GENERAL RADIO COMPANY 1263-8, 1263-B Operating Instructions Manual

OPERATING

INSTRUCTIONS

TYPE

1263-8

AMPLITUDE-REGULATING

POWER

SUPPLY

GCN£RAL

D

RADIO

COMP

A

NY

OPERATING INSTRUCTIONS

TYPE

1263-B

AMPLITUDE-REGULATING

POWER

Form

July,

SUPPLY

1263-0110-D

1962

GENERAL

WEST

CONCORD,

RADIO

MASSACHUSETTS,

COMPANY

USA

Copyright

West

1961 by

Concord,

General

Massachusetts,

Radio

Company

USA

Figure 1.

Panel

view

of1'ype

1263-IJ

Amplitude-Regulating

Power

Supply.

Rf

Output

50 ohms for
below),
fier.
to

1.0

Rf

Output Regulation:

put
to

within
monics.
to

2000
used
rectifier

Modulation

Voltage:

any

and a Type

With 1-kc

volt

behind

of

recommended

±5%
This
Me

if

and a correction

frequency

Frequency:

±5%,

stable

range

of

line

Duty

Ratio:

pensate

Rise

for

and

oscillator

Decay
Overshoot:
Ramp-off:
Gate

terval

recommended

the

300 pf.

50

f.Lsec

terval

Plate

Heater-Supply Output: 6 v ±10%

5.4v

Response Time:

in

oscillator
within
with 1-kc
blanking
tion
wave

Less

Voltage:

of

modulation,

Rise

each.

of

modulation

Supply Output: 0

±10%

at

0.5

msec

modulation.

is

less

less

than

modulation.

0.2

recommended

874-VR

square-wave

50

ohms.

Unit

including

regulation

proper

characteristic.

1-kc

square-wave,

to

within 5 cps

voltage.

0.5

to

0.53,

Times:

None.

than

Synchronized

load

and

decay

Gate

0.7

amp.
For

output,

correction

with

than 2 msec

200

msec

to

2.0
oscillator

Voltmeter

modulation,

Below

500 Me,
Oscillators
the

effects

can

be

low-pass
applied

for

over

adjustable

starting

50

delay.

f.Lsec

0.5%.

exceeds 1 volt

of

30

k.O

times

output

during

is

less

than

to

300

volts

a 2-to-1

cw

operation,

Recovery

with

with

SPECIFICATIONS

volts

attained

rf

the

with

shunted

are

at

step

is

1-kc

behind

(see

Recti-

0.2

rf

out-

is

held

of

har-

filters

are

output-

adjustable

the

rated

to

com-

each.

"off"

in-

into

the

less

than

"on"

in-

.01

volt.

at

30 ma.

0.5

amp,

variation

completed

50

msec

time

after

cw

opera-

square-

up

by

Hum

and

±3%

is

provided.

is

Noise:

is

with

better

modulation
than

Output Voltmeter:

cuit
ization
when a correction
characteristic

Tube Complement:

5963,

6V6GT,

Power Input: 105

50

to

60

cps,

Accessories

Wire

Power

lation

Other

Voltmeter
Cord
874-T
in

sweeping

Recommended

to

250 Me),
Type
(450
Me),
(0.5

to

Other

1750-A
matic
attenuato;s,
adaptor

Mounting: Aluminum
Dimensions: Width

inches

Net

Weight:

Cord,

jack

on

Accessories

Rectifier,

for

connecting

for

monitoring

applications.

1209-B

to

1050 Me),

and

for

50 Me).

Accessories

Sweep

operation.

filters,

panels

(205

14~

Peak

less

than

1-kc

Internal

Accuracy

than

at

extremely

Four

OA2.

to

125

55

watts

Supplied:

connector

oscillator,

Required:

output

Oscillators:

Type

1209-BL

(250

to

Type

cw

operation

Drive

is

Coaxial

adaptors,

are

available.

by

180

pounds

residual

±0.3% on

square-wave

standardizing

after

± 10% of

is

applied

high

12AX7,

(or

210

maximum,

Type

CAP-22

cable

spare

Type

874-R22

rectifier,

oscilloscope

Type

(180

920 Me),

1218-A

only

Available:

recommended

Cables,

and

panel

and

8,

height

by

235 mm),

(6.6

kg).

hum

and

cw;

modulation.

standard-

indication

for

rectifier

frequencies.

one

to

250).

at

full

Three-

for modu-

fuses.

Type

874-VR

and

connection

1215·B

to

600 Me),

Type

1361-A

(900

to

Type

1211-B

The

for

connectors,

relay-rack

cabinet.

7,

depth

over-all.

noise

less

cir-

each

volts,

load.

Patch

Type

(50

2000

Type

auto-

9XI

1.1

PURPOSE.

The

designed

similar
the
age
age

when
oscilloscope
for
cillators).
negative

2, a

Type

Type

for

with

with

because

power

plate

current

at a constant

in

frequency-response

the

oscillator

application

de

Type

1750-A

1263-B

use

with

the

Types

manually

For

fast

Section

INTRODUCTION

Type

1263-B

to

operate

requirements.

or

recorder.
of a modulating

There

potential

1263

-B

Sweep

Amplitude-Regulating

oscillators

907-R

operated

most

swept-frequency

regulating

Amplitude-Regulating

General

supplied

preset

frequency

must

Amplitude-Regulating

to

level.

The

also

proportional

Drive,

driven

and

908-R

oscillators.

action

Radio

Unit

This

power

an

oscillator
This

constant

measurements,

dial

is

mechanically

oscillator

voltage

be

available

driving a Type

by

applications,

is

(as

to

the

Power

the

Type

Dial

Drive s

possible.

1

Power

Oscillators

supply

to

maintain

output

:;~nd

is

must

have

have

General Radio

an

output
oscillator
Power

Supply

Supply

1209-B Unit

was

1750-A.

(see

cw

However,

Supply

automatically

particularly

swept

suitable

rectifier

rf

designed

It

paragraph

operation

or

oscillators

the

rf

is

of

great

for

output.

is

shown

Oscillator.

is

equally

in

this

(Figure

output

use

connections

to

is

instrument,

1)

is

with

adjusts

volt-

advant-

important

with an

Unit

Os-

supply

In

Figure

with a

The

especially

useful

1.3.6)

and

desirable

a

Figure
Amplitude-Regulating
Power
Type

f>rive

Type

Oscillator.

2.

Type

126 3-B

Supply

1750-A

shown

1209-H Unit

and

Sweep

driving

a

GENERAL

RADIO

COMPANY

internal
tector
amplifier.

Output
at

1.2

1-kc

off-on

such

as

The

Type

voltage

30 rna;

and

heater

DESCRIPTION.

an

1.2. 1 CONTROLS.

plitude-Regulating

Name

POWER

Description

Two-position
toggle-switch
with
light

Two-position
toggle-switch

Five-position
selector

switch

modulation

rf

demodulating

1263-B

supply, 6 volts

current

The

Power

pilot

also

specifications

following

Supply:

POWER,

CW-1
MOD

ZERO,
CAL,
UN

is

provided

rectifier

supplies

at

0. 5

controls

Positions

kc

OPERATE

REG

heater

are:

amp.

OFF

rLJ

CHECK

for

use

followed

voltage

plate

are

on

Turns

Selects
wave

Permits
be

with

without
nections
switches
trol.

with

a

sensitive

by a 1-kc

to

the

supply, 0 to

the

Type

1263-B

Function

power

cw

or

modulation.

output

checked

output

and
rectifier

disturbing

to

oscillator,

off

de-

selective

oscillator.

300

volts

Am-

on

or

off.

1-kc

square-

voltmeter

calibrated

in

any

amplitude

to

use,
con­and
con-

ZERO

CAL

OUTPUT
VOLTAGE

ADJ

MOD

FREQ
INCREASE

DUTY
RATIO

Recessed
thumb-set
control

Recessed
thumb-set
control

Continuous
rotary

control

Continuous
rotary

control

Recessed
thumb-set
control

Output-voltmeter
justment.

Output-voltmeter
tion

adjustment.

Sets

output

Adjusts
quency

Permits
wave
appreciable

oscillator.

modulating

over

symmetrical

modulation

zero

calibra-

level.

narrow

even

starting

ad-

fre­range.

square-

with

delay

in

2

TYPE

1.2.2

Amplitude-Regulating

1263-B

CONNECTORS.

AMPLITUDE-REGULATING

The

Power

following

Supply:

connectors

POWER

are

on

SUPPLY

the

Type

1263-B

Name

POWER

MODULATION

OUTPUT

RECTIFIER

BLANKING

GATE

Description

Four-terminal
socket

Two-terminal
plug

Recessed
Type

874
Coaxial
Connector

Telephone-

tip

jacks

(two)

Phone

Three·termi-

nal

jack

plug.

Direct
cables
tors.

Connection
oscillator.
cillators,
with
telephone

Center
rectifier,
tifier

Connection
blank

in

turn
base

Modulation-gate

chronous
Connection

tachable

plug-in

of

General

connection

two-terminal

plug

conductor

shield

ground.

or

cut

sweep

applications

trace

line

demodulator

line

and

on

to
For

for

off

sweep

for

cord.

Function

connection

Radio

modulation

General

socket

on

other

connects

connects

an

external

oscillator

provide a zero

output

ac

power,

for

Unit

terminals

Radio

is

via

on

end.

to

to

eliminate

display.

for

system.

through

to

contactor

output.

use

power

Oscilla-

Unit

patch

cord

one

end

output

output-rec·

Used

re-

reference

with

de·

of
Os·

and

to

syn-

1.2.3

METER.

age,

and

is

ply.

The

volts

of

rf

2

volts.
ized
switch,
paragraph
the

1.2.4

instrument.
and

An

with a particular

calibration

oscillator.

FUSES.

slow-blow

The

the

means

meter

is

output.

internal

1.2.1)

can

Line

Slow-blow

0.4-ampere

OUTPUT

of

checking

an

internal

The

quasilogarithmic

calibration

output

and

zero

be

made

fuses

are

0.8-ampere
fuses

VOLTAGE

the

regulating

de

vacuum-tube

circuit

rectifier.

adjustments

quickly

accessible

are

permits

without

fuses

used

3

meter

scale

By

means

(thumb-set

from

are

used

for

230-volt

indicates

action

voltmeter,

covers a range

the

disturbing

the

for

theoutput

of

the

meter

to

of a panel

controls;

connections

left-hand

115-volt

operation.

calibrated

power

from 0

be

standard-

selector

refer

side

operation,

of

volt-

sup-

in

to

to
to

the

1.3

ASSOCIATED

1.3.1

UNIT OSCILLATOR.

eral

Radio

An

lator

will

lating

Power

cable

or
Types
1263-B
able

1208-A

Amplitude-Regulating

power

connection

Unit

Oscillators:

Type

No.

1211-B*
1215-B
1209-BL
1209-B
1361-A
1218-A**

earlier

"A"

operate

Supply

is

adapted

and

requirements

can

be

GENERAL

EQUIPMENT.

0.5

model

satisfactorily

if

the

telephone

to

connect

-B

Unit

can

made

to

the

RADIO

The

following

Frequency

to

5 Me; 5

50

to

180

to

250

to

450

to

900

to

of

the

Type

with

to

the

Oscillators

Power

be

operated

cathode

COMPANY

is

a

Range

to

50

Me

250

Me

600

Me

920

Me

1050

Me

2000

Me

1211, 1215,

the

Type

plug

is

removed

screw-terminals

cannot

Supply.

circuit

from

to

Other

this

apply

list

of

recommended

or

1263-B

from

on

be

used

oscillators

power

plate-current

Gen-

1209

Unit

Oscil-

Amplitude-Regu-

the

modulation

the

oscillator.

with

the

Type

with

suit-

supply

if a de

control.

1.3.2 OUTPUT RECTIFIER.

Rectifier
range
nector
for 50-ohm
exceed
than
trol
crystal
sponse
power

and

1.3.3 OUTPUT

ics,

output
are

•

Not

..

For

1218-A

is

recommended

of

0.5

to

2000 Me.

of

General

coaxial

40,000

10

percent

amplifier;

diode

time

supply.

ohms.

at

this

is

is

essentially

The

oscillation)

a

low-pass
rectifier

(refer

recommended:

Type
Type
Type
Type

recommended

both

selector

cw

for

and

square-wave

switch

Radio

Unit

cable.

The

frequencies

condition

used.

With

stability

is

established

FILTER.

filter

can

to

87

4- F 185
87 4-F 500
874-F1000
874-F2000

modulated

to

CW.

for

It

The
ripple

determined

be

Section

operation

modulated

The

General

use

as

the

can

be

plugged

Oscillators,

backresistance

in

the

above

0. 5 Me

is

satisfied

the

Type

of

the

control

by

this

To

minimize

used

between

5).

The

185-Mc
500-Mc

1000-Mc

2000-Mc

•
operation

RadioType

output

rectifier

directly

and

provides a matched
of

output

of

to

prevent

the

when a Type

874-VR

by

the

Voltmeter

internal

system

compensation.

errors

due

the

following

Low-Pass
Low-Pass

Low-Pass
Low-Pass

with

the

874-VR

over

into

the

crystaldiode

rectifier

overloading

874-VR

compensation

(freedom

to

oscillator

oscillator

General

Filter
Filter

Filter
Filter

Type

1263-B,

Voltmeter

the

frequency

the

output

must

with a good

Rectifier,

from

output

Radio

set

con­source
should

be

less

the

con-

there-

in

the

hunting

harmon-

and

filters

the

Type

the

4

TYPE 1263-B AMPLITUDE-REGULATING

POWER

SUPPLY

1.3.4 MATCHED DETECTOR.

frequency

874-VQ

Unit,

signal.
Voltmeter
series

imize

A

block

Type

the

output
Amplitude-Regulating
(874-VR)
vice

meter

1.3.5

be

used

sweeping
This
oscilloscope
driven

1.3.6

axis

plotter

and

908-R96

ard

General

Drive)

used

characteristics

Voltmeter

can

be

used

The

Type

Rectifier

50-ohm

discontinuity

diagram

874-F185

of a Type

to

the

under

test

Detector

SWEEP

with

DRIVE.

oscillators

frequency

sweep

drive

deflection

dial.

DIAL

DRIVE.

is

an

Dial

Radio

dials.

with

any

of

Detector,

at

874-VQ

(paragraph

resistor

produced

of

the

Low-Pass

1215-B

device

is

detected

and

the

source

also

invaluable

Drives

4-inch

The

Type

the

oscillators

of

the

output

Voltmeter

and

does

set-up

Filter

Unit

Power

under

by

characteristics

The

General

operating

with

has a blanking

voltage

For

permanent,

accessory.

are

(Type

1263-B

In

setups

various

terminated

of

elements

in a Type

the

unknown

Detector

1. 3. 2),

by

for

contain

the

shunt

plotting

is

shown

except

compensating

reactance

Oscillator,

Supply,

test
the

is

fed

(874-F185).

properly

are

Radio

Type

from

the

constant

rf

voltage

synchronized

precise

The

General

designed

907-R

to

sweep

Drive)

Amplitude-Regulating

listed

in

paragraph

for

measuring

and

networks, a Type

874-WM

to

measure

is

similar

that

it

to

the

does

elements

of

the
frequency
in

Figure

regulated

through

terminated

plotted

power

output

and

characteristics

3. In
by

the

the

The

output

Type

on

an

x-y

1750-A

Sweep

supply

over

the

provides a cathode-ray-

with

the

recording

Radio

equipment

and

6-inch

1.3.1,

transmission

Termination

the

output

Type

874-VR

not

contain

to

crystal

output

this

Type

from

diode.

diagram,

1263-B

rectifier

the

874-VQ

plotter.

Drive

to

produce

sweep

position

of

Types

Power

will

data,

907-R144

using

(Type

provide

range.

of

a two-

stand-

908-R

Supply,

or

min-

of

de-

Volt-

can

the

a

a

a

a

DC

SUPPLY

AMPLITUDE

REGULATING

POWER

OSCILLATOR

908-R96

-

Figure 3.

TYPE

1263-B

SUPPLY

!

TYPE

1215-B

UNIT

).-

i

TYPE

DIAL

DRIVE

r-

Typical

TYPE TYPE

874-VR

VOLTMETER

RECTIFIER

setup

r-

"X"

for

DEVICE

UNDER

TEST

874

-F185

LOW

PASS

FILTER

AXIS SIGNAL

plotting

5

I

TYPE TYPE

874-VQ

-

VOLTMETER

DETECTOR TERMINATION

frequency

1--

characteristics.

"y" AXIS

874-WM

5011

SIGNAL

XY

PLOTTER

GENERAL

RADIO

COMPANY

constant
indication
Type
with

output

908-R96

the

detected

of

voltage
relative
Dial

Drive

output

in

order

that

response.

is

shown

of a low-pass

1.3.7 SENSITIVE DETECTOR. A

lowed

be

used

Type

by a Type

for

1263-B

1232-A

increased

is

applied

Tuned

detector

to

the

Amplifier

sensitivity

oscillator.

Section 2

THEORY

OF

the

final

recording

In

the

block

diagram

driving a Type

filter

plotted

Type

874-VQ

and

Null

when

1-kc

OPERATION

will

1215-B

Voltmeter

Unit

by

an

Detector

modulation

be a direct

of

Figure

Oscillator,

x-y

plotter.

Detector

tuned

3, a

to 1 kc

from

fol·

the

2.1

GENERAL.

In
lating
lator

to

sistance
of
de
sponds

This

the
and
produces
at

maintained

is

limited

Power

output

the

oscillator

300

volts

reference

to

power

frequency

possible

all

frequencies

-In

the

one-half

to 1 volt

the

cw

Supply

rectifier

presented

at

30

potential

an

rf

output

supply

range

errors

at

least 2 volts

1-kc

and

the

the

"on"

with

mode

of

operation,

compares

with a de

plate

supply

to

the

output

milliamperes

is

adjustable

of 0

will

maintain

(subject

of

the

output

with a 300-volt,

within

modulated

carrier,

level

the

its

or
of

recommended

the

de

reference

to

minimize

rectifier

is

available

to 2 volts

any

to

additional

rectifier),

range.

mode

of
average
the

rf-modulated

6

the

Type

potential

potential,

the

is

100,000

for

from 0

with

the

preset

operation,

rf,

level

variations

provided

30-milliampere

level

oscillators.

1263-B

developed

and

difference.

the

to

2.5
normal

the
is
output.

Amplitude-Regu-

applies a correction

ohms.

oscillator

volts,

output

within 2 percent

due

that

regulating

controlled.

Carrier

by

the

The

load

A maximum

plate.

which

rectifier.

to

harmonics

the

oscillator

plate

supply

action

This

output

oscil-

re-

The

corre-

over

is

level

is

TYPE

1263-B

AMPLITUDE-REGULATING

2.2 CIRCUIT.

The

elementary
ciples
a
output.
grid

potential

increase

respect
plifiers,
amplifier

Conversely, a decrease
applied.
a

effect

described

only

interrupted
or

resistors
quency
For
ulation

of

negative

of

the

to

preset

rf

With

the

carrier

and

cw

operation,
ceases.

operation's

de

potential

This

potential

first

is

applied

in

the

negative

the

reference

and

appears

grid.

This

This

closed-circuit

level.

blanking.

internal

above

continues

average

with a 1-kc

level

in

the

duty

difference

to

An

external

1-kc

de

of

the

1-kc

ratio

the

schematic

of

the

power

proportional

is

applied

amplifier.

the

other

potential

potential,

as

an

increased

reduces

in

the

output

feedback
contactor

square-wave

except

from

the

square

wave.

oscillator
multivibrator
of

the

square-wave

multivibrator

diagram

supply.

to

grid

developed

is

plate

produces

that

output

output

circuit

is

(Figure

The

to

the

rf

the

voltmeter

An

adjustable

of

the

first

amplified

negative

current

system

shorts

modulation,

an

RC

rectifier,

Under

these

voltage

permit

modulation

biased

POWER

4)

output

amplitude

difference

by

the

by

the

potential

supplied

an

increase
holds

the

reference

the

filter

is

and

conditions,

is

adjustment

to

the

SUPPLY

illustrates

rectifier

at

the

amplifier

negative

output

two

the

switched

the

regulated.

over a narrow
"on"

and

amplifier.

rectifier,

difference

at

the

to

the

oscillator.

in

plate

output

potential

regulating

in

plate

the

of

state

the

prin-

develops

oscillator

to

one

reference

An

with

am·

output·

current

close

action

to

pass

supply

average

Variable

the

fre·

range.

and

mod-

to

to

is

Figure

1

I

I

I

I

I

:

L-----------------------------------------------------------J

4. EleT(lentary

Type

1263-B

....

,..,...~

..

Amplitude-Regulating

Power

Supply.

,...

Schematic

for

7

I T

L

________

-250v

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50v

1-150¥

-2.50v

J

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2.3

RESPONSE

In

swept-frequency

put

is

likely

be

nearly
Supply.
since

the

cw

operation

put

voltage
contacts
milliseconds
modulation

creased

can
with
lation,
than

the

to

With

be

swept

satisfactory

the

10

seconds,

ranges

TIME.

to

occur,

eliminated

Cw

operation

most

rapid

the

Type

in

less

than

in

the

sweep-drive

after

blanking

the

response

about

50

cw

operation

through

regulation.

entire

with a sweep

ranges

although

GENERAL

applications,

particularly

by

the

is

recommended

regulator

1263-B

0.5

millisecond.

and

and

200
the

recommended

their

of

good

time

RADIO

in

the

Type

1263-B

response

will

correct

mechanism,

is

removed.

recovery

milliseconds,

entire

To

the

as

times

ranges

ensure
oscillators
regulation

low

as

COMPANY

rapid

variation

uhf

range.

Amplitude-Regulating

for

most

sweeping

is

obtained

a 2-to-1

If

blanking
regulation
With

of

respectively.
General

in

less

complete

should

can

two

seconds.

step

is

is

internal

the

power

Radio

than

regulation

not

be

obtained

in

applied

of

oscillator

This

this

of

oscillator

restored
1-kc

supply

Unit

one-half

be

swept

out-

variation

Power

applications

mode. With

out·

by

shorting

within

square-wave

are

Oscillators

second

with

modu-

in

less

over

most

can

2

in-

of

3.1

CONNECTIONS.

3.1.1

POWER

cillator
of
LATION

cillator.

the

power

power

plug

Excessive
can

the

lator,
made. When

tum

while

AND

cable

supply.

on

the

damage

power

output

the

selector

changing

Section

INSTALLATION

(Refer

MODULATION

into

With

power

voltage,

crystal

supply

also

the

multipoint

the

supply

diodes.

until

rectifier,

using

the

switch

frequency

to

Section

CONNECTIONS.

patch

cord

to

the

CAUTION

even

if

applied

Do

all

connectio.ts

and

power

Type

on

the

range.

8

connector

1211-B

power

3

1.3.)

supplied,

modulation

for a

not

apply

between

supply

Vnit

supply

Plug

on

the

right-hand

connect

jack

of

short

ac

power

oscil-

have

Oscillator.

to

ZERO

the

the

the

time,

to

been

Unit

MODU-

Unit

Os-

side

Os-

TYPE

3.1.2

OUTPUT-RECTIFIER

Cord,

connect

to

the

de

output

The

Type
output
output
should
line. A Type
sories
Adaptors
table

3.2

ments
permits

0.5
ments

pere.

quirement

plied
ducts.
in
plied

lator

for

the

the
the

rear

connector

filter

face

for

connecting

are

of

Type

HEATER-SUPPLY

There

of

the

satisfactory

ampere

a.

b.

c.

the

d.

normal

Type

e.

jumper

top

after

with

for

oscillators

Types

Type

is 6 volts

Type

by

Type

Oscillator

rectifier

to

the

Type

reduces

use.

1361-A

Oscillators

that

center

the

1263-B

interposed
the

AMPLITUDE-REGULATING

the

OUTPUT

(side

connector)

874-VR

load

874-EL

available

874

should

of

the

oscillator,

(refer

to

provide a matched

90 ° Ell

and

supporting

for

Accessories

VOLTAGE

is a considerable

various

1209-BL,

1211-B:

1218-A:

tube.

1361-A: 7

the

dust

the

nominal

1263-B

current

and

associated

voltage

If

the

Oscillator,

requiring

connects

of

the

cover

Unit

Oscillators. A compromise

operation

are

met

1209-B,

5.4

at

0. 75

has

Power

requirement

volts

at

Type

the

Type

and

CONNECTION. With a

RECTIFIER

of

the

be

connected

to

Section

and

connectors

at

the

Type

either

Type

the

other

rear

connector

874-VR

as

by

5).

The

source

874-Z

output

than

of

this

ADJUSTMENT.

variation

without

line-supply

as

follows:

and

volts

at

ampere).

internal

Supply

filter

at

135 rna.

the

tube

1263-B

remove

less

than

terminals

1263-B.

V2

are

0. 7

heater

Power

the

removed.

in

adjustment.

voltage.

1215-B:

ampere

rectifier.

is

chosen

is

less

is

such

Voltage

to

6. 7
Supply

jumper

0.2

ampere

of

This

jumper

volts,

the

POWER

Type874-R22

of

Voltmeter

close

direct

resistor

for a 50-ohm
Stand
filter

Type

manual.

the

heater-current

Output

Heater-current

6.3

volts

satisfactory

Polarity

so

that

than

0.2

that

proper

drop

which

is

to

as

described
at

6.3

electrolytic

is

accessible

SUPPLY

the

as

possible

plug-in

end

are

useful

and

Type

874.

in

voltage

at

0.3

this

ampere.

voltage

within

is

be

used

volts:

Patch

Type

1263-B

Rectifier.

to

or

with

marked

coaxial

acces-

874-VR.

Refer

to

require-

supplied

is 6 volts

require-

to

0.4

(nominal

of

de

rectifier

The

is

the

oscil-

satisfactory

only

below.

Remove

capacitor

from

the

an

R

the

at

am-

re-

sup­con-

drop

sup-

with

at

the

9

GENERAL RADIO COMPANY

Section 4

4.1

INITIAL

After

the

output

at

least a 2-minute

a.

thumb-set

dication.

trol

b.
c.
d.

voltage

by

advancing

ply

this
drop-out
change

greater

into
the
coupling

minimum

level,

put

meter
condition.

justable
Once
oscillator
tuation

rectifier

Standardize

(1) With

control

(2)

Turn

(3)

Turn

to

produce
Turn
Select
Set

the

is

indicated

output.

point

in

level

If,

with

than

oscillation.

output

coupling.

(control

setting,

then

remain

will

suddenly

output

the

adjustments
dial

in

output

meter

OPERATING

ADJUSTMENT.

the

proper

the

the

the

the

the

selector

CW

OUTPUT

the

of

normal

desired,

Then,

All

General

through

(refer

warm

the

output

selector

to

zero

selector

selector

same

or

1-KC

on

OUTPUT

As

the

the

regulator

down

to

plate

the

This

as

the

or

loop

the

indicated

constant

if

jump

coupling

have

the

voltage.

connections

to

paragraphs

up,

and

voltmeter.

switch

the

meter.

switch

switch

indication

switch

ru

VOLTAGE

the

meter.

VOLTAGE

normal

this

point,

supply,

control

condition

oscillator

on

the

over a part

the

coupling

up

or

Radio

system,

been

entire

have

check

in

to

CHECK

to

CAL

as

to

OPERATE.

MOD.

control

If

oscillator

will

occur

if

the

system

can

easily

output

oscillator

voltage

down,

Unit

Oscillators

so

that

made,

frequency

PROCEDUR1E

been

made

to

the

1.3

and

3.1),

apply

operation

the

ZERO

noted

it

is

control,

output

the

system

output

may

should

of

the

can

indicating

the

it

should

as

position,

and

observe

and

turn

in

(2).

so

that

impossible

the

oscillator

coupling

abruptly,

is

from

the

become

be

observed

coupling

itself)

be

range

is

rise

range

advanced

the

are

above

be

with

follows:

turn

the

CAL

the

desired

to

reach

is

with

operating

oscillator

unstable

by

is

varied.

increased

to

the

of

the

far

unstable

equipped

tests

possible

no

noticeable

oscillator

power,

the

the

meter

thumb

operating

this

cannot

reduced,

no

noticeable

properly.

is

and

the

action

from
desired
oscillator

enough,

oscillating

with

can

be

to

turn

and

allow

ZERO

in-

con-

level

sup-

the

much

break

As

the
the

output

out-

the

an

ad-

made.

the

fluc-

of

10

TYPE

4.2

SWEEP

sponse
A

cathode-ray
means
when

Sweep

phone-tip
to

provide a zero-reference

and

for
should
sweep

put

rectifier

connector

response.
power
turn

the
sired
and

vertical
imately
ative

acteristic,

that

the

by a vertical

the

indication
value
the

oscillator

ratio

of

The

use

rectifier

straight
duce
this

line

the

output
cillator
OUTPUT

1263-B

APPLICATIONS.

If

the

oscilfator

displays,

of

checking

optimum

Drive

is

jacks

the

checking

be

supplied

drive.

and

thus

Such

supply

level.

voltage

With

of

If

sweep

off,

selector

Adjust

deflection.

rectangular,

and

1-kc

horizontal

line.

the

modulated

the

square

of a matched

will

minimize

the

oscillator

line,

adjust

indicates

coupling.

output

VOLT

the

oscilloscope

output-coupling

used,

on

Temporarily

connect

made

changes

provided

switch

horizontal

the

positive

internal

portions

of

flatness

over

its

wave

speed. A broadening

coupling

AGE

AMPLITUDE-REGULATING

is

mechanically

dynamic

the

connect

the

Type

display.

with

available.

oscilloscope

with

The

output

frequency

termination

variation

output

the

control-system

For

control,

regulation

used

operation

setting
the

1263-B

base

The

the

oscilloscope

insert a Type

the

vertical

in

connection

that

the

to

OPERATE.

For

cw

the

horizontal

portion

portion

modulation a similar

are

traced

flatness

of

the

is

and

consequently

of

characteristic

oscillator

best

regulation,

is

necessary

particularly

swept

of

the

to

present

of

the

blanking

Amplitude-Regulating

line

horizontal

The

selector

sensitivity

operation,

represents

the

of

the

oscillator

regulated,

range

or

resistance

oscillator

output

or

oscillation;

the

power

is

obtained.

cable

for

the

sweep

874-T

input

oscilloscope

can

be

switch

Drive

to

the

portions

zero

level.

out

by

path

variation

will

cause

show a variation

is

coupling,

burst

of

some

with

changes

with

POWER

for

automatic

output

desired

input

of

made

the

give a suitable

pattern

the

pattern

two
traced
output.

starting

not

high-frequency

to

internal

should

response

supply

voltage

the

straight

pad

readjustment

and

When

the

to

the

BLANKING

response

to

in

the

cable

oscilloscope

should

without

is

set

oscillator

should

oscillator

is

bright

by

the

Since

in

starting

variations

following

delay.

shown

and,

if

eliminate

in

the
1-kc

the

obtained

spots

SUPPLY

frequency

be

is

an
of

Type

Power

oscilloscope

provided

to

be

set

turning

to

ZERO.
over

horizontal

be

lines.

output

connected

lower

the

in

from

the

as a horizontal

necessary,

voltage

this,

of

setting

modulation.

re-

checked.

excellent

observing

1750-A

tele-

Supply

display

by

the

the

out-

to

the

for

the

Re-

the

de-

approx-

The

neg-

char-

except

spot

average

delay

the

duty

flatness.

output

re·

reduce

the

os-

of

the

de

is

in

on

Sharp

particularly

in

sweep

plete

speed

correction

discontinuities

when

wide

frequency

so

that

the

of

output

in

the

output

ranges

control-system

voltage.

With

11

characteristic

are

swept,

response

General

of

the

may

require a reduction

time

will

permit

Radio

Unit

Oscillators

oscillator,

com-

GENERAL RADIO COMPANY

and

cw

operation

posed

by

Once a flat

age

characteristic

transferred

voltage

is

mechanical

being

to

this

horizontal

is

the

device

regulated

reduction

standards.

line

obtained,

under

by

will

representing

the

test

the

Type

not

exceed

oscilloscope

with

the

1263-B.

4.3 INTERNAL AMPLITUDE MODULATION.

In

addition

MOD,

there

quency

adjust

FREQ
modulated
INCREASE

Type
modulator
put

selective

the

control.

1263-B.

with a standard

modulating

or for

to

the

are

two

controls

audio

For a symmetrical

output

DUTY

If

other

on

an

RATIO

a

gate

telephone

toggle

frequency

synchronizing

switch

for

internal

amplifier

for maximum

oscilloscope

thumb-set

voltage

is

plug.

that

selects

modulation.

is

used

with a demodulating

modulation.

and

adjust

control

desired

purposes,

for

4.4 EXTERNAL AMPLITUDE MODULATION.

Although

designed

ulated

be

cw.

(red)

volt

capacitor

itor

BLANKING

nonlinearity

pedance.

the

of

rather a curve

quency

curve.

any

the

output

applied

Connect a blocking
BLANKING

output,

is

an

required

Figure 5 shows

frequency.

1263-B.

response

To

frequency,

output-voltage

just

below

the

Type

to

operate

to

the

is

suitable

electrolytic,

terminal.

Therefore,

attenua~ion

Owing

determine

the

oscillators

only, a limited

the

BLANKING

terminal,

input

impedance

at

At

causes

greater

it

This

is

representing

to

the

is

flat

the

slowly

meter

point

where

1263-B

amount

terminals

capacitor

and

frequencies

connect

outputs

modulation

is

recommended

be

added

the

limit

not a curve

the

large

amount

below
maximum

increase

on

the

the

Amplitude-Regulating

with

cw

or

internal1-kc

of

amplitude-modulating

when

in

series

set

the

output

is

about

5000

above

20

its

negative

smaller

at

of

the

response-speed

the

the

Type

meter

than 1 volt,

nonlinearity

that

the

output

resulting

of

over-all

of

feedback

overload

voltage

modulating

1263-B.

starts

that

the

low-speed

the

oscillator

vertical

assurance

either

If

response

waveform,

on

keying a synchronous
connect

the

with

voltage

ohms,

cps.

terminal

if

lower

points

Set

to

with

the

duty

the

left-hand

Power

Type

the

and a 20-pJ

If

the

the
and

outputs

of

the

Type

modulation

frequency

limitation
in

the

represented

can

safely

voltage

the

modulation

drop,

since

output-volt-

input

that

CW

or

a

1-kc

the

monitor

ratio

side

to

the

GATE

Supply

square-wave

voltage

1263-B

lead

to

to 1 volt.

blocking

to

the

voltmeter

lower

are
874-VR.
as a function

response,

of

system,

be

while

this

limit

can

the

output

1-KC nJ

fixed-fre-

detector,

ADJ

MOD

the

de-

with

the

of

the
de-

out-

was

mod-

may

is

set

the

high

At

a 1-

blocking

capac-

high

(red)

diode

input

desired,

the

Type

the

fre-

by

applied

observing

voltage
voltage

im-

be

for

im-

but

the

at

12

TYPE

1263-B

AMPLITUDE-REGULATING

POWER

SUPPLY

RELATIVE
AMPLITUDE
MODULATION

0

db=

100%

A.M.

-10

-20

-30

Figure 5.

produces
the

output

lead

to

1

volt.

a 20-

f.1

the

blocking

to

the

the

voltmeter

and

lower
outputs
the

Type

If

limit

the

may

more

NOTES:

~

CURVE REPRESENTS OVERLOAD
LIMITATION,
CHARACTERISTIC OF RESPONSE.

RESPONSE

~

~~2~LCI~~~s

FOR

I

VOLT

VOLTAGES ARE PROPORTIONALLY SMALLER.

~

I

EXCEEDED

OTHiR

10

the

regulation.

the

high

At a

f

blocking

high

(red)

input

are

desired,

NOT

FREQUENCY

IS

FLAT

FOR

All

v~~::EES~N;~~S

R-F OUTPUT LEVELS

THE LIMITING MODULATION

VOLT

R-F

OUTPUT

SHOULD

UNDER MODULATION

LliiTAIIOis

Typical

maximum

ii!Lr

1

MODULATING FREQUENCY IN CYCLES PER SECOND

external

modulation

Connect a blocking

(red)

BLANKING

1-volt

output,

capacitor

capacitor

is

BLANKING

diode

nonlinearity

impedance.

the

required

874-VR.

necessary,

voltage

easily

equip
available
be

set

to

the

1-.

.;;;;;;::::

~AM

BY

CURVE.

THAN

LESS

NOT

BE

OR

iPPEAR.

1 I

100

amplitude-modulation

of

the

the

input

is

suitable

an

electrolytic,

terminal.

causes

Therefore,

modulating

to

about 1 volt,

the

required

I

I'.

~--~--

Type

1263-B

that

can

terminal,

impedance

at

At

greater

it

attenuation

source

so

value.

IMPEDANCE
TERMINALS •
AT

I VOLT

R-F

{DIRECTLY

PROPORTIONAL

ITI

~

LEVELl

30%A.M.

~%A.M.

1000

be

obtained

capacitor

and

set

is

about
frequencies
connect

its

outputs

modulation

is

recommended

be

added

with a voltage

that

the

AT BLANKING

5000

ohms

LEVEL

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

!--

characteristics

without

in

series

the

output

5000

above

negative

smaller

than 1 volt,
nonlinearity

that

at

the

modulating

MAXIMUM

p

ERMIS SIBLE
MODULATING
VOLTAGE

O.Bv

0.4v

0.2v

O.lv

0.051/

0.02511

ACROSS
BLANKING
TERMINAL

WITH I

R-F

10,000

spoiling

with
voltage
ohms,

20

cps.

terminal

if

output

divider

voltage

VOLT

LEVEL

the

to

and

If

lower

of

to

13

GENERAL

RADIO

Section 5

COMPANY

OUTPUT

5.1

GENERAL.

The

ability

to

maintain a constant
acteristics
close
lator
errors.

5.2

OSCILLATOR

detector
frequency
peak
to

it.

on

the

the

phase
fundamental,
even

quency

frequency
magnified.

oscillator
monics.
limited
cutoff
tively
and

1000 Me,
To

cover

off

frequencies
below
a

problem.

the

output

square

of

limits

harmonics

The

value

The

if

Unfortunately,

Above

frequency.

between

300

Another

the

Type

at

the

range.

of

amount

percentage

of

the

the

the

amount

oscillators.

of

the

about

output

The

to

somewhat

and

the

gaps

Me,

rectifier

law.

of

the

the

output

rectified

and

frequency

HARMONICS.

874-VR

high

rf

This

the

rf

waveform

that

of

harmonic

variation

of

harmonic

this

If

voltmeter

300

and

the

frequency

more

Thus,

300

and

the

2000-Mc

between

are

necessary.

but

in

the

way

of

at a very

The

minimum

RECTIFIER

Type

1263-B

oscillator

rectifier.

de

produced

characteristics

Voltmeter

voltages,

means

the

harmonic

condition

the

Me, a

voltmeter

range

the

500 Me,

500-to-600

minimizing

as

that

and

radio-frequency

voltage

changes

can

be

does

harmonic

rectifier

low-pass

over

than

one-half

500-Mc

the

low-pass

these

Usually

low

level

reliable

ERRORS

Amplitude-Regulating

output

The

by

Rectifier
do

most

the

can

produce a de

with

twice

not

often

frequency

(refer

filter

rectifier

which

low-pass

1000-Mc

filter

ranges,

Me

range,

the

effect

where

control

necessarily

power

supply

the

output

of

operates

rf

rectifiers

rectifier

fundamental

in

the

waveform.

frequency

the

amplitude

change.

exists

approaches

to

paragraph

should

to

reduce

such a filter

the

cutoff

filter

low-pass

between

other

filters

there

is

harmonics

of

harmonics

the

characteristics

level

depends

rectifier,

the

rectifier

almost

can

recognize

output

can

with

in

wide-range

5. 3),

be

used

errors

frequency

can

filter

1200

with

no

need

is

approximately

Power

maintains

covering a wide

"In
respect

of

the

is

be

and

to

usually

is

Supply

on

the

char-

within

but

oscil-

can

cause

as a peak

only

proportional

vary

depends

addition,

to

harmonic,

high-fre-

the

resonant

the

error

between

due

to

effective

up

to

used

effec-

between

2000 Me.

suitable

do

anything

become

to

operate

approach

har-

600

cut-

the

if

the

is

the

is

the

0.2

14

TYPE

volt

for

the

though

the

fect

this

diode

of

harmonics

limit.

When

vice

under

ative

peak
monics
of
altered
true
test
monics
picture
nonmatching
detector,
used

can

the

oscillator

in

elimination

is

being

by

of

in

the

Type

1263-B

Type

is

above

used

in

the

test

is

rectifier),

take

passing

measured

such

the

transmission

diode

874-VQ,

Type

AMPLITUDE-REGULATING

1263-B

the

can

polarity

the

place.

with

through

of

the

an

arrangement),

polarities.

874-VR.

Amplitude-Regulating

the

region

Type

be

of

same

some

This

respect

effects

for

is

usually

874-VR,

obtained

the

response

as

that

of

apparent

is

true

to

the

the

device

of

the

transmission

characteristics

For

supplied

quite

at

the

fundamental

the

this

with a diode

considered

noticeable

output

where

harmonics

levels

detector

diode

in

cancellation

the

under

test.

of

both

resulting

than

reason,

the

POWER

Power

to

be

reduction

approaching

at

the

output

the

output

of

the

phase

has

of

not

been

While

(since

display

the

fundamental

could

be

recommended

of

the

SUPPLY

Supply,

square

in

of

rectifier
effect
the

harmonics

appreciably

this

device

and

is

often a truer

obtained

same

type

and

al-

law

for

the

ef-

this

low

the

de-

(neg-

of

har-

is

not

under

har-

with

matched

as

is

a

5.3 RECTIFIER

The

resonant

about

5400

Me.
regulated
Figure 6 illustrates

Voltmeter
crystal
response
response,

<ll!J

!J

0>

> 0

.J

~~

~ ~

~0

Figure

U)

0

1&.1

~

1.0

.9

. 8

·1

.6

·5

6.

level

Rectifier

diode.

detector,

since

RESONANT

r--

0

Resonance

about 3 percent

When

the

FREQUENCY

frequency

The

actual

the

frequency

or

Type

the

Type

there

is

errors

in

FREQUENCY

correction

CHARACTERISTICS.

of

the

Type

874-VR

output

no

voltage

at

1000

characteristics

874-VQ

874-VQ

need

to

the

Types

-

----

540C

FREQUENCY-

factors;

,is down from

Me

Voltmeter

Voltmeter

apply a correction

874-VR

i

----

Me.

Type

and

and

--

kMc

874-

Voltmeter

13

percent

of

the

Detector

Detector

874-VQ

...........

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

2

VR

Voltmeter

Rectifier

the

indicated

at

2000 Me.

Type

874-VR

with a typical

is

used

as

for

frequency

cancel.

r-

....

-

...

Rectifier.

is
or

the

3

15

5..4

RECTIFIER

In

it

is

important

ably

high.
paragraph
such

abuse.

this

defect
should
resistance
odes
874-VQ

be

are

order

to

that

Diodes

3.1.1),
Since

unless

made

is

less

used

in

Voltmeter

GENERAL

DIODE

prevent

frequently.

both

excessive

the

reverse

are

easily

and

the

the

normal

it

is

severe,

than

40

the

Detector.

RADIO

RESISTANCE.

rf

distortion

resistance

damaged

reverse

For

kilohms

Type

resistance

calibration

ohmmeter

best

performance,

should

874-VR

COMPANY

from

of

the

by

excessive

is

procedure

checks

be

replaced.

Voltmeter

the

diode

used

voltage

usually

does

of

reverse

diodes

Type

Rectifier

output

be

(refer

decreased

not

resistance

whose

and

rectifier,

reason-

to

show

reverse

1N23B

the

Type

by
up

di-

SERVICE

6.1

GENERAL.

The

two-year
attests
difficulties
sible.

service
full
to

write

er),
proper
warranty, a purchase
lay.

the

quality

do

occur,

In

case

of

difficulties

instructions,

information

mention

Before

to

our

requesting a Returned

handling

of

the

serial

returning

Service

and

Section 6

AND

warranty

of

materials
our

please

the

and

Department

identification.

order

service

that

write

trouble

type

an

instrument

Material

should

given

and

cannot

and

numbers

or

MAINTENANCE

with

every

General

workmanship

engineers

be

or

phone

of

steps

of

to.

General

nearest

Tag.

For

instruments

be

forwarded

16

eliminated

our

the

District

in our

will

assist

Service

taken

to

instrument.

Radio

Office

Use

of

to

avoid

by

Department,

remedy

for

this

not

Radio

instrument
products.
in

any

way

the

use

of

it.

Be

service,

(see

back

tag

will

covered

unnecessary

When

pos-

these

giving

sure

please

cov-

ensure

by

the

de-

TYPE

6.2

TUBE

Tube

may

be

the

specifications,

to

deliver
although
poor

performance

ure or

or

V3 ,
cw

from

OUTPUT

the

top

age

from
volts
volts.
least
margin
terchange
turn

R2

is

greater

V6.

cessive
as

follows:
a.
b.

and

0.2
c.
d.
e.

V1

can

f. With

as

described

1263-B

REPLACEMENT.

Refer

to

the

requirements

required.

rated

output

failure

poor

V5

the

of

with a 20,000-ohm-per-volt

Turn

-45
of

to

The

de

Set

Adjust

volt.
Vary
The

Readjust

now

of

of

performance

is

replaced,

power

VOLTAGE

the

instrument,

TP 1 (pin 5 or

R3

clockwise

volts

before

cutoff

V1

than

usual
drift

the

bias

and

its

counterclockwise

- 45

defect

with

selector

the

ZERO

the

line

total

shift

for

be

checked

an

oscillator

in

Section

AMPLITUDE-REGULATING

tube-location

are

not

If

the

instrument

one

or more

current

V1, V3, V4,

the

voltmeter
of

check

supply

control.

is

V6)

decreasing

voltage).

V3

and,

volts

found

changes

switch

control

voltage

in

indication

zero

indication.

for

connected

4,

chart

particularly

tubes

is

usually

or

V5 may

is

modulation

that

the

is

zero

If

it

is

fully

counterclockwise

to

GND.

meter

slowly

if

and

from

set

and

If

the

necessary,

limit.

the

oscillator

in

replacement

in

line

to

ZERO.

to

obtain a meter

105

should

drift

as

the

output

(Figure

critical

fails

may

due

usually

is

usually

output

at

the

not,

This

and a line

note

rapidly

above

replace

If

voltage.

to

125

follows:

and

adjusted

to

also

counterclockwise

check

the

be

voltage

POWER

7)

inside

although

perform

require

voltage

replacement.

to a defective

be

indicated.

due

to a defective
due

of

an

oscillator

that

R2,

and

must

voltage

that

the

to

zero

and

test

is

one

voltage

output

tubes

First,

(or

less

is

for V1

V2

indication

210

to

than

for
to

0.5

SUPPLY

the

some

in

accordance

to

V4 or

accessible

measure

be

of

voltage

beyond

not

satisfactory,

or

both

from

not

and

should

250)

one

scale

proper

volt.

dust

selection

V6

(6V6GT),

Failure

V2.

\'5.
operated
limit

the

at

least

125

(or

remains

tubes.

TP 1 to

zero,

V2

be

checked

between

volts.

division.

cw

operation

cover.

with

Failure

or

Fail-

If

V1,

on

of

the

from

volt-

- 45

250)
at

(checks

in-

Re-

GND

replace

is

ex-

0.1

Figure

of

the

7.

Tube

instrument)

Location

Amplitude-Regulating

17

Chart (rear

for

Type

Power

view
1263-B
Supply.

g.

Vary

the

line

h.

The

total

shift

division.

showing

are

not

Completely

drifts

extreme.

satisfactory

greater

6.3 CALIBRATION.

In

addition

preceding

factory-set,
strument)
ment
these,

R14
the
tube

and

of

RX1,

set

so

that

same

as

voltmeter

The

strument.

its

counterclockwise

scribed

in

sections,

the

other

No

paragraph

to

sealed

will

Rl3,

panel

the

ac

that

indicated

should

internal

adjustment

GENERAL

voltage

in

meter

than

the

normal

there

are

control

not

require

R14,

R15,

selector

potential

be

used.

control

of

limit

6.2.

RADIO

from

indication

performance

defined

two

(R14,

adjustment

R27,

switch

at

the

on

the

is

this

and

is

COMPANY

105

to

above

operating

internal

accessible

or

R75.

to

OUTPUT

panel

R2,

accessible

control

provided

125

(or

210

should

can

if

the

adjustments

controls.

from

except

After

the

CHECK

RECTIFIER

voltmeter.

is

necessary

only

to

250)

be

less

be

obtained

line-voltage

described

One

the

bottom

with

failure

replacement

position

An

accurate

from

the

since

for

making

volts.

than

one

with

variations

of

these

of

and

and

connector

top

it

the

scale

tubes

in

the

replace-

of

any

adjust

vacuum-

of

the

is

set

test

is

the

a

in-

of

is

in-

at

de-

6.4 TABLE

Tube

V1

(12AX7)

V2

(12AX7) 2

V3

(12AX7)

1 +188 v
2

3
4,
6 +200 v
7
8

1 +325 v

3
4,5-9
6
7

8

1
2

3
4,
6
7
8

Pin

5-9

5-9

OF

VOLTAGES

De

Volts

to

Ground

-.02

v

+2.05 v

6.7

v

ae

-.02

v

+2.05 v 300 k

0

+3.0

v 160 k 3

6.7

v

0

+3.0

6.7

ac

v

v

ac

+325 v

+350 v
+lOOv
+102 v

+130
+101v
+102v

AND

RESISTANCES.

Res. to

Ground

520 k

1.1k

300 k 3

320 k
100 k 7

51

k

3.4

51

k

3.3 M

160 k

1 k
1M

100 k

k

430
920k
100 k

M

Tube

V4 1

(5963)

V5

(12AX7)

V6

(6V6GT)

V7

(OA2)

18

Pin

2

4,5-9
6 +88 v

8

1

2

4,

5-9
6
7
8

2-7
3 0
4
5
8

2, 7

De

to

Ground

+65 v

-43
0

6.

-50
0

+uov

-58

0

6.7

+350 v

-59
0

6.7

+180 v

-55
0

-150

Volts

v

7 v

v

v

v

v

v

v

v

ac

ac

ac

Res. to

Ground

220 k

780

0

220 k
780 k

0

430 k
900

0

1 k
!.25M

200

k

Open

6k

200 k

0

6.2

k

k

k

1.

M D

input

2.

23

connected

3.

control

MOD

nJ

CREASE

TYPE (50

CABLE
CABLE,

LOCKING
PANEL,

FLANGED

PANEL,

LOCKING

PANEL,

LOCKING,
RECESSED

BASIC

(AIR-LINE)

BASIC

LOCKING

TO

TYPE

BNC

plug
plug
jack

plug

c

plug
jack

HN

plug
jack

LC

plug
jack

LT

plug

jack

N

plug
plug

jack
plug

sc

plug

jack

TYPE

De

1263-B AMPLITUDE-REGULATING

voltages

resistance.

Resistance

to

Except

switch

MOD

and

for V4,

R2

set

switch

DUTY

TYPE

874·

874-A3,
RG-29/U,

874-A2

-55/U,

!l)

-58/U,

·CA

-CLA

-PBA -PB58A

-PLA

-PRLA

-C58A

-CL58A

-PL58A

·PRL58A

50

!l

CONNECTOR-

CONNECTOR-

TYPE

874-

874­QBJA

QBJV
QBPA

QCJA
QCJL*
QCP

QHJA
QHPA

QLTJ
QLPA

QLTJ
QLTP

QNJA
QNJL*
QNP

QSCJ
QSCJL*
QSCP

are

measured

measurements

ground.

measurements

set

completely

on

CW.

Measurements

set

on 1

RATIO

CONNECTORS

FOR CABLE TYPE

ADAPTORS

UHF

(air

double
blndlDg
27 4

•

Locking

Example:
to a Type N jack,
874-QNP.

controls

TABLE

Rg-8/U,

-9/U,

-116/U,

etc.

etc.

-C8A

-CL8A

-PB8A

-PL8A

-PRL8A -PRL62A

874-B

874-BL

TO

TYPE

TNC

UHF

(cable)

7/8in.

line)

1-5/8
3-1/8

plug

or

post

pair

-NO

patch

Type

To

with a vacuum-tube

are

made

are

counterclockwise

KC

fU

MOD

set

at

OF

TYPE

874 COMPONENTS

RG-59/U,

-62/U,

-116/U,

etc.

-C62A

-CL62A

·PB62A F2000

-PL62A

874-

plug

QTNJ

plug

QTNJV

jack
plug

QUJ

plug

QUJL*

jack

QUP
QUIA

in.

QU2

ln.

QU3A

jack

Q2

(f}

cord

QN6

87 4

Connector.

connect

Type

order

QTNP

Type

87 4

single-

wire

lead

·PLT

-PRLT

with

anchor

made

with

and

for

V4

are

made

and

the

AD]

maximum

clockwise

OTiiER

874-

A2
A3
BM
020,

050
EL
Fl85

F500

FlOOO
F4000

G3,G6
GlO, G20 attenuators
GA
JR
K
LlO, L20,

L30

LA

LKlO, LK20
LR
LT
M

MB

MR

T

VB

vc

Vl

VQ
VR
W50
WlOO
W200 200
WM
WN,

WN3

WO,

W03
X
XL

y

z

The

above

plete

details,

catalng.

POWER

SUPPLY

voltmeter

terminals

OUTPUT

the

MOD

VOLTAGE

CW-1 KC

with

the

FREQ

position.

COAXIAL ELEMENTS

50

!l

cable,

50

!l

cable,

300

!l

bal.

20-,

50-cm

90'

ell
185-Mc
500-Mc
1000-Mc

Me

2000­{000-Mc

3-,

6-,

adjustable attenuator

rotary

joint

coupling capacitor

{

10-,

20-,

air

lines

33-58

em
constant Z adjustable
radiating

trombone constant Z line

component mount

coupling

mixer-recd..fier

tee
balun
variable
voltmeter

voltmeter

voltmeter

!l

termination

50
100

!l

termination

!l

termination
50

!l

termination

short-circuit

open-circuit

insertion

series

inductor

clip

lock

stand

is a partial

refer

to

listing.

the

with

21

CW-1

and

0.365"

0.206"

termination

adjustable

low-pass
low-pass

low-pass

low-pass

low-pass

10-,

20-db

30-cm

adjustable

line

probe

capacitor

indicator

detector

rectifier

terminations

terminations

unit

General

100-

and

f1J

kc

IN-

00
00

filter
filter

filter
filter
filter

rigid

line

For com-

Radio

stubs

lines

19

GENERAL

RADIO

COMPANY

Rl

360k
250k

R2

360k

R3
R4

lk

R5

lk

R6

300k

R7

470k

R8

lOk

R9

1M
1M

RIO
Rll

1M

Rl2

lOOk
R13 4.7
Rl4

10 ±10%

Rl5

47

R16

3.3M
lk

R17
R18 lOOk
Rl9

470k

4.7k

R20

25k

R21

R22

300k
R23

300k
lOOk

R24
R25

lk

R26

3.3M

R27 22

100

R28

1M

R29

2.74M

R30

1M

R31
R32

2.74M

R33

5.6k

R34

lk

R35 lOOk

56k

R36
R37

160k
R38

160k
R39 706k
R40 lOOk
R41 lOOk
R42 796k
R43

470k

lk

R44
R45

15k

R46

6.2k

R47

lk

R48

2.2M

2.2M

R49

200k

R50
R51
R52

lk

3.9k

RESISTO!U

±

5%

±10%

±

5%

±

5%

±

5%

±

5%

±

5%
±10%
±

5%
±

5%
±

5%
±

5%
±10%

±10%
±

5%
±

5%
±

5%
±

5%
±

5%
±10%
±

5%
±

5%
±10%
±

5%
±

5%
±

5%

±

5%

±

1%
±

1%
±

1%
±

1%

±

5%

±

5%
±

5%
±

5%
±

5%
±

5%
±1/2%

±10%

±10%

±1/2%

±

5%

±

5%
±

5%
±

5%
±

5%
±

5%

±

5%

±

5%

±

5%
±

5%

1/2
1/2

1/2
1/2
1/2
1/2

1/2

lw
1/2
1/2
lw

lw
1/2
1/2
1/2
1/2
1/2

1/2
1/2

1/2
1/2
1/2
1/2
1/8
1/2
1/8

1/2

1/2

1/2

1/2
1/2
1/2
1/2
1/8

1/8
1/2
1/2

l/2w
l/2w

l/2w
1/2
1/2
1/2

1/2

2w

PARTS

REC-20BF(364B) R53

w

POSC-11(254C)
REC-

w
w
w
w
w

w
w

w

w
w
w
w
w

w

w
w

w
w
w
w
w
w
w
w
w
w
w
w
w
w

w
w
w

w
w
w
w

20BF( 364B) R55
REC-20BF(l02B)
REC-20BF(l02B)
REC-20BF(304B)
REC-20BF(474B)

POSC-25(103C)

REC-

20BF(822B)
REC-30BF(l05B)
REC-20BF(105B)
REC-20BF(104B)
REC-30BF(047C)

POSW-3(100C)

REC-30BF(470C)
REC-20BF(335B)
REC-20BF(l02B)

REC-20BF(l04B)

REC-20BF(474B)
REC-20BF(472B) R72
POSC

-11 (253C) R73

REC-

20BFP04B)
REC-20BF

POSC-11(104C) R76

REC-20BF(102B)
REC-20BF(335B)
REC-20BF(220B)
REC-20BF(101B)
REF-60(105A)
REF-70(2744A)
REF-60(105A)

REF-70(2744A)
REC-20BF(562B)

REC-20BF(102B)

REC-20BF(104B)
REC-20BF(563B)

REC-20BF(164B)

REC-20BF(164B)

REF

POSC-11(104C)
POSC-25(104C)
REF-60(7963A)
REC-20BF(474B)
REC-20BF(102B)
REC-20BF(l53B)
REC-20BF(622B)
REC­REC-20BF(225B)
REC­REC-20BF(204B)

REC-

REC-41BF(392B) C16C

304B)

-60(7063A)

20BF(l02B)

20BF(225B)

20BF(l02B)

LIST

R54

360k
R56
R57
R58

270
R59
R60
R61
R62
R63
R64
R65
R66
R67
R68

R70 270
R71 270

270

120k
R74
R75

Cl
C2
C3
C4
C5
C6
C7
C8
C9
ClO
CllA
CllB

cue

C12A
Cl2B
C13A
Cl3B
C14A
Cl4B
Cl4C
Cl5A
C15B
Cl5C
Cl6A
Cl6B

RESISTORS

3.9k

±

fll

5%
±
±

5%
±
±
±10%
.!:10%
±10%
±10%
±10%
±
±10%
±10%
±10%
±
±

±10%
±10%
±10%
±10%
±10%
±
±

±
±10%
±10%
±10%
±10%

}

J

3.9k

lOOk

12k

1.5k

1.5k

1.5k
1M

lOOk

3.3k

3.3k

3.3k

4.7

75

6.8

91k

lOk

lOfli
.Olf!f ±10%
.Olf!f ±10%
.0068f!f ±10%
.OOlf!f ±
.OOlf!f
.lf!f

1.0

0.22f!f
O.lf!f

50f!f}
25f!f

25f!f
lOf!f}

lOf!f
lOfli}

lOf!f

1500f!f J

750fli
750 fll
90f!f
30f!f
30f!f
90fli
30f!f
30fli

(Contl

2w
2w

5%

1/2
5%
5%

5%

5%
5%

5%
5%

CAPACITORS

1%
1%

w REC-20BF(364B)

1/2

w

10

w
2w
2w
2w
2w
lw
1/2

w
2w
2w
2w
3w
2w

2w
2w
2w
2w
1/2

w REW -3C(068C)
1/2

w
l/2w

25dcwv

600dcwv
450dcwv

450dcwv
450dcwv

lOdcwv

300dcwv

300dcwv

REC-41BF(392B)
REC-41BF(392B)

REC-20BF(104B)
REP0-22(1238)
REC-41BF(271C)
REC-41BF(l52C)
REC-41BF(l52C)
REC-41BF(152C)
REC-30BF(105C)
REC-20BF(l04B)
REC-41BF(332C)
REC-41BF(332C)
REC-41BF(332C)
REP0-45(047B)
REC-41BF(750B)

REC-41BF(271C)
REC-41BF(271C)
REC-41BF(271C)
REC-41BF(l24C)

REC-20BF(913B)
REC-20BF(l03B)

COE-56
COL-71(103C)
COL-71(103C)
COM-1B(682C)

COM-5F(lO:CA)
COM-5F(102A)
COW-25(104C)
COW-17(105C)
COW-17(224C)
COL-71(104C)

COE-10

COE-5
COE-5

COE-9

COE-52

COE-52

20

C17A
C17B
Cl7C
Cl8
Cl9
C20
C21
C22 .047tJf

RXl

2RE0-1008

RX2

2RE-1002

RX3

2RE-1002

RX4

2RE-1002

RX5

2RE-1002

Vl
V2

V3

50fil}

251Jf
25tJf
.0047tJf
.0047tJf
10
.01

12AX7
12AX7
12AX7

fli

fli

CAPACITORS

±20%
±20%

±20%
±10%

RECTIFIERS

RX6
RX7
RX8
RX9

(Contl

450dcwv
500dcwv COC-62(4720)

500dcwv

25dcwv
500dcwv COC-62(1030)
400dcwv COW-25(473C)

2RE-1002
2RE-1002
2RE-41
2RE-41

.!.!!!ll.

V4 5963 V6 6V6GT
V5 12AX7

Resistances
or M (megohms).
cated

by

tJf

(microfarads).

Type

designations

POSC -Potentiometer,
POSW-

Potentiometer,

REG -

Resistor,

REF-

Resistor,

REPO -

Resistor,

REW-

Resistor,

COE-10

COC-62(4720)
COE-56

RXlO
RXll
RX12
RX13

V7

OA2

are

in

ohms

Capacitances

for

composition

wire-wound
composition
film

power

wir-e-wound

2RE-1002
2RE-1002
2RE-1002
2RE-1002

NOTE
except

are

resistors

L1
F1
F2
Fl
F2

Jl

J2

J3

J4

Ml
Pl

PLl
PL2
SOl
Sl

S2

S3

Tl

as

otherwise

in

picofarads

and

capacitors

COG -Capacitor,
COE ­COL ­COM· ­COW -Capacitor,

MISCELLANEOUS

FILTER
FUSE
FUSE
FUSE

FUSE
JACK ASSEMBLY
JACK
JACK
JACK
METER

PILOT LAMP

PILOT LAMP SOCKET

PLUG
PLUG

SOCKET

SWITCH

SWITCH

SWITCH
TRANSFORMER

indicated

except

are

Capacitor,
Capacitor,

Capacitor,

a

0.8
a

0.8

0.4

a

0.4

a

Mazda

by

k (kilohms)

as

otherwise

as

follows:

ceramic
electrolytic
oil

mica
wax

115vo1t
115vo1t
230vo1t
230vo1t

#44

indi-

745-414
FUF-1
FUF-1
FUF-1
FUF-1
1263-B-200
COSJ-llR
COSJ-llB
COSJ-820

MEOS-100

2LAP-939
ZSOL-981
COPP-10
COMP-1264-2
COMS-11-4
SWRW-203
SWT-333
SWT-335
365-493

F2

S2

Tl

CIS

PLI

Cl9

SEE FIGURE

II

SOl

SEE

' FIGURE

Figure 8.
View
Amplitude-Regulating
Power

of

the

S•pply.

Bottom

Type

10

Interior

1263-B

SEE

FIGURE

Figure 9.

View
Amplitude-Regulating
Power

Top Interior

of

the

Supply.

Type

1263-D

12

SEE FIGURE

10

r-------

SEE

FIGURE

II

WBOUN

Figure 10.

Etched-Board

Layout

for t

he

Type

1263-B.

(:1

I /I I

---1

o I J

Figure 11.

Etched-Board

Layout

for

the

Type

1263-B.

u

Figure 12.

Etched-Board

Layout

for

the

Type

1263-B.

GENE

A

WB

ST CONCORD

RADIO

,

MASaACHUSaTTS

CO

PANY

DISTRICT

NEW

SYRACUSE

PHILADELPHIA

WASHINGTON

FLORIDA

CHICAGO

LOS

SAN

CANADA

YORK

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Representatives in Prmcipal

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