Kenwood TL-922A Manual de usuario

QKENWOOD

LINEAR

AMPLIFIER

Model

TL-922A

INSTRUCTION

MANUAL

AFTER

UNPACKING

advisable

save

all

original

packing

cartons

(inner

and

outer)

protect

your

valuable

Linear

Amplifier

from

damage

should

you

wish

transport

for

remote

opera-

tion

ship

for

after-sales

service.

The

following

explicit

definitions

apply

this

manual.

sure

read

these

definitions:

NOTE

disregarded,

inconvenience

only

—

damage

personal

injury.

CAUTION

equipment

damage

may

occur,

but

not

personal

injury.

WARNING

personal

injury

may

occur

—

not

dis-

regard.

CONTENTS

TL-922A

SPECIFICATIONS

SECTION

FEATURES

. .

SECTION

PREPARATION

FOR

USE

2.1

Accessories

2.2

Installation

Power

Tubes

2.3

General

Tips

Installation

2.4

Power

Source

2.5

Line

Voltage

Change

2.6

Power

Cable

2.7

Exciter

2.8

Antenna

2.9

Interconnection

2.9.1

Grounding

2.9.2

Cable

Connection

SECTION

CONTROLS

AND

THEIR

FUNCTIONS

3.1

Front

Panel

3.2

Rear

Panel

SECTION

OPERATION

......

wee

eeeee

4.1

Prechecks

4.2.

Operation

4.3

SSB

Operation

4.4

RTTY

Operation

4.5

Setting

the

ALC

ADJ

Control

4.6

Adjusting

the

Output

Meter

4.7

High-Voltage

Transformer

Protection

4.8

Carrying

Your

TL-9224

SECTIONS

CIRCUIT

DESCRIPTION.........

5.1

Linear

Power

Amplifier

5.2

Power

Supply

5.3

Fan

Motor

Delay

Stop

Circuit

5.4

Meter

Drive

Circuit

5.5

Spark

Suppressor

CAUTION

Read

Operating

Manual

Section

before

proceeding

unpack

and

assemble

your

amplifier.

WARNING

LETHAL

VOLTAGES

PRESENT.

SECTION

MAINTENANCE...............-

6.1

Internal

Cleaning

6.2

Replacing

Power

Fuses

6.3

Replacing

Power

Tubes

6.4

Input

Matching

Circuit

SECTION

TROUBLESHOOTING

HINTS

PACKING:

iiss:0

ics

eis

tower

oat

ILLUSTRATIONS

Fig.

2-1

Upper

Case

Cover

Assembly/

Disassembly

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

Fig.

2-2

Correct

Power

Tube

Handling

Fig.

2-3

Parasitic

Suppressor

Coil

Mounting

Fig.

2-4

Input

Voltage

Terminal

Boards

Fig.

2-5

Power

Cable

Color

Code

Fig.

2-6

Exciter

Connections

for

and

ALC

Controls

.........

oii

eee

Fig.

2-7

Interconnection

the

TL-922A

......

Fig.

3-1

Front

View.......

beciegtsade

hice)

Fig.

3-2

Rear

View

Cees

eae

eehae

Fig.

5-1

Linear

Power

Amplifier

Circuit

.......

Fig.

5-2

Transformer

Primary

Current

Flow.....

Fig.

5-3.

Fan

Mogpr

Delay

Stop

Circuit

........

Fig.

5-4

Meter

Drive

Circuit................

Fig.

7-1

Packing

for

Shipment

Fig.

7-2,3Top,

Bottom

Views

TABLES

Front Panel

Controls

Set-Up

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

Tune

and

Load

Initial

Settings

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

Transmit

Frequency

Range:

Excitation

Energy

Required:

Mode

and

Duty

Cycle:

Rated

Plate

Input:

Plate

Voltage:

(at

signal)

Circuit

Type:

3rd

Order

Intermodulation

Distortion:

Input

Impedance:

Output

Impedance:

Cooling:

Interlock

Safety

Features:

Thermal

Protector:

Fan

Motor

Delay

Stop

Time:

ALC:

Power

Tubes

Used:

Semiconductors:

Power

Requirements:

Cables

Supplied:

Dimensions:

Weight:

sansa

-atnscnnctny

tans

ateesanntanectte

satan

stances

tate

tanta

taintedeity

satan

TL-922A

SPECIFICATIONS

sauicaap

-ctacnastettttcn

att

enact

anne

nnn

santa

sents

caat

-ant-atto

160m

through

15m

Amateur

Bands

nominal,

120

maximum

SSB,

continuous

for

minutes.

and

RTTY,

key-down

continuous

for

minutes.

P.E.P.

SSB,

RTTY

3.1

SSB,

2.2

RTTY

Class

AB2

grounded

grid

linear

amplifier

Below

—30dB.

50 2,

unbalanced

better

than

1.5

SWR

75 2,

unbalanced.

Forced

Air.

Primary

high

voltage

circuit

cut-off.

Secondary

high-voltage

circuit

grounding.

Locks

out

transmit

relays

H.V.

power

transformer

overheats.

140

seconds.

(at

room

temperature)

Negative

going,

adjustable

threshold

-8V

maximum

output

(typical).

Eimac

3-500Z,

two

pieces

Diodes,

pieces

Zener

diode,

piece

120V,

28A;

240V,

14A;

50/60Hz;

for

maximum

SSB

input.

Signal

cable

(coaxial)

with

UHF-type

connector,

1.5m.

Control

cable,

1.5m.

390mm

190mm

407

(15-3/8

7-1/2

16”)

Net

(68

Ibs.)

Shipping

(83

Ibs.)

The

above

specifications

are

subject

change

without

notice

due

technical

im-

provement.

agate

statesman

att

The

TL-922A

Class

AB2,

grounded

grid

linear

amplifier

developed

Trio-Kenwood

through

ad-

vanced

high-power

technology

using

two

high-per-

formance

Eimac

3-500Z

power

tubes.

covers

all

bands

160

through

for

SSB,

and

RTTY

modes

operation.

Unprecedented

Reliability

The

TL-922A

designed

provide

stable,

high

output

power

for

extended

periods

continuous

use.

Engineered

with

Trio-Kenwood’s

advanced

circuit

and

mechanical

technology,

the

TL-922A

employs

two

rugged

3-500Z

power

tubes

their

full

advantage.

Low

Intermodulation

Distortion

Intermodulation

distortion

(IMD)

minimized

through

the

use

negative

R.F.

feedback.

Quick

Turn-On

Warm-up

not

necessary.

The

3-500Z

tubes

are

fast

heating.

Full

Safety

System

protect

you

against

any

possible

high

voltage

elect-

ric

shock,

your

TL-922A

has

double

safety

system

comprised

interlocking

switches.

One

interrupts

the

high

voltage

primary

circuit

while

the

second

directly

grounds

the

secondary

high

voltage

circuit.

Also

provided

are

bleeder

resistors

for

discharging

the

high

voltage

capacitors

and

“DANGER”

warnings

high

voltage

positions.

Please

observe

all

warnings,

they

are

for

your

protection.

Newly-Developed

Fan

Motor

Delay

Stop

Circuit

reduce

power

tube

deterioration,

your

TL-922A

has

newly-developed

fan

motor

delay-stop

circuit

comprised

thermal

delay

relay.

The

cooling

fan

will

normally

run

for

140

seconds

(Typ)

after

power

removed

from

the

unit

and

will

measurably

ex-

tended

tube

life.

Mode

Switch

for

Efficient

Linear

Operation

MODE

switching

provided

select

between

the

SSB

Mode

for

the

maximum

PEP

output

with

good

SECTION

FEATURES

sustenance

canna

10.

11.

12.

13.

linearity,

and

the

Mode

for

low

power

consump-

tion

and

heat

generation

during

extended

periods

operation.

Linear

Amplification

Control

Switch

This

switch

capable

setting

your

TL-922A

the

straight-through

state

irrespective

the

standby

control

the

exciter.

Variable

Threshold

Level

(ALC

Detector)

The

ALC

circuit

will

accommodate

exciters

120

(nominal)

varying

the

ALC

threshold

level.

This

effectively

prevents

overdriving

the

final

power

tubes,

limiting

the

Amplifier

its

linear

range

and

guaranteeing

low

distortion

maximum

power.

Two

Panel

Meters

adjusting

monitoring

your

TL-922A,

one

meter

always

indicates

the

(Ip)

plate

current;

while,

with

the

other,

you

may

read

(Ig)

grid

current,

(RF)

relative

output,

(HV)

high

voltage.

This

facilitates

ease

operation

your

TL-922A.

Rigid

Mechanical

Structure

The

die-cast

side

panels

effectively

support

the

weight

the

amplifier

against

shocks

and

jarring

during

transportation.

Recessed

side

panel

handles

are

pro-

vided

the

Amplifier

can

easily

carried.

Vernier

Plate

Tuning

Dial

The

PLATE

tune

dial

equipped

with

reduction

gear that

facilitates

easy

tuning,

particularly

for

the

higher

bands.

also

effectively

prevents

accidental

miss-tuning

during

operation.

Controls

and

panel

arrangement,

designed

human

engineering

standards,

provide

superior

ease

operation.

Neat,

Contemporary

Appearance

Mechanical

arrangement

and

sophisticated

design

match

any

Trio-Kenwood

transceiver

transmitter.

Your

TL-922A

can

also

used

high-quality,

general

purpose

Amateur

band

linear

amplifier

with

any

exciter

capable

8OW

120W

output.

2.1

ACCESSORIES

Carefully

unpack

your

TL-922A

Linear

Amplifier

and

check

that

supplied

with

the

following

accessories.

Instruction

manual

B50-2587-00

copy

Coaxial

cable,

1.5m,

with

UHF-type

connectors

X42-

1100-00

piece

Control

cableW/8Pin

Plug

piece

(For

TS-520,

TS-820

Series)

X42-1110-10

Control

cable

W/7

Plug

piece

(For

TS-120,

TS-130,

TS-180,

TS-430,

TS-530,

TS-830,

TS-930

Series)

X42-1110-11

Spare

fuse,

15A

FO5-1533-05

pieces

Extension

foot

JO2-0049-14

pieces

Screws,

12mm

long

N30-4012-46

pieces

Plate

cap

FO2-0407-04

pieces

Parasitic

suppressor

coil,

right

hand

piece

L39-0401-05

10.

Parasitic

suppressor

coil,

left

hand

piece

L39-0402-05

11.

Screw,

6mm

long

N30-3006-46

pieces

12.

Plain

washer

N15-1030-46

pieces

13.

Spring

washer

N16-0030-46

pieces

2.2

INSTALLATION

POWER

TUBES

protect

the

power

tubes

your

TL-922A

against

vibration

and

shock

during

transport,

they

were

packed

separately

from

the

amplifier.

For

insertion,

the

procedures

below.

Prepare

the

following

mounting

hardware

and

tools:

Mounting

Hardware

Power

tube,

3-500Z

pieces

Plate

cap

pieces

Parasitic

suppressor

coil,

right

hand

and

left

hand

piece

each

Screw,

long

pieces

Plain

washer

pieces

Spring

washer

pieces

Tools

Phillips

screwdriver

piece

Small

standard

screwdriver

piece

NOTE:

parts

tray

prevent

loss

metric

hardware

helpful.

WARNING:

Before

proceeding,

make

sure

that:

The

power

cable

NOT

plugged

the

wall

out-

let.

The

METER

switch

the

position

and

the

multimeter

reads

OV.

Proceed

follows:

(Refer

Fig.

2-1)

Remove

the

four

Phillips

screws

holding

the

upper

case

cover.

Remove

the

upper

case

cover.

Remove

the

four

self-tapping

Phillips

screws

and

four

flat

head

self-tapping

Phillips

screws

holding

the

inside shield

the

power

tube

enclosure.

SECTION

PREPARATION

FOR

USE

teases

t-tests

sgtt-cnt-sun-tt

Remove

the

shield

plate.

Take

the

tubes

out

their

case

(Refer

Fig.

2-2).

handling,

sure

hold

them

the

glass

envelope,

not

the

plate

cap.

Carefully

index

the

pins

each

tube

into

its

socket

and

insert

gently

without

excessive

force.

INSERT

UPPER

4mm

CASE

COVER

ical

LEADING

EDGE

INTO

FRONT

PANEL

TOP

LIP

HIGH

VOLTAGE

PRIMARY

PROTECTION

SWITCH

PLUNGER

}

3mm

FLAT

HEAD

SELF-TAPPING

SCREW

PCS)

cree

INsiDe

HIGH

VOLTAGE

184

[SHIELD

PALTE

SECONDARY

PROTECTION

SWITCH

PLUNGER.

UPPER

CASE

Figure

2-1

COVER

INSERT

Upper

Case

Cover

ata

Assembly/Disassembly.

SWITCH

USE

Phillips

PLUNGER

Screwdriver.

Figure

2-2

—

Correct

Power

Tube

Handling

CAUTION

Particular

care

should

taken

not

strike

and

break

the

glass

tubes

during

installation.

Tube

break-

age

due

negligence

not

warranteed

(Refer

Fig.

2-3)

Temporarily

fix

each

parasitic

sup-

pressor

coil

the

plate

cap

with

the

letter

“R’”

“L”

facing

up.

this

time,

not

tighten

the

screw

and

spring

washer,

but

snug

them

the

coil

may

adjusted.

Mount

the

plate

cap

with

parasitic

suppressor

coil

each

tube

observing

the

right

hand

and

left

hand

coil

designations.

the

screw

holes

not

align,

shape

the

coil

slight

bending

extending

hand

for

precise

installation,

keeping

the

coil

below

the

level

the

plate

cap.

CAUTION:

Particular

care

should

exercised

not

applying

excessive

force

the

tubes.

Carefully

tighten

the

screws

each

end

the

coil

while

holding

the

plate

cap

hand.

10.

Tighten

the

plate

cap

screw

using

the

small

standard

screwdriver.

11,

Check

assure

correct

installation

reference

Fig.

3-3.

NOTE:

Before

installation,

check

each

parasitic

suppressor

coil

for

good

alignment

prevent

the

application

excessive

force

the

tubes.

Letters

“'R’

and

“’L”

the

coils

should

face

up.

Temporarily

install

each

coil

their

plate

caps

before

final

tightening.

Use

Philips

screwdriver.

Figure

2-3

—

Parasitic

Suppressor

Coil

Mounting

Tube

Installation

Checkout

avoid

damage

necessitating

tube

replacement,

please

check:

Power

tubes

are

free

from

scratches

other

physical

defects.

Tubes

are

fully

inserted

into

their

sockets.

Plate

cap

screws

tightened

securely.

—

Screws

both

ends

the

parasitic

suppressor

coils

are

tightened

securely.

Washers,

screws,

drivers

and

any

other

unneces-

sary

material

not

left

inside

the

unit.

Refer

Fig.

2-1.

The

inside

shield

plate

includes

the

high

voltage

secondary

protection

switch

plunger

bakelite

bar.)

Position

the

plate

that

the

plunger

will

securely

engage

the

spring

plate

for

ungrounding

the

plate

high

voltage.

Install

the

upper

case

cover

with

its

leading

edge

in-

serted

(approximately

mm)

into

the

front

panel

lip.

This

cover

has the

high

voltage

primary

protective

switch

plunger.

Position

the

cover

the

plunger

will

engage

the

microswitch.

2.3.

GENERAL

TIPS

INSTALLATION

Install

dry,

well-ventilated

area,

shaded

from

direct

Sunslight.

Your

TL-922A

must

have

minimum

clearance

the

rear

allow

hot

air

70°C

exhaust.

Choose

operating

position

capable

safely

supporting

the

weight

the

TL-922A

(31

kg),

plus

all

the

other

station

equipment.

Level

your

TL-922A

operation.

The

heated

electrodes

each

power

tube

will

distorted

gravity

resulting

shortened

service

life,

slanted

beyond

10°.

2.4

POWER

SOURCE

Use

power

line

having

sufficient

current

capacity

the

performance

your

TL-922A

will

adversely

affected

inadequate

line

regulation.

the

worst

case,

not

deviate

than

+10%

from

the

rated

input

voltage

for

which

your

Amplifier

has

been

set.

2.5

LINE

VOLTAGE

CHANGE

WARNING

DISCONNECT

THE

INPUT

POWER

CABLE

FROM

THE

TL-922A

BEFORE

PROCEEDING.

The

input

voltage

can

changed

either

240V

120V

required,

changing

the

power

transformer

input

links

located

the

duct

the

rear

panel.

NOTE:

The

TL:922A

was

factory

set

the

240V

position.

change

link

positions,

remove

the

access

cover

the

two

black

snap

fasteners.

Loosen

the

screws

holding

the

shorting

bars,

few

turns

only.

(Do

not

loosen

excessively

they

could

drop

into

the

Amplifier.)

Draw

each

shorting

bar

upward

for

removal.

Replace

the

shorting

bars

for

the

operating

voltage

desired

illustrated

Fig.

2-4.

Tighten

firmly.

Also,

sure

tighten

the

screws

from

which

the

shorting

bars

were

removed.

NOTE:

Fuses

need

not

changed

current

rating

when

the

input

voltage

changed.

CAUTION:

Excess

force

may

break

the

terminal

strip.

2.6

POWER

CABLE

The

power

cable

supplied

with

your

TL-922A

has

plug

its

end.

Connect

plug

mating

with

the

wall

outlet.

The

blue

and

brown

leads

are

power,

the

green

lead

ground

illustrated

Figure

2-5.

2.7

EXCITER

Amateur

band

SSB

transmitter

transceiver

having

output

impedance

502

and

output

power

80W

120W

sufficient

drive

the

TL-922A.

Exciter

output

exceeding

120W

will

cause

overdrive,

resulting

shortened

power

tube

life

and

distorted

output.

limit

the

power

level

above

120W,

use

exciter

having

external

ALC

input

terminal.

CAUTION:

SURE

TIGHTEN

ALL

LOOSENED

SCREWS.

Use

Philips

screwdriver.

Spare

shorting

bars

are

secured

terminals

and

240V

setting

120V

setting

Figure

2-4

—

Input

Voltage

Terminal

Boards

Trio-Kenwood's

transceivers

Series

TS-930, TS-830,

TS-820,

TS-530, TS-520,

TS-430, TS-180, TS-130,

TS-120

and

TS-900

and

transmitters

Series

TX/T-599

are

all

suitable exciters

and

will

match

the

TL-922A

de-

sign

well

appearance.

2.8

ANTENNA

Your

TL-922A

requires

antenna

having

752

impedance

and

providing

is:

(1)

Rated

for

P.E-P

input

power

(2)

and,

exhibits

low

standing-wave

ratio

(SWR)

Desired

SWR

1.5

less.

higher

SWR,

may

cause

difficult

matching

with

your

TL-

922A.

Excessive

SWR

could

melt

the

coaxial

cable

and

antenna.

protect

your

TL-922A

against

adverse

SWR

effects,

use

antenna

tuner.

Note

that

feeder

radiation

due

mismatching

will

cause

TVI,

BCI,

similar

RFI.

BLUE

BROWN

240/120V

LINE

GROUND

GREEN

Figure

2-5

—

Power

Cable

Color

Code

EXCITER

TbooA

TRANSMIT

CONTROL!

IDO

ras

RELAY POWER

SOURCE

RECEIVE

ALC

CIRCUIT

cea

CONTROL

ALC

Figure

2-6

Exciter

Connections

for

and

ALC

Controls.

2.9

INTERCONNECTION

2.9.1

GROUNDING

Connect

the

GND

posts

the

TL-922A

and

exciter

RFI.

prevent

possible

electric

shock

and

The

wire

used

should

thick

and

short

possible

and

run

good

earth

ground.

2.9.2

CABLE

CONNECTION

Interconnect

your

TL-922A

and

exciter

with

the

supplied

cables

illustrated

Figure

2-7.

NOTE:

you

use

exciter

another

brand,

replace

the

supplied

connector

with

one

appropriate

your

exciter.

The

exciter

used

must

the

negative-going

ALC

voltage

from

the

TL-922A.

(The

ALC

output

signal

input

normally

positive

when

not

connected

the

exciter.)

The

RL,

standby

control,

the

exciter

must

switched

ground

transmit

mode,

illustrated

Figure

2-6.

NOTE:

Use

RG-8/U,

RG-11/U

heavier

antenna

cable.

NOTE:

SWR

meter

connected

between

the

TL-922A

and

the

exciter,

total

co-

axial

cable

length

must

not

exceed

1.7

Figure

3-1

Front

Panel

View

3.1

FRONT

PANEL

Meter

The

meter

reads

the

plate

current

flowing

through

the

power

tubes.

AIR

Indicator

The

AIR

indicator

lights

the

on-the-air,

transmit

MODE.

PLATE

Tuning

Control

This

control

permits

you

tune

the

plate

circuit

the

desired

transmit

frequency,

and

equipped

with

reduction

gear

for

easy

tuning.

Multimeter

The

Multimeter

can

read

the

(grid

current),

(relative

power

output),

(plate

voltage)

selected

the

METER

switch

STBY

Indicator

With

the

unit

turned

on,

shows

unkeyed

receive

state.

LOAD

Control

Impedance

matches

the

network

the

antenna.

POWER

Switch

double

pole

switch

completely

disconnects

the

input

from

the

transformers.

MODE

Switch

Set

for

SSB

CW.

For

RTTY

operation,

set

the

switch

the

position.

10.

11,

METER

Switch

Selects

(grid

current),

(relative

power

output),

(plate

voltage).

BAND

Selector

Set

for

the

Amateur

band

which

operation

desired.

LINEAR

Switch

the

STBY

position,

the

exciter

runs

straight

through.

the

OPERATE

position,

the

Amplifier

automatically

keys

with

the

exciter.

Figure

3-2

Rear

Panel

View

3.2

REAR

PANEL

Cooling

Fan

The

Cooling

Fan

cools

the

power

tubes

and

effectively

keeps

the

inside

temperature

from

increasing.

careful

hot

air

(50°

70°C)

the

exhaust

port.

Line

Voltage

Change

Terminals

These

terminals

are

located

behind

the

rear

cover,

which

removed

pulling

the

two

snap

fasteners.

For

input

voltage

change,

please

refer

Section

2.5.

Serial

No.

Plate

This

plate

stamped

with

the

Serial

Number

your

TL-922A.

METER

Control

This

control

used

calibrate

the

output

read-

ing.

For

calibration,

see

Section

4.6.

ALC

ADJ

Control

This

control

used

adjust

the

ALC

voltage.

For

adjustment,

see

Section

4.5.

ALC

OUT

Jack

This

jack

feeds

the

ALC

voltage

out.

CONT

Jack

This

jack

inputs

the

transmit-receive

relay

switching

ground

from

the

exciter

10.

11.

12.

INPUT

Connector

This

UHF-type

connector

inputs

the

signal

fed

from

the

exciter.

Use

the

supplied

cable.

OUTPUT

Connector

This

UHF-type

connector

feeds

the

output

the

antenna.

GND

Post

Use

this

post

ground

the

TL-922A

your

exciter

and

station

ground.

FUSE

Holders

(2)

Each

contains

fuse.

either

both

fuses

are

blown,

determine

the

cause

before

replacement.

POWER

Cable

power

supplied

the

amplifier

three-wire

cable.

(See

section

2.6)

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