Universal audio 1122 User manual

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I

model 1122

STEREO TRANSCRIPTION PREAMPLIFIER

products of

UNITED

RECORDING

ELECTRONICS

INDUSTRIES

8460

SAN

FERNANDO

RD.

, SUN

VALLEY,

CALIFORNIA

91352

TELEX

65

-

1389

UREI

SNVY

(213) 767-

1000

•[ill~

company

www.SteamPoweredRadio.Com

I

BEFORE

PROCEEDING

WITH

COMPLETE UNPACKING

AND

SETUP,

CONSULT UNPACKING

AND

INSPECTION INSTRUCTIONS ON

PAGE

4

model 1122

STEREO

TRANSCRIPTION PREAMPLIFIER

United Recording Electronics Industries

8460

SAN

FERNANDO

ROAD,

SUN

VALLEY,

CALIF"ORNiA

91352

(213)

767-1000

Printed

in U.S.A.

©

Copyright

1978,

UREI

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I

TABLE

OF

CONTENTS

SECTION

I.

INTRODUCTION

1.1

DESCRIPTION

1.2

TECHNICAL SPECIFICATIONS

1.3

CONTROLS

1.4

CONNECTIONS

SECTION

II.

INSPECTION

AND

INSTALLATION

2.1

UNPACKING

AND

INSPECTION

2.2

ENVIRONMENTAL

CONSIDERATIONS

2.3

POWERING

2.4

EXTERNAL

CONNECTIONS

SECTION

III.

OPERATING INSTRUCTIONS

3.1

GENERAL

3.2

FREQUENCY

RESPONSE CHARACTERISTICS

SECTION

IV.

MAINTENANCE

4.1

GENERAL

4.2

REPAIRS

AND

WARRANTY

SECTION

V.

APPENDIX

FIGURE

5.

PLOTTED

GRAPH

FIGURE

6.

SCHEMATIC

DIAGRAM

OF

URE!

MODEL

1122

PAGE

1

2

3

4

5

7

8

I

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I

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) ©

lfVl:

l

SECTION I

INTRODUCTION

model

1122

TRANSCRIPTION PREAMPLIFIER

B

PO

WtR

®

) 0 l

f\/lt

, \

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Figure

1.

Model

1122

Front

Panel

1.1

DESCRIPTION

The

1122

is

a

two-channel,

solid-state,

equalized

preamplifier/

line

amplifier

desi

g

ned

to

provide

the

highest

quality

disc

reprod-

uction

for

broadcast

and

recording

applications.

While

primarily

intended

for

stereo

use,

it

may

be

utilized

very

effectivedly

for

two

separate

monophonic

channels.

Any

magnetic

pickup

designed

for

operation

with

a

47,000

ohm

termination

may

be

used

with

the

Model

1122,

and

its

wide

dynamic

range

provides

faithful

reproduction

from

low

level

classical

recordings

or

maximum

excursion

single

records.

Outputs

are

balanced

for

600-ohm

or

150-ohm

lines

(approximately

80

ohms

actual).

Installation

is

simple,

and

with

standard

grounding

practices

the

1122

is

exceptionally

immune

to

rf

interference.

High

frequ

e

ncy

and

low

frequency

trimmers

are

provided

for

each

channel,

to

allow

balancing

the

response

of

a

stereo

cartridge

or of

two

monophonic

cartridges

.

-1-

I

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I

1.2

TECHNICAL

SPECIFICTIO

t S

ELECTRICAL

PHYSICAL

FREQUENCY

R

ES

PONSE: RIAA/NAB

disc

playback

character-

istic

within

±1

dB

from

30

Hz

to

15

kHz;

(NAB

1964

Disc

Standard,

recommended

low

frequency

roll-off

6

dB/octave,

3 dB

down

at

20

Hz).

INPUT IMPE

DA

NCE:

47,000

ohms.

GAIN:

DISTORTION:

HUH

AND

NOISE:

OUTPUT:

OUTPUT

IMPEDANCE:

CHANNEL

SEPARATION:

ENVIRONMENT:

PO

WE

R REQUIREMENTS:

D

IM

E

NS

ION

S:

FI

NISH :

-2-

54

dB,

continuously

variable.

Less

than

0.5%

THD

at

+20

dBm,

from

30

Hz

to

20

kHz.

At

least

60

dB

below

+6

dBm

output,

(gain

set

for

+6

dBm

output

,

with

5

rnV

input,

32

Hz

to

18

kHz

band-

pass

filter).

Floating,

transformer

isolated

.

For

600

or

150

ohm

balanced

line

(aproximately

80

ohm

actual)

.

50

dB

minimum

at

10

kHz,

50

dB

minimum

at

l kHz ,

42

dB

minimum

at

100

Hz

.

Operating

within

0.5

dB

of

all

speci

f

ications

from

-5°C

to

+55°C

(23°F

to

131°F).

100

-

125

VAC

or

2

00

-

250

VAC,strappable,

50/60

Hz,

less

than

10

W.

195

x

95.3

mm

rack

panel;

depth

be

hind

p

anel

232

mm;

(7-11/16

X

3-3/4

X

9-1/8").

Pa ne l

is

3.18

mm

(1/8")

brushed

bl

ack

anodized

aluminum.

Chassis

is

cadmium

plated

steel.

I

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I

WEIGHT:

SHIPPING

~,EIGHT:

1.3

CONTROLS

CHANNEL

LEVEL:

RESPONSE

TRI

M

MERS

:

1.4

CONNECTIONS

INPUT:

OUTPUT:

2.67

kg

(5

lb.,

14

oz.).

3.

18

kg (7 1

b.

) .

Located

on

the

front

panel

and

marked

"A

Level"

and

"B

Level".

Used

to

adjust

the

overall

opera-

ting

level

and

to

balance

the

individual

levels

of

the

two

channels.

Located

inside

the

unit

on

the

PC-

board.

Used

to

balance

the

re-

sponse

of

the

two

channels

of

a

stereo

cartridge,

or

of

two

mono-

phonic

cartridges.

High

and

low

frequency

response

trimmers

are

provided

for

each

channel.

R

CA-type

jacks

on

the

rear

panel

.

Barrier

strip

terminal

on

the

rear

panel

.

(See

installation

instruc-

tions,

Section

II,

Figures

2 &

3.)

-3-

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I

SECTION

II

INSPECTION

AND

INSTALLATION

2.1

UNPACKING

AND

INSPECTION

The

Model

1122

was

carefully

packed

at

the

factory,

and

the

container

was

designed

to

protect

the

unit

from

rough

handling.

Nevertheless,

we

recommend

careful

examination

of

the

shipping

carton

and

its

contents

for

any

sign

of

physical

damage

which

could

have

occurred

in

transit.

If

damage

is

evident,

do

not

destroy

any

of

the

packing

mater-

ial

or

the

carton,

and

immediately

notify

the

carrier

of

a

possible

claim

for

damage.

Shipping

claims

must

be

made

by

the

consignee.

The

shipment

should

include:

Model

1122

Stereo

Transcription

Preamplifier

UREI

Instruction

t

anual

Two-part

Warranty

Card

bearing

the

same

serial

number

as

the

Model

1122.

2.2

ENVIRONMENTAL

CONSIDERATIONS

The

system

will

operate

satisfactorily

over

a

range

of

ambient

temperatures

from

-5°C

to

+55°C

(+23°F

to

131°F),

and

up

to

80%

relative

humidity.

If

the

system

is

installed

in

an

equipment

rack

together

with

high

heat

producing

equipment

(such

as

power

amplifiers),

adequate

ventilation

should

be

provided

to

prolong

the

life

of

components.

Also,

while

circuitry

susceptible

to

hum

pick-up

is

sufficiently

shielded

from

moderate

electromagnetic

fields

,

installation

should

be

planned

to

avoid

mounting

the

system

immediately

adjacent

to

large

power

transformers,

motors,

etc.

2.3

POWERING

Unless

a

tag

on

the

line

cord

specifies

otherwise,

the

Model

1122

was

shipped

ready

for

operation

with

nominal

115

VAC

power

mains.

In

order

to

change

this

for

nominal

230

VAC,

(50

or

60

Hz) ,

the

strapping

on

the

power

transformer

must

be

changed.

Remove

the

jumpers

between

terminals

1

and

3,

and

also

between

terminals

2

and

4.

Instead,

add

a

jumper

from

terminal

2

to

3.

Be

sure

to

change

the

fuse

to

the

correct

value:

1/8

A

slo-blo

when

changing

to

230

V

operation,

or

1/4

A

slo-blo

for

115

V

operation.

-4-

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I

2.4

EXTERNAL

CONNECTIONS

2.4.1

INPUT

CONNECTIONS

Input

connections

are

made

to

the

1122

through

two

"RCA"

type

standard

phone

jacks

on

the

rear

chassis,

marked

"A"

and

"B".

Most

phone

pickup

arms

are

equipped

with

shielded

cables

terminating

in

plugs

which

will

directly

mate

with

the

1122

jacks.

The

Model

1122

must

be

physically

located

to

allow

direct

connection

via

these

short

cables,

as

any

attempt

to

extend

them

with

additional

cable

or

extension

cables

will

result

in

loss

of

high

frequencies

due

to

the

added

shunt

capacitance.

2.4.2

OUTPUT

CONNECTIONS

Permanent

output

signal

wires

should

be

shielded

cable,

and

connected

in

accordance

with

standard

wiring

practice,

as

indicated

on

the

rear

panel

barrier

strip.

If

the

Hodel

1122

output

is

connected

to

a

high

impedance

circuit,

we

recommended

shunting

the"

±"

and

"COM"

output

ter-

minal

s

with

620

ohm,

1/2

watt

resistors.

This

assures

optimum

loading

for

the

Model

1122.

(Illustrations

on

-5-

I

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I

Figure

2.

Figure

3.

GRD

I

Connecting

The

Model

1122

With

Balanced

Output

Circuits.

GRD

OUTPUT

Connecting

The

Model

1122

With

Unbalanced

Output

Circuits.

-6-

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I

SECTION

III

OPERATING INSTRUCTIONS

3 . 1

GENERAL

After

the

Preamplifier

has

been

installed

and

is

connected

to

both

the

signal

source

and

the

succeeding

equipment

according

to

Section

II

,

power

may

be

turned

ON.

The

output

level

may

be

adjusted

individually

for

each

channel

by

the

recessed,

screwdriver

operated

controls

on

the

front

panel.

3 . 2

FREQUENCY

RESPONSE

CHARACTERISTICS

Initially

,

the

frequency

response

was

adjusted

at

the

factory

to

conform

with

standard

RIAA/NAB

characteristics.

B

oth

low

and

high

frequency

response

may

be

changed

within

an

envelope

shown

in

the

graph

,

Figure

5

(Appendix).

The

frequency

adjustments

are

·

located

on

the

printed

circuit

board

and

are

accessible

after

the

cover

has

been

removed

from

the

M

odel

1122

. (

See

Figure

4 . )

Figure

4 .

Response

Tri

mm

ers

(Top

Vi

a~

).

-7-

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I

SECTION

IV

t-iAINTENANCE

4.1

GENERAL

The ~

odel

1122

is

an

all

solid-state

unit,

ruggedly

construc-

ted

with

only

the

highest

quality

components.

As

such,

it

should

provide

years

of

trouble

free

use

with

normal

care.

All

parts

usea

are

conservatively

rated

for

their

application,

and

workmansnip

meets

the

rigid

standards

you

nave

learned

to

expect

in

ORE!

products.

NO

SPECIAL

NTIVE

t1AINTE

IJAN

CE

IS

REQiJ

IRED.

4.2

REPAIRS

AND

WARRANTY

The

rtodel

1122

is

factory

warranted

to

the

orignal

purchaser

against

defects

in

material

and

w

orkmanship

for

one

year

after

initial

purchase.

This

limited

warranty

must

be

activated

at

the

tirne

of

purchase

by

returning

the

registry

portion

of

the

Warranty

Card

to

the

factory.

Should

a

malfunction

ever

occur,

the

dealer

from

whom

the

unit

was

purchased

will

be

glad

to

handle

return

for

factory

repair;

alternately,

for

prompt

service

,

ship

the

unit

,repaid

directly

to

the

factory.

Be

sure

it

is

well

packed

in

a

sturdy

carton,

with

shock-absorbing

material

such

as

foam

rubber,

styrofoam

9ellets

or

"bubble-pack"

completely

fillin9

the

remaining

space.

Particular

attention

should

be

paid

to

protecting

the

protruding

parts.

Include

a

note

describing

the

malfunction

,

and

instructions

for

return.

We

will

pay

one-way

return

shipping

costs

on

any

in-warranty

repair.

Because

of

specially

selected

components

in

this

product

,

field

repairs

are

not

authorized

during

the

warranty

period,

and

attempts

to

perform

repairs

may

invalidate

the

warranty.

-8-

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I

SECTION V

I

APPENDIX

I

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