ampere fuse. for 220 volt operation a

ampere fuse prov~ded with the TS-820 should be used.

VOLTAGE SELECT SWITCH

This

sldde switch switches the primary of the power transfor-

mer to select 120 or 220 VAC operation.

POWER SUPPLY CONNECTOR

This 12-pin connector is used to connect an AC or DC power source to the transceiver.

TRANSVERTER CONNECTOR

This 12-pin connector is used to control an accessory VHF transverter.

FUNCTION

t210

VDC

connectton

100

VDC

Tranrverter

VERTER SWITCH

When VHF Transverter

ceiver. the selection of HF or VHF is automatically accomplished by setting the transverter switch to ON or OFF.

PHONE PATCH IN JACK

This is a phone patch input terminal for transmission of SSTV or other line inputs.

JTV-502) is connected to the trans-

10 +210 11 12

Tranrverter

Normally closed

relay

Ground

No Ground

Sw~tch is

FUNCTION

contact

VDC

connection

GND

IGROUNDI LUG

Toprevent accidental shocks from the chassis. as well as interference. connect a good earth ground to this lug.

FUSE

This fuse is a 3AG. supply of the transmitter against short circuits. Never use a higher amperage fuse than the one specified. An improper one can cause extensive damage to the transmitter. When the fuse blows out. try to determine the cause before replacing it.

amp fuse which protects the power

PHONE PATCH OUT JACK

This is a line output terminal for phone patch or recording. It

is also used for connection to the input of FSK demodulator SSTV.

SPEAKER JACK

The receiver audio output can be connected through this jack to the external 4 to 16 ohm speaker. The internal speaker is disconnected when an external speaker is con.

nected.

EXTERNAL VFO CONNECTOR

This 9-pin connector provides a means of interconnecting the KENWOOD VFO-820. another external VFO, or an external receiver. The interconnecting cable is provided with

the VFO-820. The 9-pin the TS-820 must be inserted in ceiver operation.

jurnpered VPO plug provided with

this socket for normal trans-

FUNCTION

Ground

connec~ion

Normally closed

relay contact Ground

FUNCTION

N~rrnally

ALC

feedback

Occupred

External

open

lermlrlal

speaker

REMOTE CONNECTOR

The REMOTE connector is an 8-pin socket for use in interconnecting accessory item. (See Fig.

FUNCTION

rlgnal

VFO VFO signal shield Ground

12.6

VAC

Relay voltage

iransm~tl

linear amplifier. an external speaker. or another

PIN FUNCTION

301

VOC to irlternal

VFO (pin

VFO

VDC to external

IF OUT JACK

Receive s~gnals from the f~nal IF stage are supplied to thls

jack for monltorlng waveforms of opposlte stattons

CW KEY JACK

Connect a key to this

RTTY KEY JACK

This is used for FSK operation. for connection to the switching circuit of a teletypewriter.

DC-DC CONVERTER CONNECTING HOLE

DC DC Converter (DS-1 opt~on) can be wlred through thls hole For wlrlng. remove the cover plate

1/4

phone jack for CW operation.

plug should be inserted

Rcmove screw slopper plate

and

SIUP~CI

plale

Fig. 5 Changing Power Voltage from.220V to 120V

Sw1r:h sIo,)rwr

opposile

s~dr

220v 220v

Lock

sloppcr pale lo oppqs~te

side

screw

lcvcr

allach~ng

SECTION

4.1

PRELIMINARY PROCEDURE

Set the MIC and CAR controls to zero and the MODE switch to LSB. d~tions before tunlng The TS-820 must be operated Into a 50 than 2 1. Random length my loads cannot be used. Conventional half~wave d~poies and bea~n antennas should only be used at or near tlwr resonant frequency. Exceeding an SWR of 2 : 1 can damage the components in the output stage of the transceiver

Be in Section 2.3

Wtth a su~table antenna and m~crophone (or key1 connected

to the

crlbed

4.2

Refer to Table 1 for the ~n~t~ai sw~tch settlngs of the TS 820 for dure

USE. or CW to prevent acc~dental transmlt con-

ohm antenna or dummy load w~th an SWR less

wlre antennas or light~bulb dum~

sure to complete all of the requlred cabl~ng. as described

2.8.

transcelver. set the TS-820 sw~tches to posltlonsdes-

Table 1

RECEIVER TUNING

recelvlng and then contlnue wlth the

described

OPERATING INSTRUCTIONS

proce

. .

Push the POWER switch on The meter. ind~cator w~ll light. ~ndicating that the transceiver is tlng The receiver section is fully solid-state allowing recep-

tlon with the

GAlN control clockwise the speaker Turn the main tuning d~al w~tliin the frequency range of the amateur band chosen

the signal for the clearest possible reception, and then

Tune

adjust the meter.

The RF GAlN control

effects the S-meter reading. With the RF GAlN control fully clockwise, the

ding.

GAIN, reducing signal strength and band noise

4.3

READING THE OPERATING

SW switch turned to OFF. Advance the AF

until

some recelver noise is heard

DRIVE control for maximum deflection of the S--

varles the AGC feedback voltage whlch

S-meter glves a proper signal strength rea-

Tuning the control counter-clockwise reduces the RF

FREQUENCY

The frequency dial of TS-820 indicates accurate carrier

positions

of a special circuit system. thus the transmit and receive frequency can be directly read on the dial, except for CW recept~on in which case the frequency on the dial is lower by the beat frequency than the receive frequency.

When the

If there is any difference between the frequencies on the dial

regardless of operating modes because of the use

d~g~tal display DG-l ioptlon) is used.

d~al scale. and VFO

opera^

unt~l a signal is heard.

TABLE

The remaining controls do not affect reception so they may be in any position.

Initial Switch Settinqs

REAR PANEL CONTROLS

for

Receivinq

CONTROL

BAND Switch POWER Switch H. SW Switch Stand-by Switch NB Switch RIT Switch RF ATT FUNCTION Switch AGC Switch MODE Switch PLATE Knob DRIVE Knob RIT Knob AF GAlN Knob IFSHIFT Knob RF GAlN Knob EXT VFO Connector

Swltch

SG X VERTER Switch

POSITION

Desired band OFF OFF

REC OFF OFF OFF VFO

SLOW or FAST To the appropriate sideband or CW

Middle of the range for the band

Centered

Fully counter-clockwise

Centered

Fully clockwise

jumpered plug must be

The

(up position1

ON OFF

this socket

scale and the digital dial (option), the correct frequency is on the digital dial.

In this case. the analog dial should be cali~

brated with the calibrate knob.

NOTE: When the digital display is used, the

MHz order change according to the BAND switch and

10 are independent of the counter unit. for example. the indication

In the 29.5 MHz band.

"29999.9" is followed by

dig~ts for

"20000.0".

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 75 on the dial.

The dial

cal~brate knob is forced against the main tunlng

knob by means of a spring permit slip rotation with ease.

Dial

Reading

The

operating frequency of

1rrqurncy

Crample

Ollerartng Frequency

177

and

dial reading

Band

kHz

the

transceiver

frequency

switch

MHz

14000 + 177 = 14177

the

sum

the

band

kHz

Fig. 6 Reading the Operating Frequency

4.4

CALIBRATING THE FREQUENCIES

To read frequenc~es correctly from the dial scale. the dial

must be calibrated previously using a 25

kHz marker. To calibrate, set the FUNCTION switch to CAL-25 kHz and the RIT switch to OFF Turning the RF ATT switch to 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 25 kHz so accurate callbratlon 1s

possible

over the entlre range of the dlal

Wlth the lranscelver set to your desired band. turn the main

tunlng knob so that a beat signal can be received at every

25 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

the

"I-"

Set the IF SHIFT knob to its center position.

If CW filter

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~lter is used. turn the dlal when the marker signal casues maximum deflection on the S meter and then calibrate using the dial pointer is about 800

Hz (CW ftlter YG88C is optional extra].

In this case. the beat frequency

CALIBRATING THE FIXED CHANNEL AND

FRECIUENCIES

VFO

Flxed Channel and VFO frequencies can be calibrated at the

CAL~FIX position of the FUNCTION switch. Set the switch

to the

CAL~FIX position and turn the VFO main tuning knob

unt~l a beat signal is received in the vicinity of f~xed channe!

frequency. Calibration is effected at the zero beat pos~tion.

CALIBRATING THE TS-820 WITH VFO-820

Turn the FUNCTION switch to CAL-RMT to calibrate [hi TS-820 with the VFO-820, a receiver. or another remotr

VFO. Tune the

remote VFO to the frequency selected on th~ 75~820 and zero beat the generated marker signal. At zerc beat. the TS-820 and remote VFO frequencies coincide.

By calibrating the TS-820 for

previously, the TS-820 can be used as a frequency

normal operation. as describe;

standarci

for calibrating the remote VFO.

4.5

RF GAlN

RF GAlN is controlled by changing the voltage of the AGC

c~rcu'it. Adjust the RF'GAIN knob 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

turned fully clockwise for maximum sensitivity.

4.6

RF ATT

4.10

AGC (AUTOMATIC GAIN CONTROL)

If the transceiver is operated in a short-distance (within several ihundred meters) and strong signals of nearby frequencies are received. the wanted signals are blocked. Also. if the wanted signals are very strong. the S meter is scaled

In this instance, set the ATT switch to ON. The input

out. signals to the RF amplifier are attenuated by about 20 providing distortionless reception.

4.7

RIT

By uslng the RIT knob, the receive frequency of VFO can be shifted by about by about quency. your receive frequency can be set to the the RIT switch to ON and using the RIT knob. The state of

RIT can be checked bh the d~al.

4.8

By using the IF SHIFT knob during reception, rhe pass band

frequency of the crystal filter can be shifted by about

circuit in the local oscillator circuit. This is one of the major

features of TS-820 and can be used in the following cases:

IF SHIFT

7 kHz because of adoption of PLL (Phase Locked Loop)

i3 kHz and the frequency of fixed channel

i150 Hz without changing the transmit fre-

the frequency of the opposlte station is deviated.

statton by turning

indicator in the window of the

dB.

Scl tlre AGC swirch to the position appropriate for the rece~ved s~gnal. Generally for SSB reception set,the AGC

swtch to SLOW, for CW reception set the AGC switch to

FAST, and for reception of a very weak signal the switch

lnay be set to OFF.

4.1 1

TRANSMITTER TUNING

Connect the TS-820 to a 50 ohm dummy load or a 50 ohm antclxla with an SWR of less than 2 transmitter adjustments. The life of the final tubes isdirectly

related to the SWR of the antenna and to the length of nlng periods.

Refer to Table 2 for the initial switch settings of the for transmitting. Tune the main tuning knob to the desired ol~eratiiig frequency.

PLATE

Turn

quency wltii~n the amateur band selected. Flip the stand-by switch to SEND and check that the plate current ma. BIAS control for a correct 60 ma of idling current and return

the stand-by switch to REC.

IDLING CURRENT (See Fig. 7)

lllc lnaln tuning knob to the desired operating Ire-

If the plate current is not correct. adjust the rear panel

before making any

(IP) is 60

tu-

TS-820

Adjustment of Tonal Quality and Interference Rejection

1. during SSB Reception.

When the transceiver is used in USB mode, turn the IF

"+"

SHIFT knob in the 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 inal qual~ty suits your listening preference. The IF SHIFT knob is also effective in eliminating interference when the receive Adjustment of Tonal Quality during

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

operation".

FSK IRTTY) Operation at 850

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~gned to reduce ingition type impulse noise. The noise

blanker necessary, activate the noise blanker circuit by flipping the NB switch up.

is particularly ~mportant for mobile operation. When

s~gnals are superposed on nearby signals.

direction and the lower frequen-

to-

CW Operation

Shift

CAUTION: If the plate current is very much higher than 60 ma do not leave the stand-by switch on for more than a few seconds. Excessive plate current shortens the life of the final tubes.

DRIVE TUNING (See Fig. Shift the METER switch to ALC and the MODE switch to

TUN and peak the ALC reading (maximum meter deflection)

with the posltion for adjustment.

NOTE: If there is CAR control until there is an ALC reading.

PLATE TUNING (See Fig. Turn the METER switch back to 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 to 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 to approximately 50% and the keying circuit is shorted.

DRIVE control. The stand-by switch is in the SEND

ALC reading indicated. increase the

Table

Initial Switch Settings for Transmission

(The controls not described should be set as described in Table

FRONT PANEL CONTROLS

~~a~d~~y~~~~~h~ BAND Switch Desired band

SW Switch

MODE Switch USB or VOX Switch

MONl Switch MIC Control Fully CAR Control Centered

METER Switch

PLATE Control DRIVE Control Centered FUNCTION RIT Switch

REAR PANEL CONTROLS

SG Switch UP

EXT VFO Connector Jurnpered OFF plug ~nserted

TABLE

Summery of Transmitter Tuning Procedures

MODE

Swtch

TUN ALC SEND

TUN

IP RF

Mlddle of the range for the band

Swltch VFO

SNED D8p

SEND

LSB

depending on selected band

counter-clockwise

(ON)

Procedure

Adlust BIAS Peak

plate

Peak RF output PLATE AND LOAD controls.

the

ALC readlog

current

control

~8th

for

wlrh the

PLATE conrrol

alternalely

DRIVE

adjusting

control

the

METE

COUP

Fig. 7 Adjustment of the Plate Idling Current

.LLC

'-a"

DRIVE adjosl~nenl

Fig. 8 Plate and Drive Tuning

arigular

(b)

dspacemailt

ALC

PLATE AND LOAD TUNING CAUTION: When the MODE switch is in the CW

tile final tubes draw full plate current in transm#t. Final tube life

directly related to the length of tune-up periods. Do

not transmit with the tubes out of resonance for more than

10 seconds at a tlme.

Turn the MODE switch to CW, turn the METER switch to RF.

and set the adjust the PLATE control and then the LOAD control nately to peak (maximum meter deflection] the power output. nel to bring the output reading to about a 2/3 scale reading.

NOTE

of the SG switch or at the CW position of the MODE

tion sw~tch than at the OFF position or the TUN position of these

switches.

MIC knob and the CAR knob should be properly adjusted

der normal transmit condftions. NOTE

positton of the BAND switch. If the transceiver is left transmit mode over of the final stage may be damaged.

4.12

Tune the TS-820 as described in Sections 4 1 to 4.1 the MODE switch to USE or LS8 and connect a microphone

to the MIC connector.

NOTE

or LSB on the

stand~by switch to the SEND position. Quickly

If necessary, adjust the RF VOLTcontrol on the rear

1 : The ALC meter is less deflected at the ON posi-

This indicates the normal state of RF NFB. The

Transmission is not effected at the WWV or AUX

few minutes. the driver tube 12BY7A

SSB

OPERATION

lnternatlonal amateur practlce dictates uslng USB

follow~ng bands

positlon

alter^

pa^

un-

the

Set

VOX OPERATION Adlilsl tho transceiver as described in the previous para-

graph. Flip the VOX switch phone, just operates. For VOX operation it is desirable to close-talk the microphone to prevent background noises from tripping the Check that the ALC reading for voice peaks is still within the ALC range on the meter, trol for a proper ALC reading.

ANTI-VOX control Increase the control as necessary for

4.13

Tune and load the TS-820 as described in Sections 4.1 through 4.1 1. Connect a key to the back panel CW KEY

jack, set the MODE switch to CW. and set the stand-by

VOX relay just operates.

increasing

TS-820 mto transmission.

I1 the VOX clicu~t

proper VOX operatlon

Do not use more VOX GAlN or more necessary transfers between words, or holds too long. adjust the release time constant by turning the DELAY control.

switch to SEND for transmitting.

transmlsslons are speaker of the can be adjusted w~th VR3 on the AF board

For semi-break-in operation. turn the VOX switch on. Hold the key down and increase the VOX GAlN control. until the

ttlne constant of the VOX circuit. adjust the DELAY control.

the VOX GAlN control until the VOX relay

to control VOX operation. If the VOX circuit

OPERATION

transceiver

onand close-talk into the micro-

If necessary. adjust the MIC con-

acttvated by speaker nolse. adjust the

ANTI VOX gain than

automatically

The aud~o galn of the sldetone

It is desired to change the release

monitored

through the

---

21.0

MHz

28.0

Key the tone of trol range printed on the ALC position If the this range, the

PTT OPERATION By connecting the microphone equipped with PTT switch.

the transceiver munication. depress in the REC position.

transm~tter and speak into the microphone with the

vojce used in normal operation Adjust the MIC con-

unt~l voice peaks are just within the top limit of the ALC

the meter scale. The METER switch 1s in

transm~tted signal will be distorted.

readily used for PTT operation. For com-

Band

MHz

Band

transmitter

PTT switch with STANDBY switch left

section is driven beyond

USE USE

The plate current for CW

ma Use the CAR control to adjust the

opcratlon At 200 ma of IP there may be no ALC read~ng

OPERATION WITHOUT CW FILTER Set the IF SHIFT knob to its center position and the RIT

switch to the OFF position to receive CW signal. Turn the maln tuning knob for about 800 Hz of beat signal and your tiansmlt frequency will be set to the transmit frequency of the opposite station (zeroing). During reception. the side

monltor is activated by pressing down the key. In this

tone case, listen to the side tone signal and the receive signal and adlust the maln tuning knob so that the cycle of the sound is increased. By so doing. the zeroing of frequencies can be achieved. After

RIT knob for the pitch that suits your listening taste.

the

zeroing. set the RIT swltch to ON and turn

operatlon should be about 200

carrler level for CW

When interference is encountered. turn the iF SHlFT knob and the interference can be eliminated. For more effective CW operation. use the CW filter YG-88C (option) by referring to page 34.

OPERATION WlTH CW FILTER (OPTION)

Set the transceiver in the receive mode by setting the IF

SHlFT knob to the center

posltion and the RIT switch to the

OFF position Adjust the main tuning knob for maximum de-

flection of the S meter. The pitch of the sound of the receive signal will now be about 800 Hz. indicating that the zeroing is completed. Turn the RIT switch to ON and adjust the RIT knob for your desired

p~tch of the sound. Also. adjust the IF SHlFT knob

for maximum signal strength.

OPERATION WlTH DIGITAL DISPLAY (OPTION) The digital display indicates the frequency of carrier signal

(BFO signal) so that the frequency indicated is deviated from the transmit frequency of the

opposlte station by the receive beat frequency during CW reception (with IF SHlFT knob set to its center position. the frequency indicated becomes lower). To

zero~in the frequencies with the optional digital display

DG-1, set the RIT switch to ON and turn the RIT knob while manipulating the standby switch. in order to locate a point at which the frequency indicated is not changed regardless of the position of the stand-by switch. With the RIT knob left in that position, turn the main tuning knob until the

slgnal from the opposite station becomes a zero beat signal (zero beat signal can be easily noted by turning IF SHlFT knob). This completes the zeroing of the transmit frequency. Turn

the RIT knob for your desired pitch of sound.

4.14 OPERATION WlTH A LINEAR AMPLIFIER

Tune and load the TS-820 as described in Sections 4.1 through 4.1 1 and adjust it for the selected mode.

The REMOTE connector on the back panel is provided for in-

terconnections with an nual of the

amplifter to determnne whether the linear requires

a normally open (during

ampliher. See the instruction ma-

recelvel or a normally closed (during receive) relay contact Connect either pin 3 (normally closed to ground during during receive)

...

receive)

or pln 5Jmen to ground

oi the REMOTE connector to the control jack on the amplifier. Connect the ALC feedback from the amplifier to pin

of the REMOTE connector. The output of the TS-820 is quite adequate to

drlve mosl amplifiers to full rated output.

4.1 5 FIXED FREQUENCY OPERATION

The TS~820 has a built-in crystal controlled oscillator for f~xed frequency operation. This feature is most useful for commonly used frequencies. nets, or any situation where crystal controlled operation is required. To use the fixed frequency oscillator, turn the FUNCTION switch to the FIX position. Select one of the four available channels with the xed channel selector switch and tune and load the TS-820 as described in Sections 4.1 through 4.1 1 Simply operate the transceiver as described in Sections 4.12 and 4.13.

fi~

TABLE

MODE

TUN

Recommended

Meter

Switch Positions for Different Modes

METER

monitoring

ALC

Switch

ALC

por8t~on

durmg

Approx.

Peaked

100

113

800

None

ALC

200

213

oneratson

scale

range

scalt:

Readlngr

wlthin

Crystal Sp~~ili~ations

Type

holder: HC-25/U

Frequency 5.5

50 MHz Mult#~~l#cnl#on: Fonda~nenlal rn:rlt~rnry

lnlerance

Fig. 9 Crystal Oscillation Circuit

i0002"A

normal

tompcralure

The crystal frequency is determined by the following formu-

las.

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

1.8 for the 160 meter band

3.5 for the 80 meter band

X X X

X X

X = 29.5 for the 10 meter band Crystal Specifications: cillation frequency. and see Figure 9 for type of oscillation

7.0 for the 40 meter band

14.0 for the 20 meter band

21.0 for the 15 meter band

28.0 for the 10 meter band or

28.5 for the 10 meter band or

29.0 for the 10 meter band or

HC-25/U holder. 5.0 to 5.5 MHz os-

circuit.

Example: Desired Operating Frequency = 7.255 MHz Crystal Frequency

This same crystal will operate on each band. Operating Frequency

Example: Crystal Frequency On the 14 MHz band the crystal will oscillate at Operating Frequency

5.5 MHz + 7.0 MHz

7.255 MHz = 5.245 MHz

5.5 MHz + X (in MHz)

Crystal Frequency (in MHz)

5.245 MHz

5.5 MHz + 14.0

5.245 MHz

14.255 MHz

4.16 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's internal VFO is used together with the fixed frequency different one or more accessory crystals installed for work.

osc~llaltor to allow

frequencles.

FUNCTION TRANSMIT

VFOR

reception

fixed channel oscillator must have

Fixed

channel

01cl1aIor

Fixed

channel

and transmission on

this

feature to

Fixed

channel

4.17 MOBILE OPERATION

The compact size and solid-state design of the TS-820 make

deal for mobile use, by using optional DS-1.

it Be sure to use a mobile antenna which meets the requirements described in Section 2.

The normal operating procedures. described previously, ap-

ro mobjle operation. The noise blaker should be used to

ply reduce ignition and impulse noises for clear reception. Remember that during transmission the transceiver draws about 15 amps so be careful not to drain the car's battery.

4.1

OPERATION

In DX (long distance) operation, it may be desirable to increase the speech processor used in TS-820 converts voice signals into 455 kHz SSB signals for compression at quick time constant.

produces little distortion and, unlike the clipper system does not deteriorate the tonal quality. The compression level can be adjusted with the COMP

LEVEL knob Set the meter knob to COMP and adjust so that the meter indicates anywhere within the scale (20 40 dB). The speech processor is used only for DX operation. COMP LEVEL knob so that signals can be heard more natu-

rally.

talk~power by using the speech processor. The

In other operations such as local QSO, press in the

(Use of PROCESSOR)

4.19 RTTY OPERATION

For RTTY operation, the use of demodulator and

teletypewriter is essential The demodulator should be designed to operate from audio inputs and equipped with a fil-

ter for-

2125/2975 Hz (WIDE. 850 Hz shift). To key-in the FSK circuit of

the closed loop

lay contact to the RTTY KEY jack on the rear panel. Fig. 10

shows the

quenc~es of TS-820. The frequency shift of the FSK

to NARROW but it can bechanged to connector as shown in Fig. 11. When operating at the WlDE posirion, turn the IF SHIFT knob in the

by about

balanced during reception.

NARROW operation. change the position of the connector of

the IF unit (refer to "Operation with CW Filter").

Setting the MODE switch to FSK automatically decreases

the input power of the final stage, permitting a long time of

continuous

2125/2295 Hz (NARROW. 170 Hz shift) or

TS~820. insert a relay coil into

c~rcuit of teletypewriter and connect the re-

relat~onship between the transmit and receive fre-

clrcuit is preset at the factory

WlDE by inserting the

"-"

direction

1.2 kHz so that the mark and space signalsare well If a CW filter (option) is used for

operation.

4.20 SSTV (SLOW SCAN TV) OPERATION

4.23 NOVICE OPERATION

SSTV operation can be accomplished by simply connecting

the output of SSTV camera to the PHONE PATCH IN jack

[or

MIC connector1 and the input of SSTV monitor to the PHONE PATCH OUT jack (or SPEAKER jack). Wllen

transmitting

output so that the input power of the final stage is less than

l0OW (less than 125 mA lpl.

signals from the SSTV camera. adjust its

4.21 OPERATION WITH A PHONE PATCH

The rS-820 has rear panel lacks to fac~l~tate uslng the 1s-

820 w~th a phone patch The PHONE PATCH OUT fack has

impedance

an requlres a hdgh Impedance Input See the lnstructlon sheet of the phone patch for

of 600 ohms and the PHONE PATCH IN fack

cablang Instructdons

4.22 USE OF MONITOR SWITCH

To monitor the quality of transmit signal during SSR operation. set the MONITOR switch to ON to demodulate part of transmit IF signal. This feature is useful when checking modulation conditions or adjusting the RF speach processor. When monitoring, use a headphone to avoid howling effect. Note that if the H, SW switch is OFF or the DRIVE knob incorrectly adjusted. the ALC circuit does not operate properly, causing the level of transmit IF signal to become extremely high which results is distortion in the signal being

monttored.

The Kenwood TS-820 offers the unique opportunity to the

beginning

adapts to novice operation at very equipment investment is good for to which the operator advances.

For the novice to operate the

wer

bcs from the final RF section and replace it with a low cost module available from your dealer. Alternately adjust the carrier level control watts [approximately 90 ma]. Adjusting the carrier level yields much less power output because ciency of the tubes.

amateur

limitat~on, all he has to do is remove one of the final tu-

buying a top quality ham rig which

llttle cost. So the initial

what ever level of license

Kenwood within the legal po-

keep the plate input power below

reduces the effi-

Fia.

RTTY

Freauencv

FSK

NARROW

Fig.

Change of the FSK

WIDE-NARROW

$,,%

,111

,,..,,,,,.,

1,,,,

,.#

....................

.,,,,,

..,

,,,,

5.-

..........................................

,,,,,.,

#,#,,..,#,,,.,

,,,,,.,,,,,,.

,,,,,.,,,,,

,888

.,,a

,,,.<,,,,8.#,,,,..,,,,M.<,,,,~.,

,.,,,,,,.,,,,,,.,

TS-820

,,,,

..,,,,,,.,

,888

,.a,,,,,.<,,,,,.,,,,,..,

to,,

..<,,,,,.,,,,,,.,,,,,..#,,,,~.~,,,,~.,,m~.,,,,,..<,,,,~.~,~~~~.~~,~~~.a~~~,t.~,,,,~..,,,,~.~~,,~.a~,,~~.~~~~~~.~~,,,~.~,,,,>.#~~~~~.#~~~~~.c~~~~~.~4~t~~..,,~!~.#,,,,>.#,,,,~.s,,,,~.#,,,~~

BLOCK

,089

,.,,,,,

#,,,,,.,,,,,~.,,,,,~.#,,,,,.,,,,,,.#,,,,~.,,,,,.~,,~,~.~~,~,~.~,,,,,.,,,,,,.<,,,,,.#,,,,~.~,,,,..~~,~w#,,,,~.,<,,,>.<,,,,~.~,,,,...,,,,~.~,,,,~.~,,,,~.,,,!".,,,,,,:

DIAGRAM

.%",ruw.ulurruu.."

.,.,"s<,.<

,,"

*<<,<$,.,"

,%.<

"",."

,>u.w

".<"",."" ,$.,,<$w,

"",."

,<,\.,

"",.""U.<""

,.,s,<,s.

""",,"",.~"",.,"",.""".,"",.""w.<"",."""

.<,,,,,.,,,,,,.,,,,,?.

#,,,~.<,,,,,.,,,,,,.#,,,,8.,,,,,8.#,,,,...,,,,8.#,,,,..,,,,,,.a~m%#~.~s%%8~.~ts*s~

......................

5.1

BLOCK

GENERAL The block

The transceiver receiver and the single conversion type transmitter with a filter type SSB generator. It uses 8.830 kHz IF and its local

oscillator is controlled by VFO. Both the receiver and transmitter use balanced type mixer circuits with dual gate MOS minimfzing spurious during transmission and preventing the effects of strong signals and suprious signals during tton. Taking full advantage of PLL system. the transceiver offers IF SHIFT permit one SSB filter to provide the same effect obtained by US8 and LSB filters. The transcetver also includes a number of latest accessory circuits such as the RF speech processor. the digital display circuit (option), transmit monitor circuit. etc.

TRANSMITTER SECTION

#,,

,,,.#,,,,,..,,,

,,.,,,,,,.,,,a,,.,,,,,

,.#,

st,

........................

#,~,~.<,,,,~.e,t,,..<,

DIAGRAM

diagrafl Of TS-820 is shown on page 24.

is composed of the single superheterodyne

equipped with a PLL (phase locked loop) circuit

functlon (electronic system pass band tuning1 and

in,,

SECTION

,..,,,

,,.#,,,,

CIRCUIT DESCRIPTIOIU

...........................

FET's. thus

recep~

,,,,..,,,,,>.,,,,,

...............................

This signal blanker circudt and the crystal filter. and is finally amplified by the 3-stage IF amplifier. so that it is converted slgnal by the ring detector.

The AF signal

pl~fied to the level to drive the speaker The frequency cha~ iacteiistic of the AF amplifier is automatically changed to suit CW or SSB operation by means of the MODE switch.

1s fed to the IF unit, passes through the nolse

,,,an.<,,,,,.<

,,,,

,.~~E~E~..~~~~~.~~~~~~..~"~...~~~~~.~~~~~~.~~"~~.<~~~~~.~~~~~~.~~~~~~.~~~a..~~~~~.

Into AF

1s applted lo the AF-AVR unit where it is am-

The microphone signal is fed to the IF unit, amplified by the

microphone amplifier and is then fed to the ring modulator composed of 4 diodes. The passes through buffer amplifier and the crystal filter. The

SSB signal thus obtained is further amplified and fed to the transmit mixer of the RF unit. The transmit mixer is a double balanced type mixer

MOS FETs The local oscillator is VCO type (voltage control-

led oscillator) whose output is controlled by the PLL circuit to minimize spurious during transmission. The SSB signal converted into the wanted transmit frequency is amplified by the transmit driver tube two

S2001A power amplifier tubes of the final stage.

They operate in class AB 1 because of low distortion amplifi-

cation fo

The output signal is

antenna.

RF stage to further reduce the cross modulation distortion.

RECEIVER SECTION The antenna signal passes through the RF

where

then amplified by the RF unit.

The amplified signal is fed to the buffer

with VCO output in the balanced mixer with 2 MOS FETs to

produce 8.830 kHz IF signal.

SSB signal.

transm~tted through a pi-network to the

NFB is applied from the output of final stage to the driver

is attenuated

DSB output from the modulator

with 2

112BY7A) before being fed to the

All switch.

about 20 dB as necessary, and is

amplif~er and mixed

5.2

BOARD AND

BOARD

The IF Board is very ilnportant for operation of transmitter

(X48-1150-00)

UNIT

and receiver. ring modulator, crystal filter. transmit-receive IF amplifier

and the ring detector. in addition to the noise blanker circu~t.

AGC

ampl~fier. S meter amplif~er, speech processor and mo-

It is composed of the microphone amplifier,

Fig.

12 IF

Board

nitor circuit.

Crystal filters are self contained for SSB operatlon. CW fil-

(YG-88Cl are available as optional accessories. for easy

ters installation.

RF BOARD

1x44-1150-00)

COIL PACK BOARD 1x44-1140-00) Tuning coils for the individual bands and stages. band select

rotary switch and variable capacitor are all arranged nally in one unit. These parts function together wlth the RF

Board,

ratio-

The RF Board holds the ALC bias circuit as well as the RF amplifier and mixer circuit for transmission and reception.

It also includes a coil pack unit for the tuning circuit.

ampl~f~er circuit and the block VFO BOARD 1x40-1110-00)

Fig. 13 RF Board

COIL P&CC

,mad-l,lO.OO,

The PLL

quency btlity of VFO. The unit is composed of 2 FETs. 2 and 3 diodes. Its oscillation frequency is set to

5.5

circuit is controlled by VFO signals, thus the fre-

stabil~ty of TS-820 is virtually determined by the sta-

MHz.

transistors

5.0

Fig. 14 Coil Pack Board

Fig. 15 VFO Board

PLL

Unit

1x60-1010-00)

This

unit

is composed of the PD Board and the VCO Board to function as a local oscillator lor the ce~ver. Stabilized osc~llator output like that of the built-in

transm!tter and the re-

VFO can be obtained for each band. The PD Board holds

crystal oscillators lor each band. 2 mixer circuits. waveform shap~ng c~rcuit and phase comparator.

I1 uses VFO as a

Fig.

PLL

Unit

standard oscillator to produce a voltage to control VCO (voltage controlled oscillator). It also forms a full electronic IF sh~ft loop using an external carrier signal. The VCO unit is composed of FET type osc~llators for each band. buffer am-

pl~f~er circuit. and the oscillator shut off circuit at the time of fault of the PLL circuit. The oscillator

by the control voltage from the PD Board. The bands of both units can be selected by means of the diode

Counter

Ass'y

Unit

frequency is controlled

sw~tches.

COUNTER

This

unit is composed of the counter mixer board that produces (local oscillator stgnal for the mixer) with carrler signal, and the counter board that counts the frequencies These units are housed in a r~gid shielding case. Since the

frequencies are read by synthesizing all the stgnals, accurate operating frequencies are always counted under any operating conditions. The counter output is picked up as a signal to the

d~splay unit.

ASS'Y

operating

UNIT (OPTION) IX60-1020-00)

frequencies by mixing the VCO output

d~gits.

local oscillator

dr~ve the indicating tubes and is fed to

DISPLAY UNIT (OPTION) (X54-1170-00) CAR ASSY UNIT (~60-.1000-001

This unit uses a 6 digit fluorescent indicator to indicate ope-

rating frequencies counted by the counter unit. All the digits

glow greep to provide many hours of faiigueless operation.

DISPLAY

UUNlT

IX54-1ii0-001

---------------

Fig.

Tl~is is a crystal oscillator that functions as a carrier for the generator during transmission and as a

dr~rlng reception. The output is partly applied to the

lion

Unit and the COUNTER UNlT.

18 Display Unit

BFO

for ring detec-

PLL

CAR

ASSY

UNIT

1~60-IDDO-001

- - -

- -

Fig.

CAR

UNlT

AF-AVR BOARD 1x49-1080-00)

FIX-vox

BOARD

1x50-i350-001

This Board represents the final stage of the receiver circuit.

holdlng an

amplifier and a 9V power stabilizer. The fre-

Thls Board incorporates the fixed channel oscillator. the VOX

(voice control) circuit controls voice operated transmission.

quency characteristic of the AF amplifier can be varied for the side tone oscillator to monitor

and

SSB

operation. tage generator circuit for the block bias circuit I-6Vl.

Fig. 20 AF-AVR Board

signals and the vol-

FIX-YOX

LX50-1350-00,

--------------------

Fig. 21 FIX-VOX Board

VOX-VR BOARD 1x54-1190-001 Three variable resistors. VOX GAIN. ANTI VOX and DELAY.

are directly mounted on a printed

5V AVR BOARD (OPTION1 Thts is a 5V power stab~l~zer used for the counter unlt It

uses IC to provlde rated voltage wlthout maklng any adjustments

MARKER 80ARD 1x52-0005-011 The MARKER board holds the 100 kHz crystal oscillator

101) and a 25 kHz multivibrator 102 and 03) to produce marker signals at 25 kHz intervals to calibrate the TS-820. 04 amplif~es the calibrator

RECTIFIER BOARD 1x43-1090-021

This board holds all of the diode rectillers for the power

ply section of the hlgh voltage. D5 rectifies the 300 volt supply. the 210 volt supply. D7 rectifies the 90 volt supply. and through Dl 1 rectify the 13.8 VDC supply.

HV (HIGH VOLTAGE)

1x43-1110-001

transceiver.

signal^

80ARD

circult board.

1x43-1220-001

Dl through D4 rectlly the

rectifies

sup^

FINAL BOARD 1x56-12'00-00)

Th~s unit ~ncludes all the circuits of the power amplifier of

the

flnal stage wrth the exception of the pi~network clrcuit at

the output side.

Fig. 22 FINAL Board

5.3

FINAL STAGE POWER AMPLIFIER

Thjs ampl~f~er deltvers 200W PEP tnput by 2 transmli power tubes

(S2001A) It is equlpped w~th a cool~ng fan to

temperature rlse during operatton

avoid

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

INDICATOR BOARD

Thls clrcult controls the light emitting diodes which indicate when the RIT circuit is on, when the fixed frequency oscillator

operating. or when the VFO is oscjllat~ng

RELAY BOARD 1x43-1190-001

Th~s unit holds the stand-by relay. a 5V power feed power to the PLL circuit. and obtain low voltage DC power. The relay of

trolling block

thls unit 1s used to select OC signal for con-

b~as, cross channel operation. etc

1x54-1180-00)

smoothing

stabilizer

capacitors to

<lllll.llllll.lllll8.~"#08.~mmm#.anmsm~.~a~aa8..a,a,~.~,,,,~.",,,..<,,,,.

..,,,, , .,,,,

".#

,,,,,-,,,,,.

,,,,

,.#

,,,,,.,,,,"

.,,,,,,.

.......................................

",,"

,,,,%,,.

,m,,,.,,,,,w,,,,,,.,,,,,,.,,,,,,.,,,,,,.,,,,,,.,,,,,,.,,,,

..,,,,".#",,,.<,,,,,.,,,,t.#,mt,s.#,s,m~.<mm#mt.~*#om..~88tm~

SECTION

illlll..ulll..lla..~####8.~m##m~..a~aa.#as>#8.<aaa,8.<,,,a..<,,,,~..,,,,~.<,,,6

6.1

GENERAL INFORMATION

The TS-820 has been factory sligned and tested to The TS-820 should be placed on its side, with the final sec-

specifications before delivery to the customer. Under norma1 c~rcumstances the transceiver will be properly adjusted to operate in accordance with these operating instructions. cessibility to the modules. In fact. the equipment owner can void the transceiver's war- ments can be made without removing the boards from the ranty by attempting service or alignment without permission transceiver.

from the factory.

When operated properly. the transceiver can give years of

service without requiring realignment. The information in th~s sectton. some general service procedures which can be accompl~shed without sophisticated test equipment.

REMOVING THE CABINET (See Fig. Figure 21 shows how to remove the TS-820's cabinet. Re-

move the eight top cover screws and the nine bottom cover screws and lift away the panels. The speaker leads will still be attached to the chassis so be careful when removing the top cover. The leads can be unplugged. if necessary.

,.,,,,,,.,,,

MAINTENANCE AND ALIGNMENT

#,..',,,,,.,,,,,,..,,

23)

d..,,

,,..,,,,,,..

#,#

,...

#,#

a,..,

,,,..,,,,,.,,,,,,.,,,,,,.,,,,,,.<,,,,,.,,,,,~.,,,,,,.,,,,,,.,,,,,,.,,,,,,.,~,,,..<,,,,,.<,,,,,.#,,

SERVICE POSITION (See Fzg. 24)

tion up, for any alignment or service. This position permits adequate

ventilation

for the final tubes as well as easy ac-

,,,.,,,,,,.,,,,,8.#,,,,~.c,,mos.#tm#m?.amt#88.~m#m#8.~*8am~.~mmsm~

Most of the described adjust-

Fig.

Removing the Cabinet

Fig.

Service Position

6.2

ACCESSORIES

CAUTION: BE SURE THE TRANSCEIVER IS UNPLUGGED AND TURNED OFF BEFORE REMOVING

THE

CASE.

INSTALLING THE CW FILTER

IYG-88C)

(See F~gure 251

Install the filter unit according to the following procedures:

Remove the top cover of the transceiver using a screw-

driver. Care should be used not to break the leads con-

nected between the

the cover. Next. remove the

Turn the transceiver upside-down and remove the bot-

2P connector and the speaker on

2P connector.

tom cover.

Insert the filter in place at the IF unit circuit board on the left wall

the transceiver. Solder the 4 pins from the rear side using a small size soldering iron. Soldering should be finished as quick as possible.

Change the position of the wnnector IIF2) located at the lower section of the IF unit depending on whether

the FSK shift width is 170

Only SSB filter used

.........................................

Hz or 850

Hz.

SSB and CW filters used:

FSK shift 170 Hz (CW filter used) FSK shift

850

ISSB filter used)

.................

................

NOTE:

If you are not interested in FSK operation. plug in

1) the connector either to the

"8" position or the "C" position. To facilitage the installation of filter and setting of

2) connector. remove the

screws holding the IF unit

fixture to the chassis and then pull the unit upward.

Reconnect the 2P speaker mnnector in position. then replace the bottom cover and the top cover. The instal-

lation

INSTALLING THE DC-DC CONVERTER

Remove the patch plate located on the rear panel of

the filter is now completed.

IDS-1)

TS-820

2 Secure the DC-DC

unlt to the rear panel usrng the four

tapplng screws supplled w~th the unlt

Select the correct color coded lead from the DC-OC unlt rnaklng sure that the color code corresponds to that of the lead connected to the DC-OC

termlnal board adlacent to the power transformer Solder the lead onto the terrnlnal board

?>(I(?

,114,

.....

,,<**,8",a,,,:

Green

Purple

Gray

Roar

panel

Rear

panel

Ts-820

Fig.

Installing

the

CW Filter

Fig. 26

lnstallrng the DC-DC Cbnverter

MOUNTING THE DIGITAL DISPLAY [DG-1)

[See FI~ 27)

DG1

is provided w~th the following 3 units:

Display Unit

5V AVR Unit

Counter

Mount the above 3 units in place in the set using screws (Fig.

Insert the connector and the wiring is completed.

3. Calibrate the standard frequency of the counter unit For detailed method of mounting. refer to the instructlon manual of

Ass'y Unil

27[a))

WWV (refer to paragraph 63),

ass'y

Fig. 27 (cl

Fig. 27 la)

Fig. 27 ibl

COUNTER

ASS'Y

UNIT

Fig.

(dl

TRANSVERTER (TV-5021

CONNECTION OF VFO-820 (See Fig. 291

To connect the transverter to TS-820. proceed as follows:

1. Check that the power to the transverter and TS-820 is OFF.

2. Connect the cable supplied with the transverter to the X

VERTER connector of TS-820 and the CONTROL connector of the

TV-502).

Connect the supplied pin-cords to the X VERTER OUT jack of TS-820 and the TX IN jack of the transverter (2m

IN jack for TV-502).

Connect the supplied earth cable between the GND ter-

mlnais of TS-820 and the Transverter. is necesarry because it prevents electrical shocks and provides stabilized operation.

5 Turn on the transverter switch on the rear panel of

TS~820.

Changeover between HF and VHF is automatically accomplished by the POWER switch of the transverter.

Be sure to turn off the transverter switch when the

transverter is not connected. fication for transverter operation.

Connect the antenna to the ANT terminal on the rear of

transverter

the Check to see that the POWER switch and the standby

switch of TS-820 are set to OFF and REC respectively.

Also. check that the POWER switch of the transverter is

set to OFF. Then connect the power cords to AC outlet (or DC power source for DC operation).

transverter (2m CONTROL connector for

This connection

The SG switch may be left in the ON

TS-820 requires no modi-

(144

MHz for TV-502).

position.

Connect VFO-820 as shown in Fig 29. This connection makes your transceiver operation more enjoyable. After con-

nection. keep the 9-P MT plug removed from the EXT VFO connector of TS-820 in a proper place so that it is not lose. Connecting cord is supplied with VFO-820.

By manipulating the function switch of VFO-820. you can operate TS-820 as if you are using 2 sets of transmitters and receivers. To calibrate the VFO frequency of TS-820 and that of VFO-820. proceed as follows:

Set TS-820 in the receive mode and then set the

FUNCTION switch to CAL-RMT position.

The FUNCTION switch of

position Tune the frequencies of TS-820 and VFO-820 so that a

beat is generated. When they are tuned for zero beat. the frequencies of both units are perfectly calibrated.

For operation of VFO-820. refer to the instruction manual of VFO-820.

~~0.820 may be set in any

Transceiver Interconnecting Cord

Fig.

Connection of Accessory Remote VFO

REMOTE CONNECTIONS EXTENSION FEET Fig. 30 shows the REMOTE connector. This 8-pin plug The TS-820 is provided with two extra feet which can be

can be used for attaching linear amplifiers. or other external accessories to the transceiver. operating positions the tilt makes it easier to read the dial

r------1RL

used to raise the front panel of the transceiver.

and meter. Fig. 31 shows how to install the feet.!

In some

external

speaker

Fig. 30 Remote Connector

Fig. 31. Attaching the Extension Feet

FIXED CHANNEL CRYSTAL INSTALLATION Section 4.15 describes fixed channel operation with the

TS-820. To install the accessory crystals. remove the trans-

ceivers bottom cover and locate the FIX-VOX board side the power transformer.

Insert the crystal in the desired channel position (the positions are labeled on bottom of the case) and use the appropriate trimmer CAL-FIX feature of the TS-820 can be used to net the crystals as described in Section 4.4.

(TCl through TC4) to net the crystal.

The

6.3

ADJUSTMENT OF RECEIVER SECTION

ADJUSTMENT OF 9V AVR VOLTAGE (AF-AVR UNITI Adjust VR4 for

ADJUSTMENT OF AGC

Adlust VR1 for 3 3V between the term~nal "RF1' and the chass~s

RIT ADJUSTMENT (AF-AVR UNITI Set the RIT knob to its center position and turn on the RIT

switch. Rotate the main tuning knob until the marker signal can be heard the beat tone is not varied regardless of the position of the

RIT switch.

MARKER FREQUENCY

UNITI

The marker frequency is factory adjusted prior to shipment.

However, if it is deviated after a long period of use of the set. it must be calibrated accurately. TS-820 is designed to receive WWV signals so that the marker frequency can be cali-

prectsely.

brated Set the BAND switch on the front to WWV and turn the main tuning knob until it is aligned with the dial. A standard 15 MHz WWV beat signal will be received. By setting the FUNCTION switch to CAL-25 kHz, this beat signal is superposed on the marker beat signal and is heard as a double beat signal. Adjust the ceramic, trimmer til a zero beat is obtained. The marker frequency is now fully calibrated.

COUNTER FREQUENCY CALIBRATION (COUNTER UNIT, OPTION)

With the FUNCTION switch in the VFO position. turn the

BAND switch to receive connecting the counter calibration cable suppled to the counter unit and the X VERTER IN jack on the rear panel. the WWV beat signal is superposed on the higher harmonics of the standard signal of the counter and is heard as a double beat signal. Adjust the trimmer of the counter unit to obtain a zero beat. By so doing, the frequency indicated on the digital display is accurately calibrated. After the calibration. disconnect the counter calibration cable.

9V between the terminal "9" and chassis.

BIAS (AF-AVR UNIT)

in suitable beat tone. Then. adjust VR2 so that

CALIBRATION (MARKER

"0"

on the sub

TC1 un-

MHz WWV standard signal. By

Set the FUNCTION switch to CAL-25 kHz to receive a marker signal. Make certain

ted with a 50 its center position. adjust the ANT and MIX coils for maximum deflection of the S meter. using the frequency table given below. In adjustment, then proceed to other bands. To adjust the only

29.0 MHz in the 29.0 MHz band.

ADJUSTMENT OF RECEIVE IF (RF AND IF UNITS1

Receive 25 kHz marker signal using any frequency. Adjust the DRIVE knob and the main tuning lection of the S meter. Then adjust

T5 and T7 of the IF unit until the S meter indicates maxi-

mum deflection. Do not touch TI. T2. T3 and 16.

S METER ADJUSTMENT (IF UNITI

Disconnect the antenna and set the transceiver in receive

mode. The zero-point adjustment of the S meter can now be acomplished in the following manner: Adjust position. adjust

14.175 MHz 40 dB signal (reading on

1.8

3.5 7

29.0

WWV

VRl so that the meter pointer indicates its minimum

VR2 until the S meter indicates "9". using

7551 resistor. With the DRIVE knob set to

Adjustment

Freouencv

1.90

MHZ

3.75 MHz

7.15 MHz

14.175 MHz

21.225 MHz L13

29.00 MHz

15.00

If a standard signal generator (SSG) is available.

MHz

thattheANTterminalsareshorted

start with the 1 8 MHz band and

10m band, use

1 1

ANT Coil MIX Coil DRIVE coil

LlO, L1 1 L12

L14 L9 L 1

COIL

khob for maximum def-

T2 of the RF unit and T4.

L15 L16

L17 L5 L18 L6 L19

SSG)

ADJUSTMENT OF ANT AND MIX COILS (COIL PACK UNIT)

The ANT coil and MIX coil are included in the coil oack unit.

6.4

ADJUSTMENT OF TRANSMITTER SECTION

ADJUSTMENTOFTRANSMIT DRIVE COIL (COIL PACK UNIT)

ADJUSTMENT OF SIDE TONE LEVEL (AF-AVR UNIT) Adjust VR3 to your desired level.

ADJUSTMENT OF MONITOR LEVEL (IF UNIT)

The drive coil is built in the coil pack unit. Set the SG switch

on the rear panel to OFF and the DRIVE knob to its center

position. Then. set the METER switch to ALC and the

MODE switch to CW or TUN position. With the standby switch in the SEND position, adjust the drive coils for maximum ALC deflection for each band using the same frequency as for the adjustment of ANT and MIX coils.

During the adjustment. turn the CAR knob just enough to swing the meter any band.

ADJUSTMENT OF TRANSMIT IF

(IF AND RF UNITS)

Using any frequency. set CW or TUN position. Adjust T5 of the IF unit and

RF unit until the meter

CARRIER BALANCE ADJUSTMENT (IF

(See Fig.

With a dummy load connected to the ANT terminals. adjust for the maximum output using

the transceiver in LSB mode and turn the RF VOLT

the rear panel for maximum sensitivity. The pointer of the

RF meter will deflect if the carrier is unbalanced. In this case, be sure to turn the MIC knob to the minimum position. To balance the carrier. adjust the trimmer fixed resistor VR2 alternately until the meter pointer indicates a minimum position. Change the mode to USB and

if the pointer deflects. then readjust so that the pointer deflects the same amount for both LSB and

(ALC). This adjustment can be started with

COIL

the transceiver in transmit mode at

IALC) indicates maximum deflection.

UNIT1

31)

14.175

MHz frequency.

TC1 and the semi-

T1 of the

Set

knob.on

USE.

Adjust VR4 to your desired level.

Fig. 31 Counter Frquency Calibration

NEUTRALIZING THE FINAL STAGE

Adjust the drive and final stages completely using

MHz. with a dummy load connected.

21.3

Set the SG switch to OFF and measure the output at the

ANT terminals (shorted with dummy load) with a high sensi-

tivity RF voltmeter or a tester having a rectifying diode such

as 1

N60. Then turn the nuetralizing variable capacitor lTC1 viewed through the adjusting hole in the upper panel of the final box) for minimum output. Normally. it is unnecessary

to remove the shielding case for this adjustment, but be sure to use a insulated screwdriver. Use of a non-insulated screwdriver will result in incorrect adjustment and also cause electric shocks.

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7.1

GENERAL INFORMATION

The problem5 dercribed in

7.2

TRANSMITTER AND RECEIVER CIRCUITS

SYMPTOMS

llghrr do not light and theye is

Pilot receiver noise when the POWER rwilch ir turned

on.

Frequency difference between transmit and receive.

FMing

sideband operation.

VFO

lor

FIX)

indicator doer not light.

The

relays operate with the stand-by

1w8tch in the REC position.

Signal reports of off frequency operation

even

though (he dial scale ir calibrated.

SECTION

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........................

thir

table are fa~lurer caured

.............................

TROLIBLESHOOTING

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general by improper operation or connection of ceivcr, not by defcctcve componcntr. Thcrc

Bad power cahlc

Blown

newer

Wrong polarily connrclion for DC operation.

9 VDC supply

Short clrcuil tine.

Improper battery volkagc in mobile portable operation.

Rear panel VFO plug

Improper inicrol~honr

Calibrator requires allgnrnent.

rervice manual for repair of the

CAUSE

conner!ionr.

rup~ly lure.

not

aJjurlrd.

volt powl:r rut,ply

not

lnsrrlrd

connccllon.

..,,,

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the

trans^

a reparall:

TS-820

REMEDY

Chc?ck

col,ll:r

;md connr:riionr

R~plac~ the lure.

Check for a ncgallvr: ground 0owl:r connucl~on.

See

Secl~on 6.3.

Check the 9voll iuiiilly.

Chtcck ha\t~.ry

altr:rnator volI:lyr:.

lnlert the jumpered plug

Requare thc! microphonr:

See

Secton 6.3

connl~clor.

':.

7.3

RECEIVER SECTION

SYMPTOMS

Accessory CW filter is installed but ielec-

livily

and

antenna ir

are

heard.

intelligibility

are

connecred

poor.

bur

antenna is connected

rignal

received.

more bands

One

arc

not

S-meter deflects without a received signal.

The RIT control circuit

on.

but the receive and transmit

and

but

are

operating but

zero

the calibrator

r~gnalr

are

wlth the RIT

signals

heard.

rorne

CAUSE

Connection of IF board not moved to CW.

Bad CW fllrer.

Inoperative VFO

Microphone

switch) is in the transmit posilzon.

3. Transverter switch is ON.

Bad TIR relay.

The PLL unit

band.

The

antenna

requires alignment.

IF board is

Low AC line voltage.

IF board is

RF gain control closed low

senrit;vity.

Receiver

The RIT conlrol

FC orcillalor.

PTT rwilch

nor

coil of the defective band

our

of adiurtmenr.

of adiurtmrnl,

rectlon

reouirer realianmenr.

operatng

our

lor

of adjurtnlenl.

rland-by

thedefective

See

Sectran 6.2

Replace the CW filter.

Insert Ihe shunt plug into back panel.

Release the PTT switch.

tile switch OFF.

3. Turn

Replace the relay.

Repair the PLL unit.

2. See Section 6.3.

See Section 6.3

Use

s,ep-up transformer to raise

the line voltage,

See Section

Open RF GAIN control.

See Section

See Seclion

SSB signal unintelligible.

SSB

received

tow cut/,

slgnal is extremely hlgh

cur

lor

RIT circuit off.

MODE rwifch ir set

IF SHIFT is

out

of adjustmen?

wrong rideband,

Push RIT button.

TU,~

MODE switch

band.

se,

the

center

correct ride-

[in ,he pasilion

click)

7.4

TRANSMITTER SECTION

SYMPTOMS

me~er

deflects with

current.]

ALC meter doer not deflect and there ir

output.

TS-820 will not ooerate

The

is output, but the RF meter shows

There no output.

RF meter deflects

VOX

trips with AF round from the speak.

er.

VOX circuit holds too long.

releaser between words

too

far.

outpur

In0

SSB,

piale

NO high voltage (+800v) tuber.

Bad final tuber.

SG rwirch is turned off.

Too little MIC gain.

Open microohone plug phone.

Too little microphone gain.

Defective microphone am~lifier GENERATOR board.

RF VOLT control rectly.

RF VOLT control

rectly.

VOX GAIN control

VOX switch is OFF.

ANTI VOX control requires adjust-

ment.

VOX time hold control requires adiurtment.

CAUSE

not

closed.

bad micro.

adjusted

the final

the

cor-

REMEDY

Cheek the HV power supply.

Replace the tuber.

Slide the switch up.

Increase the MIC GAIN control.

Check the microphone.

Increase

Repair the circuit.

Adiurt control

Adjust control at full output.

See Semion 4.12

Turn the switch

See Section 4.12.

the MIC GAIN conlrol.

for

full output.

for

213

on.

scale readong

scale reading

Excessive plate current.

Plate current is too high

all bandr.

Broad DRIVE tuning

bandr.

drive

intermittent drive

more bandr.

Low drive and broad DRIVE tuning bandr.

Signal reports of dirtortian.

Plate current Tuning becomer very broad.

Idling current increaser.

Every rime either of the

replaced, the TS-820 requirer neutraltrb

tion.

is too low.

one

final

too low for

one

tuber

all

Detuned final recrion.

Low negative power supply voltage.

Idling current requires adjustment.

Carrier requires adjustment.

requires alignment.

PLL

unic requires adjustment.

Bad driver tube.

Carriei requires balancing.

Too much microphone gain.

Bad final rubes.

See Section 6.4

Check the power rupoly ourput.

See Section 4.1

Adiurt CAR conrrol.

See Section 6.4.

Replace the tube.

See

Section 6.4

(

Reduce MIC control.

Replace the tuber.

See Section 6.4

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BOTTOM VIEW OF THE TS-820

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I1F lJNll i;(11~ iX44- 1 150-001 iX44- 1 140-001

~ACK

UNIT

PLL ASS Y UNlT

,iXGO. 1010-001

-CARHICR ASSY UNlT lX601000~001

FINAL UNlT

iX5G 1200~001

MAHI<ER UNlT

1x520005-001

POWER

lnhNSFDRMER

FlXVOX UNlT

1x501 350-001

;

IJNIT

90~001 iX4Y- 1080~001 lX43K 190-001

AI-

AVI~

UNIT

IIELAY

UNIT

product

IO-

-KENWOOD CORPORATION

6-17

3-chome. Aobadai. Meguro-ku. Tokyo

6433 PRINTED

153.

Japan

JAPAN 850.1568-00

Kenwood TS-820 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual