Harris GATES M-6035 Bedienungsanleitung

1USTRUCTION

EGUK

INSTRUCTION

BOOK

FOR

M-6035

CUE-

INTERCOM

AMPLIFIER

88 -

108

r1=-71

tib

Q d

eizià

;

Juno

1965

GATES

RADIO

COMPANY •

QUINCY,

ILLINOIS

62301

U.S.A.

Division

Harris-Intertype

Corporation

•

INSTALLATION

AND OPERATING

1.1STRUCTION

FOR

M-6035

CUE-

INTERCOM

AMPLIFIER

•

GAIN:

FREQUENCY

RESPONSE:

HARMONIC

DISTORTION:

NOISE:

SOURCE

IMPEDANCE:

OUTPUT

LOAD

IMPEDANCE:

MAXIMUM

INPUT

LEVEL:

MAXIMUM

OUTPUT

LEVEL:

TECHNICAL

DATA

DB ±

DB @

Variable -

Requires

10K

varia-

ble

resistor. (

Part

Console)

Peaked

for

maximum

intelli-

gibility.

Under

at +

DBM (.

mid-

band

frequencies.

-105

DBM

equivalent

input

noise.

Ohms.

Ohms. (

High

Impedance

Speaker)

-40

DBM.

+30

DBM.

MAXIMUM

OPERA-

TING

AMBIENT

•

TEMPERATURE:

55°

C. (

131°

F.)

MAXIMUM

STORAGE

AMBIENT

TEMPERATURE:

85°

C. (

185°

F.)

POWER

REQUIRE-

MENTS: -

DC (

unregulated)

10 -

ma.

•

TRANSISTORS:

2N214

2N1183

2N1414

2N5088

2N5087

SIZE:

3-1/4"Wide

7-1/2*Long

Thick.

DESCRIPTION

The

Gates M-6035

Transistor

Cue-

Intercom

Ampli-

fier

designed

used

transistor

consoles

for

cueing

and

talkback

purposes.

The

amplifier

utilizes

gain

control

for

adjusting

different

input

levels.

The

amplifier

designed

fed

from

ohm

source

and

operate

into

ohm

speaker

resistive

load.

The

amplifier

designed

used

with

the

M-6039

mounting

frame,

which

carries

mating

re-

ceptacle

for

the

printed

card type

connection.

The

connections

the

printed

wiring

board

are

gold

flashed

for

positive

connection

with

the

gold

con-

tacts

the

mating

receptacle.

WThe

amplifier

requires

a -

unregulated

power

source

and

requires

from 10

iña. (

average

power

output)

maximum

ma. (

at +

DBM

output).

THEORY

OPERATION

For

the

purpose

explanation,

the

Cue-

Intercom

Amplifier

can

considered

made

two

distinct

parts:

The

preamplifier,

and

the

power

amplifier.

THE

PREAMPLIFIER

The

two

stage

preamplifier

driven

input

transformer

which

somewhat

loaded

the

in-

put

resistor.

This

resistor

prevents

excessive

signals

from

being

developed

the

speaker

its

resonance

frequency,

which

would

over-

drive

the

input

stage.

Both

stages

are

the

common

emitter

configuration,

with

direct

coupling

utilized

between

the

stages.

the

schematic,

837

9345

001,

should

noted

that

NPN

type

transistor

and

has

its

emitter

returned

B-

for

biasing

pur-

poses.

Biasing

is.

accomplished

combination

volt-

age

divider

and

emitter

resistance

with

R1,

and

R5.

This

method

biasing

also

insures

high

degree

temperature

stability.

Signal

degenera-

tion

also

for

R7.

The

volume

control, (

located

the

console)

situa-

ted

between

the

preamplifier

and

power

amplifier,

connected

reverse,

maintain

the

high

source

impedance

all

settings that

the

power

amplifier

requires.

THE

POWER

AMPLIFIER

The

output

stages

the

power

amplifier

operate

Class

and

are

arranged

the

circuit

configura-

tion

known

as "

single

ended

push-pull",

or "

follow-

emitter

follower".

The

upper

and

lower

units

are

series

across

the

power

supply,

and

the

load

connected

their

junction,

when

the

signal

the

collector

goes

negative

and

conduct,

since they

are

all

PNP

types.

When

the

signal

goes

positive

and

conduct

since

NPN

type.

Thus,

the

full

signal

appears

the

junction

point.

Note

that

the

only

stage

the

power

ampli-

fier

with

this

voltage

gain.

high

frequency

trans-

istor

used

this

point

improve

stability.

Several

feedback

loops

are

employed

this

cir-

cuit,

including

R10,

C7,

C10,

and

C9,

and

C10

provide

high

frequency

stability,

C12

supplies

posi-

tive

feedback

from

the

output

the

collector

cir-

cuit

increase

the

signal

handling

capability

this

stage.

MAINTENANCE

PREVENTIVE

MAINTENANCE

The

M-6035

Cue-

Intercom

Amplifier

designed

for

long,

trouble-

free

service.

However,

with

all

high

quality

electronic

equipment,

regular

program

inspection

should

followed.

recommended

that

when

the

amplifier

first

received,

part

the

console,

D.C.

voltage

measured

with

the

same

voltmeter

that

will

used

for

maintenance

and

troubleshooting,

and

these

•

readings

recorded

the

amplifier

schematic

bove

the

typical

voltages

shown.

SERVICING

When

servicing

the

amplifier,

the

following

points

should

observed.

The

condition

the

output

stage

measuring

the

speaker bus

voltage

the

junction

R21

and

the

collector

Q8.

Circuit

resistances

should

measured

only

af-

ter

removing

the

associated

transistor or

trans-

istors,

prevent

damage

due

ohmmeter

bat-

tery

voltage.

DO NOT

remove

insert

transistors

with

the

power

ON.

NOT

probe

the

printed

board

with

metal

probe

with

the

power

ON.

Circuit

voltages

are

reversed

from standard

va-

cuum

tube

practice,

the

polarity

all

electrolytic

capacitors.

The

location

the

positive

end

each

elec-

trolytic

capacitor

indicated

the

white dot

marked

the top

the

circuit

board.

PARTS

LIST

Symbol

No.

Gates

Stock

No.

Description

Cl,

C2, C3,

C4,

522

0242

000

Cap.,

mfd,

506 0005 000

Cap., .

mfd.,

200

522 0178

000

Cap.,

mfd.,

6 —

—37 ','

DC —

1T111NPUT

—

(T1)1NPUT—

VOL.

CONT.

—

VOL

CONY •

TOP —

11+60NO.

RETUI:N —

OUTPUT —

•

—T

sccor4r.trr

GREEN

Ti 5E

CONDARY

ILACK

Symbol

No.

C7,

C12

C13

C14

Q2,

Q3, Q4,

Q7,

Gates

Stock

No.

Description

516

0054

000

Cap., .

001

mfd.,

1KV,

10%

522

0256

000

Cap.,

mfd.,

522

0246

000

Cap.,

100

mfd.,

506

0006

000

Cap., .

mfd.,

200

506

0004

000

Cap., .

mfd.,

200

380

0115

000

Transistor,

2N5088

380

0011

000

Transistor,

2N214

380

0112

000

Transistor,

2N5087

380

0014

000

Transistor,

2N1414

380

0012

000

Transistor,

2N1183

121

R2,

R7,

R9,

R19,

R20

R10,

R14

RII

R12,

R18

R13

R15

R16

R23

R2,4

R21,

R22

R25

R17

XD1,

XD2

XQ1,

XQ2,

XQ3, XQ4,

XQ5,

XQ6

XQ7,

XQ8

540

0081

000

540

0071

000

540

0076

000

540

0075

000

540

0057

000

540

0036

000

540

0045

000

540

0041

000

540

0073

000

540

0085

000

540

0039

000

540

0098

000

540

0049

000

540

0070

000

540

0017

000

540

0023

000

540

0005

000

540

0845

000

540

0025

000

478

02851)00

Res.,

22K

ohm,

1/2

W.,

Res.,

8200

ohm,

1/2

W.,

Res.,

13K

ohm,

1/2

W.,

Res.,

12K

ohm,

1/2

W.,

Res.,

2200

ohm,

1/2W.,

Res.,

300

ohm,

1/2W..

Res.,

680

ohm, 1/2

W.,

Res.,

470

ohm,

1/2

W.,

Res.,

10K

ohm,

1/2

W.,

10%

Res.,

33K

ohm,

1/2

W.,

Res.,

390

ohm,

112W.,

Res.,

110K

ohm,

1/2

W.,

Res.,

ohm,

1/2

W.,

Res.,

7500

olun,

1/2W.,

Res.,

ohm,

1/2

W.,

Res.,

ohm,

1/2

W.,

Res.,

ohm,

1/2W.,

Res.,

6.8

ohm,

1/2

W.,

Res.,

100

ohm,

1/2W.,

Transformer,

Input

404

0227

000

Dissipator

404

0066

000

Socket

404

0149

000

Socket

C12

122

C13

•

45.1

DI.Vr

µ4

Llee

-37

G,'

Zo.

serge

RADIO

CON

•USCV.

Wools

C-79.eq

/CALI

100 100

1. 1.

108

101

LIST

OTT.

Orr

OTT

OTY

11001

ION

DITOCIDITION

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INDICATES

SOLDER LUG

1Y)

•TAT1.1111

oat

0•111.11.10t1r1

••••••••••

rig —

-C

SCHEMATIC

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CHSY

•

00TkI

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7f'5

101011.

•

INSTALLATION

AND

OPERATING

INSTRUCTIONS

FOR

M-6034

TRANSISTOR

PREAMPLIFIER

TECHNICAL

DATA

GAIN:

DB ±

operated

into

600

ohm

load.

FREQUENCY

RESPONSE: ±

DB,

cps

15,000

cps.

HARMONIC

DISTORTION:

Under 0.5%

from

cps

at +

DBM

output.

Under

0.5%

from

cps

at.--

DBM

output.

INTERNIODULATION

DISTORTION:

Under

0.5%

at —

DBM

output

level,

and

under

1.0%

at +

DBM

output

level.

Distortion

measured

equiva-

lent

sine

wave

output

using

cps

and

mixed

NOISE

LEVEL: —

122

DBM

equivalent

input

noise.

SOURCE

IMPEDANCE:

30/50

and

150/250

ohms.

INPUT

IMPEDANCE:

Input

transformer

unloaded,

re-

sulting

input

impedance

being

substantially

higher

than

source

impedance.

OUTPUT

LOAD

IMPEDANCE:

MAXIMUM

INPUT

LEVEL:

MAXIMUM

OUTPUT

LEVEL:

600

ohms ±

10%.

—40

DBM.

MAXIMUM

OPERATING

AMBIENT

TEMPERATURE:

55°

C. (

131°

F.)

MAXIMUM

STORAGE

AMBIENT

TEMPERATURE:

POWER

REQUIRE-

MENTS:

TRANSISTORS:

MOUNTING:

85°

C. (

185°

F.)

—30

with

less

than .

ripple.

3 -

2N5087

1 -

40319

Requires

M-6039

mounting

frame.

SIZE:

3-1/4"

Wide

6-3/8"

Long

Thick.

DESCRIPTION

The

Gates

M-6034

Transistor

Preamplifier

premium

quality

low

noise

unit

for

use

consoles,

and

com-

pletely

temperature

conipensated

using

the

latest

tech-

niques.

The

amplifier

has

gain

with

maxi-

mum

output

unbaraneed

and

transformerless,

which

designed

operate

into

600

ohm

variable

attenua-

tor.

The

input

balanced,

and

connected

for

150/250

ohm

source

impedance

the

factory

but

may

recon-

nected

for

30/50

ohms.

THEORY

OPERATION

This

amplifier

designed

provide

fixed

gain of

DB.

four-

stage

amplifier

and

utilizes

trans-

formerless

output.

features

negative

feedback

re-

duce

distortion

very

low

level

and

minimizes

specification

changes

with

transistor

changes.

Signal

applied

pins

and

fed

through

transformer,

Ti,

the

base

Q1 (

2N1307).

low

noise

transistor

operated

ideal

collector

current

for

minimum

noise.

will

noted

that

the

first

stage

series

fed

through

provide

the

maximum

input

gain

from

Ti.

and

are

connected

across

the

secon-

dary of

stabilize

the

amplifier.

The

value

and

were

picked

provide

roll

off

above

the

audio

range

prevent

amplification

very high

frequency

noise.

The

signal

then

direct

coupled

from

the

collector

the

base

Q2.

Q2 .

very

high

gain

stage

be-

cause

the

emitter

completely

by-passed.

The

signal

then

coupled

from

the

collector

Q2 (

thru

C8)

Q3.

The

collector

direct

coupled

the

base

Q4.

emitter

follower.

Emitter

followers

are

very

stable

and

are

virtually

distortionless.

This

also

provides

the

low

output

impedance

required

feed

600

ohm

fader.

Feedback

applied

from

R17

through

R13

and

C9,

and

the

emitter

resistor

(R6) of

the

first

stage.

R13

and

provide

boost

cps

make

the

response

flat

the

audio

range.

MAINTENANCE •

Transistor

amplifiers

are

designed

for

long

trouble-

free

life,

however,

dust

and

dirt

can

cause

trouble.

monthly

dusting

with

soft

brush

should

adequate.

SHOULD

TROUBLE

OCCUR -

Step

1 -

First

check

all

voltages.

The

voltages

determine

the

bias

points

the

transistors

and

any

departure

20%

should be

considered

defect.

NOTE:

Use

of the

resis-

tance

chart

will

help

detect

faulty

components.

Step

2 -

Before

any

signal

measurements

are

made,

re-

place

any

defective

parts

make

voltages

correct.

Step

3 -

After

all

voltages

are

correct,

signal

tests

may

performed.

The

correct (

RMS)

voltages

are

shown

the

schematic

diagram.

Voltages

shown

are

for —

DBM

input

150

ohms

not

terminated.

NOT

remove

insert

transistors

with

the

power

ON.

Gates Radio

Company

Quincy,

Illinois

•

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