McCURDY ADA-700 Manuale utente

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ADA-700

AUDIO

DISTRIBUTION

AMPLIFIER

User's

Manual

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ADA-700

AUDIO

DISTRIBUTION

AMPLIFIER

User's

Manual

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McCurdy Radio Industries

Limited

108

Carnforth

Road, Toronto, Ontario, Canada M4A 2L4

Tel: (416) 751-6262 / Fax: (416) 751-6455

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NOTICE

Mccurdy

Radio

Industries

reserves

the

right,

without

notice

to

make

such

changes

in

equipment,

design,

specifications,

or

components

as

progress

in

engineering

or

manufacturing

techniques

may

warrant

to

improve

the

performance

of

the

product.

The

proprietary

data,

information,

and

drawings

furnished

in

this

document

shall

not

be

disclosed

outside

the

org-

anization

to

which

it

is

submitted.

Duplication

of

this

document

by

any

means

in

whole

or

in

part,

for

use

in

any

manner

not

expressly

intended

by

this

release,

is

strictly

prohibited.

August,1987

Copyright

1987

Mccurdy

Radio

Industries

Limited.

I

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I

Page

i

PREFACE

Warranty

Inquiries

ADA-700

Audio

Distribution

Amplifier

Mccurdy

Radio

Industries

Limited

warrants

to

the

original

purchaser,

that

this

product

is

free

from

defects

in

materials

and

workmanship,

under

normal

use,

for

a

period

of

one

year

from

the

date

of

shipment.

In

the

event

that

Mccurdy

Radio

Industries

Limited

determines,

in

its

sole

discretion,

that

the

product

is

defective

within

the

warranty

period--

and

provided

that

the

purchaser

returns

the

product,

properly

packaged

and

freight

prepaid,

to

a

designated

Mccurdy

Radio

Industries

Limited

service

and

repair

facility--McCurdy

will,

at

its

option,

repair

or

replace

the

product.

The

repaired

product

will

be

returned

(F.O.B.

Toronto),

as

directed

by

the

customer.

No

warranty

is

implied

or

expressed

as

to

the

suitability

of

this

product

for

a

particular

usage

and

Mccurdy

Radio

Industries

Limited

is

not

liable

for

any

consequential

damages

however

caused.

All

inquiries

regarding

discrepancies

in

equipment

received,

service

under

warranty,

or

procurement

of

replacement

parts,

should

be

addressed

to:

Mccurdy

Radio

Industries

Limited

108

Carnforth

Road,

Toronto,

Ontario,

Canada

M4A

2L4

Telephone:

(416)

751-6262,

or

(212)

772-0719

Telex:

06-963533

Facsimile:

(416)

751-6455

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ADA-700

Audio

Distribution

Amplifier

Page

ii

Safety

Summary

Power

source

This

equipment

is

designed

to

operate

from

either

a

117

V

or

220

V

AC

50/60

Hz

power

source.

Grounding

This

product

is

grounded

through

the

grounding

of

the

line

cord

.

To

avoid

electrical

shock,

plug

the

line

cord

into

a

properly

wired

receptacle

before

making

any

input

or

output

connections

with

other

devices.

A

protective

ground

connection,

by

way

of

the

grounding

conductor

of

the

line

cord,

is

essential

for

safe

operation.

Power

·

line

cord

Use

only

the

line

cord

and

connector

specified

for

your

unit.

Ensure

that

the

line

cord

is

in

good

condition

and

free

of

kinks.

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I

Page

iii

ADA-700

Audio

Distribution

Amplifier

ADA-700

AUDIO

DISTRIBUTION AMPLIFIER

TABLE

OF

CONTENTS

PREFACE

Warranty

. . .

Safety

Summary

TABLE

OF

CONTENTS.

LIST

OF

DRAWINGS

...

DESCRIPTION

.....

Audio

Functional

SPECIFICATIONS .

INSTALLATION . . . . . . . . . . . . .

Unpacking

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

Preparation

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

.

REAR-PANEL

..••.

Connections.

Power

Connection

INDEX

SCHEMATICS

•.

i

ii

iii

iv

1

2

3

5

6

7

9

10

11

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ADA-700

Audio

Distribution

Amplifier

LIST

OF

ILLUSTRATIONS

AND

DRAWINGS

TITLE

Audio

Functional

Rear

Panel

Layout

In/Term

Connector

Output

1-4

Connector

Output

5-8

Connector

System/Chassis

Ground

Connector

Rear

Panel

Line

Voltage

Switch

and

Fuseholder

Audio

Schematic

Power

Supply

Schematic

Component

layout

Assembly

Drawing

External

Component

Assembly

Page

DRAWING

NUMBER

Figure

1

Figure

2

Figure

3

Figure

4

Figure

5

Figure

6

Figure

7

D-ADA-700/2-1

C-ADA-700/2-2

D-ADA-700/8-1

D-ADA-700/8-2

D-ADA-700/8-3

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8

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11

12 I

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14

15

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Page

1 ADA-700

Audio

Distribution

Amplifier

ADA-700

AUDIO

DISTRIBUTION AMPLIFIER

DESCRIPTION

A

rugged

and

reliable

performer,

the

Mccurdy

ADA-700

consists

of

two,

independent,

distribution

amplifiers

and

a

self-contained

power

supply

within

a

sturdy

housing.

The

compact

housing,

of

standard

width,

requires

only

one

unit

of

rack

height.

The

distribution

amplifier,

for

custom

applications

in

broadcast

and

professional

audio

equipment,

is

almost

noise-

and

distortion-free.

In

stereo

service,

ADA-700

supplies

amplified

power

to

eight

outputs.

Each

output

can

be

individually

adjusted

by

the

convenient

front-

panel

controls

within

a

range

of

34

dB.

The

space

and

power

requirements

for

the

ADA-700

are

minimal.

The

unit,

only

1.75"

high

fits

a

standard

19''

(483

mm)

rack.

An

AC

power-entry

module,

with

a

built-in

fuse

and

voltage

selector

switch,

can

be

easily

switched

to

either

117

V, 60Hz

or

220

V,

50Hz

service.

The

compact

ADA-700

has

other

features;

these,

apparent

only

to

those

who

have

reason

to

examine

the

interior

of

the

unit,

include;

1

Reg'd

TM.

o

miniaturized,

solid-state

circuitry.

The

circuitry

is

assembled

on

a

high-quality,

glass

epoxy

printed

circuit

board.

o

quiet,

toroidal-transformer

power

supply,

o

reliable,

Molex

"Mini-fit"

Jr(

1

)connectors,

o

150/600

ohm

input

termination

that,

by

means

of

jumpers,

can

be

readily

inserted.

www.SteamPoweredRadio.Com

ADA-700

Audio

Distribution

Amplifier

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ADA-700

AUDIO

FUNCTIONAL

Page

2

OUTPUTS

+B4Bu

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Page

3 ADA-700

Audio

Distribution

Amplifier

SPECIFICATIONS

Amplifiers

Two;

in

stereo

service,

they

are

used

to

drive

eight

outputs

from

one

input.

Input

level

-22

to

+14

dBu

nominal

for

+8

dBm

output.

Maximum

+28

dBu.

Input

impedance

Output

level

Output

source

impedance

Output

isolation

Output

de

offset

Gain

adjustment

>20

K

ohms

active,

balanced.

+28

dBm,

maximum;

600

ohm

(minimum)

terminated

outputs.

60

ohm,

active

balanced.

>80

dB, 20

Hz

to

20

kHz.

<±50

mv

Each

output

split

can

be

adjusted

independently

within

a

range

of

34

dB.

Frequency

response

+0,-0.2dB,

20

Hz

to

20

kHz.

Noise

Total

harmonic

distortion

Inter-modulation

distortion

124

dB

below

maximum

output

at

unity

gain.

20

Hz

to

30

kHz.

",

Nominally

114dB

below

+18dBu

terminated

(600

ohm)

output

unity

gain

(20

Hz

to

30

KHz)

Typically

104

dB

below

+8dBm

<0.01%

(20

Hz

to

20

kHz)

at

unity

gain.

Up

to

+28

output

level

with

600

ohm

outputs.

<0.008%

at

unity

gain.

Up

to

+28dBm

output

level

600

ohms

terminated

(4:1

ratio)

Typically

<0.001%

at

+8 dBm.

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