Universal Audio 1122 Manuale utente

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model 1122

STEREO TRANSCRIPTION PREAMPLIFIER

products of

UNITED

RECORDING

ELECTRONICS

INDUSTRIES

8460

SAN

FERNANDO

RD.

, SUN

VALLEY,

CALIFORNIA

91352

TELEX

1389

UREI

SNVY

(213) 767-

1000

•[ill~

company

www.SteamPoweredRadio.Com

BEFORE

PROCEEDING

WITH

COMPLETE UNPACKING

AND

SETUP,

CONSULT UNPACKING

AND

INSPECTION INSTRUCTIONS ON

PAGE

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.

1978,

UREI

www.SteamPoweredRadio.Com

TABLE

CONTENTS

SECTION

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

APPENDIX

FIGURE

PLOTTED

GRAPH

FIGURE

SCHEMATIC

DIAGRAM

URE!

MODEL

1122

PAGE

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SECTION I

INTRODUCTION

model

1122

TRANSCRIPTION PREAMPLIFIER

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Figure

Model

1122

Front

Panel

1.1

DESCRIPTION

The

1122

two-channel,

solid-state,

equalized

preamplifier/

line

amplifier

desi

ned

provide

the

highest

quality

disc

reprod-

uction

for

broadcast

and

recording

applications.

While

primarily

intended

for

stereo

use,

may

utilized

very

effectivedly

for

two

separate

monophonic

channels.

Any

magnetic

pickup

designed

for

operation

with

47,000

ohm

termination

may

used

with

the

Model

1122,

and

its

wide

dynamic

range

provides

faithful

reproduction

from

low

level

classical

recordings

maximum

excursion

single

records.

Outputs

are

balanced

for

600-ohm

150-ohm

lines

(approximately

ohms

actual).

Installation

simple,

and

with

standard

grounding

practices

the

1122

exceptionally

immune

interference.

High

frequ

ncy

and

low

frequency

trimmers

are

provided

for

each

channel,

allow

balancing

the

response

stereo

cartridge

or of

two

monophonic

cartridges

-1-

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1.2

TECHNICAL

SPECIFICTIO

t S

ELECTRICAL

PHYSICAL

FREQUENCY

PONSE: RIAA/NAB

disc

playback

character-

istic

within

±1

from

kHz;

(NAB

1964

Disc

Standard,

recommended

low

frequency

roll-off

dB/octave,

3 dB

down

Hz).

INPUT IMPE

NCE:

47,000

ohms.

GAIN:

DISTORTION:

HUH

AND

NOISE:

OUTPUT:

OUTPUT

IMPEDANCE:

CHANNEL

SEPARATION:

ENVIRONMENT:

R REQUIREMENTS:

ION

NISH :

-2-

dB,

continuously

variable.

Less

than

0.5%

THD

+20

dBm,

from

kHz.

least

below

dBm

output,

(gain

set

for

dBm

output

with

rnV

input,

kHz

band-

pass

filter).

Floating,

transformer

isolated

For

600

150

ohm

balanced

line

(aproximately

ohm

actual)

minimum

kHz,

minimum

l kHz ,

minimum

100

Operating

within

0.5

all

speci

ications

from

-5°C

+55°C

(23°F

131°F).

100

125

VAC

250

VAC,strappable,

50/60

Hz,

less

than

195

95.3

rack

panel;

depth

hind

anel

232

mm;

(7-11/16

3-3/4

9-1/8").

Pa ne l

3.18

(1/8")

brushed

ack

anodized

aluminum.

Chassis

cadmium

plated

steel.

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WEIGHT:

SHIPPING

~,EIGHT:

1.3

CONTROLS

CHANNEL

LEVEL:

RESPONSE

TRI

MERS

1.4

CONNECTIONS

INPUT:

OUTPUT:

2.67

lb.,

oz.).

kg (7 1

) .

Located

the

front

panel

and

marked

Level"

and

Level".

Used

adjust

the

overall

opera-

ting

level

and

balance

the

individual

levels

the

two

channels.

Located

inside

the

unit

the

PC-

board.

Used

balance

the

re-

sponse

the

two

channels

stereo

cartridge,

two

mono-

phonic

cartridges.

High

and

low

frequency

response

trimmers

are

provided

for

each

channel.

CA-type

jacks

the

rear

panel

Barrier

strip

terminal

the

rear

panel

(See

installation

instruc-

tions,

Section

II,

Figures

2 &

3.)

-3-

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SECTION

INSPECTION

AND

INSTALLATION

2.1

UNPACKING

AND

INSPECTION

The

Model

1122

was

carefully

packed

the

factory,

and

the

container

was

designed

protect

the

unit

from

rough

handling.

Nevertheless,

recommend

careful

examination

the

shipping

carton

and

its

contents

for

any

sign

physical

damage

which

could

have

occurred

transit.

damage

evident,

not

destroy

any

the

packing

mater-

ial

the

carton,

and

immediately

notify

the

carrier

possible

claim

for

damage.

Shipping

claims

must

made

the

consignee.

The

shipment

should

include:

Model

1122

Stereo

Transcription

Preamplifier

UREI

Instruction

anual

Two-part

Warranty

Card

bearing

the

same

serial

number

the

Model

1122.

2.2

ENVIRONMENTAL

CONSIDERATIONS

The

system

will

operate

satisfactorily

over

range

ambient

temperatures

from

-5°C

+55°C

(+23°F

131°F),

and

80%

relative

humidity.

the

system

installed

equipment

rack

together

with

high

heat

producing

equipment

(such

power

amplifiers),

adequate

ventilation

should

provided

prolong

the

life

components.

Also,

while

circuitry

susceptible

hum

pick-up

sufficiently

shielded

from

moderate

electromagnetic

fields

installation

should

planned

avoid

mounting

the

system

immediately

adjacent

large

power

transformers,

motors,

etc.

2.3

POWERING

Unless

tag

the

line

cord

specifies

otherwise,

the

Model

1122

was

shipped

ready

for

operation

with

nominal

115

VAC

power

mains.

order

change

this

for

nominal

230

VAC,

(50

Hz) ,

the

strapping

the

power

transformer

must

changed.

Remove

the

jumpers

between

terminals

and

also

between

terminals

and

Instead,

add

jumper

from

terminal

sure

change

the

fuse

the

correct

value:

1/8

slo-blo

when

changing

230

operation,

1/4

slo-blo

for

115

operation.

-4-

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2.4

EXTERNAL

CONNECTIONS

2.4.1

INPUT

CONNECTIONS

Input

connections

are

made

the

1122

through

two

"RCA"

type

standard

phone

jacks

the

rear

chassis,

marked

"A"

and

"B".

Most

phone

pickup

arms

are

equipped

with

shielded

cables

terminating

plugs

which

will

directly

mate

with

the

1122

jacks.

The

Model

1122

must

physically

located

allow

direct

connection

via

these

short

cables,

any

attempt

extend

them

with

additional

cable

extension

cables

will

result

loss

high

frequencies

due

the

added

shunt

capacitance.

2.4.2

OUTPUT

CONNECTIONS

Permanent

output

signal

wires

should

shielded

cable,

and

connected

accordance

with

standard

wiring

practice,

indicated

the

rear

panel

barrier

strip.

the

Hodel

1122

output

connected

high

impedance

circuit,

recommended

shunting

the"

±"

and

"COM"

output

ter-

minal

with

620

ohm,

1/2

watt

resistors.

This

assures

optimum

for

the

Model

1122.

(Illustrations

page)

-5-

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Figure

GRD

Connecting

The

Model

1122

With

Balanced

Output

Circuits.

GRD

OUTPUT

Connecting

The

Model

1122

With

Unbalanced

Output

Circuits.

-6-

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SECTION

III

OPERATING INSTRUCTIONS

3 . 1

GENERAL

After

the

Preamplifier

has

been

installed

and

connected

both

the

signal

source

and

the

succeeding

equipment

according

Section

power

may

turned

ON.

The

output

level

may

adjusted

individually

for

each

channel

the

recessed,

screwdriver

operated

controls

the

front

panel.

3 . 2

FREQUENCY

RESPONSE

CHARACTERISTICS

Initially

the

frequency

response

was

adjusted

the

factory

conform

with

standard

RIAA/NAB

characteristics.

oth

low

and

high

frequency

response

may

changed

within

envelope

shown

the

graph

Figure

(Appendix).

The

frequency

adjustments

are

located

the

printed

circuit

board

and

are

accessible

after

the

cover

has

been

removed

from

the

odel

1122

. (

See

Figure

4 . )

Figure

4 .

Response

Tri

ers

(Top

-7-

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