Ampex 401 Schematic

1,

HOLLYWOOD

DKPT

TO:

MAGNETIC

&

VINE

P0BOX

MODEL

ma

Zast

401

RECOISDEH

HOLLYWOOD

EE’CTRONft

28

CALIF

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t

II

MODEL

401

except re-cord

401

can

erasing

level

adjustment.

follows features.

recordings

The

the

head

over-the

be

played

the

The

applies

Both

Model

a-s-sembly.

full

back

unused

Installation

in

the

400

recorded

401

width

portion

all

and

identical

is

on

&

respects

401

on

any

The

of

the

Model

of

the

Operation

other

will AMPEX

to

the

401

incorporate-s

tape.

300

tape

Manual

than

play

Made-I

Thus

and

the half

back

recorder.

tapes

Model

without

of

either

400

--heads

necessitating

the

Model

track

full

in

every

recorded

201

without

or

to-erase

400

record

half

respect

on

pre

which

track

and

the

ISSUE

EFFECTIVE

NUMBER

SERIAL

3 #2722

SECTION

Index

AMPEX

INSTALLATION

of

SECTIONS,

I

11

UI

IV

VI

SPECIFICATIONS

INSTALLATION

OPERATION

HEAD

V

ELECTRONIC

MAINTENANCE

MODEL

&

CIRCUITS

ASSEMBLY

ALIGNMENT

OPERATION

AND

SPECIAL

400

MANUAL

AND

DRAWINGS

PRECAUTIONS

-

IN

USE

SECTION

FIGURE

VII

PARTS

1

ELECTRONIC

2

POWER

3

CONTROL

4

CONNECTION

5

CONNECTION

6

TOP

7

ELECTRONIC

8

ELECTRONIC

9

MECHANICAL

LISTS

SUPPLY

PLATE

4ND

SCHEMATIC

CIRCUITS

DIAGRAM

ASSEMBLY

LINKAGE

STOCK

NUMBERS

DIAGRAM

FOR

HIGH

30

FRONT

TOP

DIAGRAM

IMPEDANCE

AND

PANEL

VIEW

50

OHM

MICRO

PHONE

MICRO

PHONES

3-12-51

SPECIFICATIONS

-

MODEL

400

Tape motor

Speed.

speed

Frequency

Signal-to-Noise

second

By level

peak erase

and

definition,

to-

the

recording

noise quencies ing

level

total

a

400

r.

cycle

m.

change

Re

At

15

inches

the

total

level

are between is defined

s.

harmonic

tone.

15

inches per and

sponse

15

inches

7

i/a

inches

Ratio.

per

signal-to-noise

unweighted

and

included,

30

and

as

that

equalization

+

4-

+

second,

playback

in

the

as

well

15,

000

level

distortion

second

2db.

2

db,

4

db.

Over

as

ratio

absence

as

cycles

at

which the

does

and

7.5

switches

50-15,000

70

-

10,

30

-

15,

55db.

defined

noise

by

is

the

when

ofanew

playback

are measured.

not

exceed

inches per

conveniently

cycles

000

cycles

000

cycles

atboth7l/Zinchesper

the

N. A. B.

ratio

of

erasing

signal.

peak

a Thus,

amplifier noise.

The

overall

3%

input

when

second,

located.

standards.

recording

signal

peak

to

output

measured

of

bias

All

record

with

and

fre

on

Starting

full

to ever

power

Stopping less

than

Flutter all

flutter

At71/2

Playback

Playing

64

minutes

may

also

record

speed

2

inches

and

components

inches

Time.

at

be

on

only

Time

in

is

on.

Time.

Timing

7.

used.

R.M.A, standards, half,

effecting

Rewind

twice

a

Time.

the

50%

.

less

after

Wow,

per

second

inch

5

The

one-half

amount

saving

Instantaneous.

than

i/io

When

stop

AtlSi.p.s.

from

under 1/4%.

Accuracy.

32

minutes

speed

Model of

the

turning

By

of

program

in

tape.

One

and

second

playing

switch is

300

0

to

at

on

each

400

standard

the

half

a

When

because

atl5

operated.

well

cycles

2/10%.

15

inch speed

track.

Magnetic

1/4"

reel

can

be

minutes

starting

capstan

inches per

under

2/10%

using

with

The

Tape

wide

ovek’and

stored

for

onasingle

the

motor

second,

a

tone

standard

Recorder

tape

in

recording

full

N,A..

tape

operates

the

r.m,s,

of

3,

R.

is designed

accordance

on

reel,

accelerates

tape

measuring

000

cycles.

N. A. B.

M.

A.

the

other thereby

ree1

when

moves

reel;

reel

to

with

Model

4-jQ

Section

I

Page

1

Ope

ration Selector.

FAST

FORWARD,

energizes

ling

back

operation

record

and

to

the

forth

relay,

other.

PLAY,

of

tape

STOP,

which

made

single

A

drops

and

possible

selector

REWIND.

when

out

by

control

A

machine

changing

lever

separate

is

from

is

record

stopped.

one

used for

Shutt

mode

button

of

Complete

back heads

Simultaneous

hers

and

Input.

level

or

low

unbalanced.

Playback

unbalanced.

Metering.

vides

for:

a.

b.

c,

Plug-In

are

contained in

Monitoring,

heads

A

switch

allow

allows

impedance

Amplifier.

4

inch

A

Direct

Monitor

cording

monitor

of

or

Reading bias

Head

the

input

VU

recorded

during

current.

tape

the

or

of

single

a

to

recorder

to

Plus

meter

record

output

playback.

Housing,

Separate

be

monitored

bridge

4

VU

is

input

plug-in

to

600

output

mounted

signal

Erase,

head

record,

housing.

recordandplaybackampli

while

recording.

accommodate

ohms

on

into

plus

the

4

600

front

before

from

playback head

VU

ohms

or

either

panel

during

and

line

balanced

play

microphone

balanced

and

pro

recording.

while

re

or

d.

Phone

monitor

recorded

back.

An

A-B

made

between

cording

comparison

Mountings.

Dime

ard

rack

mounting.

mounted

Reading

Monitoring.

of

output

switch

is

being

n s

ions

mounting.

in

record

signal

is

incorporated

the

made.

and

monitoring.

Rack

.

Power

the

portable case,

erase current.

phone

A

input

signal

from

before

playback

in

original

or

program

The

portable

same

Mechanical unit

Electronic

supply

is

monitor

order

switch

case,

is

unit

ona5

Portable

or

head

and

mounted

is

mounted

Model

jack

during

while

that

direct

the

recorded

transfers

on

1/4’ panel

case

holding

400

provided

is

recording,

recording

comparison can

program

the

VU

15

on

3/4"

7"

for

panel

rack

both

Section

for

and

or

meter

for

mounting,

mechanical

the

I

Page

direct

monitor

during

while

for

standard

be

a

for

stand

2

of

play

re

level

or

4-11-51

unit

ly

13

and

3/4"

the

electronic assembly

high,

17

1/2"

deep,

and

has

20"

overall

wide.

dimensions

oh

approximate

Weight.

case.

Approximately

75

pounds

for

complete unit

in

portable

Model

400

Section

I

Page

3

4-11-51

IMPORTANT:

INSTALLATION

Before

ing

sections

The

relay electronic

ical

imity

further

lease

numbers set

designations

I.

able

the line

a

or playing

or

PUT

rack

assembly,

to

the

information

All

the

OUTPUT:

A.

Plus

across

chassis

ground.

to

all

times

if the

output

TERMINATION

on

with

power

electronic

connections

front

off

in

For

terminals

ground.

in

back.

attempting

installation

portable

rack

the

or

panel

in

Fig.

4

VU,

It

order

is

to

and

machine

mounted

mechanical

supply

at

least

on

cover by unlatching

parentheses

6

Studio

600

If

necessary

is

to

Therefore,

connected,

not

switch,

machine

panel

5"

assembly

rack

are

and

Fig.

ohm

2

and

unbalanced

maintain

mounting,

readily

Line:

3

operate

operation.

is

shipped

unit

above

should

below the

will

in

the

7.

line

output,

of the

output

to

supply

correct

if

the

output

such

13,

must

the

recorder, first

ready-to-operate

in

a

should

be

result

accessible

following

LINE

be

mounted

the

main

mounted

electronic assembly.

in

increased

see

as

and

balanced

OUT

is 600

meter

is

on

be

Page

switched

3

from

removing

text

connector,

desired,

ohm

calibration

not feeding

remote

electronic

directly

this

of

the

refer

or

unbalanced,

tie

termination

pickups,

to

read

on

a

above

hum

section,

front

the top

to

either

a

terminated

IN.

standard

panel.

Greater

level.

the

12.

while

the

condition.

the

panel.

cover.

numbered

Pin1is

side

to

this

recording

LINE

follow

19"

mechan

For

is

avail

of

The

prox

Re

The

the

output

line

OUT

the

ground switch,

plained

amplifier

side

15,

in

B.

Connect

of the

A

above.

For

Input:

input.

must

Connection

3

Strap

amplifier

be

left

of

the

in

pins

LINE

input.

the

to

OUT

1

and

position

High

connector,

of

the

2

The LINE

designated

Model

Impedance

connector

OUTPUT

400

12,

IN

Section

Amplifier

to

the

high

and

connect

TERMINATION

all

at

times,

II

Page

1

side

to

as

3-26-51

of

the

ex

II.

INPUT:

is

in

the

microphone

shield

position.

step

phones obtained

necessary,

found

ination

er

this

microphones

to

up

to exist.

than

equipment.

The

A.

Any

range

The

for

having

by

will

50

High

ohms.

following

Microphones:

low

impedance

of

30

to

pins

1.

Place

microphone

a

150

to

50

ohms

strapping

however,

If

the

exist

should

impedance

In

is

not

inputs

250

to

2

and

3

the

input

250

ohm

or

the

input

and

input

the

microphones

general,

satisfactory

are

microphone,

ohms

of

the

INPUT

transformer

source.

less

impedance,

as

should

is

re-strapped,

input

the

provided:

can

be

input

TRANSFER

shown

not

be

fed

be

are

quality

for

professional

the

plugged

connection,

is

Therefore,

in

done

from

not

obtainable

nominal impedance

in

directly.

14.

SWITCH,

strapped

in

6

Fig.

serious frequency

additional

db.

5.

unless

source

a

recommended for

from

work.

15,

for

the

case

This

insufficient

impedance

high

of

which

Connect

Connect cable

in

the

MIC

the

optimum

of

micro

gain

can

is

not

usually

gain

discrim

great

use

on

impedance

be

is

microphone,

1

is

BRIDGE

dated.

level

4VU.

be

the

series

the

must

accommodated

wired

value

output

be

In

the

B.

Connect

ground.

Edsition.

The

If the

For

in

of

with

side

fed

C.

event

the

Bridging

balanced

load

input

bridging

line

the

which

each

of

to

the

Bridging

that

input

Place

Input

placed

transformer

on

higher

to

should

side

of

the

two

microphone

it

circuit

a

line

the

levels

on

the

an

becomes

Balanced

to

INPUT

the line

balanced

or

machine.

be

50,

line,

bridging

Unbalanced

will

of

is

lower

000

input

necessary

have

pins

minus

restrapped

A 50

rest.tors.

to

Studio

2

and

TRANSFER

is approximately

bridge

level

This

times

ohm

f

the

be

3

10

lines,

would

ti..

recorder.

to

re-wired

of

to

plus

for

position

RMS

resistor

The

Source

connect

Line:

the

input

SWITCH,

10

50

is

an

external

consist

program

output

as

VU

100,

ohms,

minus

should

a

high

shown

connector,

15,

can

be

000

ohms.

the

16

bridge

of a

resistance,

voltage,

terminate

of

the

impedance

in

the

accommo

input

to

bridge

Fig.

plus

4.

14. SAL

can

in

Connect

unbalanced

line,

radio

tu:.r,

Model

400

etc.

,

Section

to

pins

3

and1of

II

Page

2

the

input

TRANSFER

nection

grcater

connector

,rovides

than

SWITCH,

100,

i/a

volt.

14.

000

15,

in

ohms

us

the

bridging

the

ground

UNBAL.

of

side.

BRIDGE

any

RMS

Place

position.

program

the

INPUT

This

voltage

con

III.

jack cording.

IV,

lowing

PHONES:

Any

11,

provided

RECOMMENDED

If

two

placement

1.

2.

3.

4.

5.

6,

sensitive

400s

Install

high

for

monitoring

or

4Ols

is

recommended

a13/4

below

the

Electronic

a13/4

the

Mechanical

the

Electronic

impedance

RACK MOUNTING

are

to

inch

spacer

this

panel

inch

or

head

of

incoming

be

mounted

starting

the

Assembly

3

i/a

Assembly

phones

at

panel

Mechanical

for

inch

#2.

can

line

or

OF

TWO

onastandard

top

the

at

the top

Assembly

machine

spacer

#2.

be

playback

MACHINES:

of the

#1.

panel.

plugged

rack,

rack:

rack.

for

of

in

the re

the

machine

fol

#1.

7.

S.

Install

The

to

It

is

an

a51/4

both

cable

be

:vtendcd

important

Electronic

power

on

the

Assembly!

inch

in

that

or

supply

power

length.

no

7

inch

supply

power

panels

spacer

for

supply

panel.

at

the

bottom.

the

be

upper

closer

.recorder

than

5

will

inches

have

to

Model

400

Section

II

Page

3

3-26-Si

I. equipped

R.

iv!.

turntable

A.

REEL SIZE:

to

handle

5

and

7

can

be

accomplished

inch

OPERATION

The

either

sizes.

the

turntable

N. A.

Handling

as follows:

-

B.

MODEL

on

the

10

u/a"

these

400

left

reel

different

side

of

tape

type

or

supply

the

reels

is

smaller

on

this

the

N. A.

drive

to the

of the

II.

takeup

to

supply

III. which

through

and

7

and

Large

black

Small

B.

right

machine.

must

top

plastic

position

10 the

hand

tension

power

switch,

plate.

8,

1

N,

position

2

R.M.A.

The

turntable

1/2"

small

takeup

TAPE

arm,

POWER:

be

turned

The

respectively.

A.

reel

B.

and

-

place

centering

-

place

and

reels.

turntable

THREADING:

5,

to

operate

Power

on

which

9,

plate

top

10

i/a"

the

7 &

the

on

the

the keys

Attempting

must

the

is

to

energize

must

and

Reel

guide

5"

right

reel

Reels

reel

-

on

that

on

side

Place

-

have

to

will

seriously

Thread

be

moved

machine.

supplied

to

the

be

turned

electronics are

the

turntable after

has been

Place

the

keyed

takeup

not

been

use

the

tape as

into

position

the

top

motors,

on

to

Reel

Size

provided.

the

Reel

Size

turntable directly.

reel

provided

small

impair

indicated

plate

operate

will

M.

R. the

as

shown,

through switch,

Main

power

the

on

in

individually

Switch

positioning

Switch

handle

the

turntable

A.

reels

performance

Fig.

6.

in

is

supplied

electronics

fused

6

only

order

by

6

in

the

on

The

3,

IV.

V. erating

ization

VI. mode

The

selector

knob

attached,

while

recommended

is

FUSES:

SPEED

speed.

in

the

TAPE

selector

changing

taneous action

Top

Chassis Fuse

SWITCHES:

Switch

4

amplifiers.

MOTION:

switch

1

switch should

Hold the knob

its

position.

preference

in

of

all

necessary

Plate

and

Fuse

governs

The

the

be

securely

Rapid,

There

tape

PLAY

moved

to

slow

functions.

Model

7 8

the

motion

positive

2

1

are

motor,

buUei

firmly

between

action,

Amperes

Ampere

two

400

switches

and

is

controlled

2,

by

means

motion

This

Section

19

directly

the

thumb and

associated

corrects

of the

is

to

III

by

means

to

selector

insure

Page

equal

its

selector

forefinger

1

with

left.

simul

3-12-51

of

knob

op

a

end

new

they

come

will

the

hub

-

IMPORTANT

The

of

the

factory

are

usually

free.

wear

wheel’s

must

trip

reel

wound

If

flat

a

replacement.

be

removed

out

unless

looped

the

in

-

switch

reels

tape

the

will

the

tape

of

the

to

does not

rubber

with

tape

hub

capstan

Any

solvent

not

will

should

disengage

adhesive

disengage

freely

disengage

be

inamanner

idler

material

for

the

unwound

reel,

the

wheel

same

capstan idler

the

and

inspected,

such

that

the

which

accumulation

reason,

reel

they

drive

will

at

the

hub.

wiii

not

capstan

necessitate

on

All

as

the

first

switch, button

move

tape lector

tion.

mode,

will

when of

tape

tation

a

slack

left used

1.

depressing

be

at

must

switch

2,

merely

occur

CAU

using

remaining

of

loop.

3,

without

in

order

Play

1,

to

the

depressed

the

fast forward

completely

be

should

Stop.

return

automatically

TI

ON:

the

reel

FastFor

depressing

to

and

the

FORWARD

To

small

on

becomes

rapidly

Record,

PLAY

before

be

stop

the

Never

reel,

the

war

the

button,

position.

moving

spee;d

stopped

moved

the

tape

selector

if

the

stop

but

unwinding

so

great

d,

button, This

arrive

The

tape

2,

and then

It

is

the

selector

instead

before

firmly

and

of

at

starting

rapidly

motion,

tape

the

allow

Move

switch,

should

machine

the

reel

that

the

1,

break

tape

is

less

it

may

selector

is

atapoint within

is

set

important

the

while

near

to

fa?t

a

into

moving

switch

operating

in

to

it

to

the

or

run

than

not

switch,

forward

the

this

insure

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Model

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Ill

Page

3

2-16-51

can

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Model

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Section

III

Page

4

2-16-51

contains

are

respectively

to

right

playback

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posit

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Such

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to

Model

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Section

IV

Page

1

HEAD

ALIGNMENT

Remove

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Looking

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and

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to

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and

.A.LIGNMENT.

The

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with

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azi

be

the

Model

400

Section

IV

Page

2

HEAD

DEMAGNETIZATION

Occasionally

cal

fault

contact

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The ing

the

at

the

of

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Remove gradually.

netization

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off

be

pulled

Model

400

Section

IV

Page

3

ELECTRONIC

ALIGNMENT

The

factory

and

The

ing

electronics

necessary, quired

in

A the following below

15

inch

amplifiers are

thoroughly

following

alignment

however,

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maintenance.

standard

frequency

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pre-checked.

alignment

in

unless

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level.

1600

3200

6400 8000

9000

10000 11000 12000

14000

15000

set

on

procedure

field,

the

alterations

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recorded

1

Kc.

for level adjustment

15

Xc.

for

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Cycles

100 200 400

800

ii

tt

standardized

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15

at

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so

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15

inches

per

C.

LEVEL

position.

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TERMINATION

Slide

Set

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OF

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TAPE

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electronic assembly

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EQUALIZATION

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the

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to

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7

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2000

Page

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the

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into

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the

OUTPUT

VU

After

fashion

scale

switch.

and

of

Model

400

Section

V

Page

4

2-16-51

MODEL

400

-

MAINTENANCE

I.

is an

Lubrication.

induction

bearings for

age use holes

or

in

the

The

quires

the

The

and

will

not

The

light

machine

Foi]ow

the

motor.

II.

long

spection

worn

Brakes

service,

of the

through

motor

quiet

every

side

of

second

same

oiling

bail

require

mechanical

oil

the

however,

linings

may damage

operation

months

six

the

motor

bearings

attention,

only

at

same

.

The

for

rewind

motor,

is

schedule

in

linkage

three

lubrication

Brake

the

and

linings

is desirable

the

drive

and takeup.

which

when

using

synchronous.

described

the

idlers

should

points.

hoidback

surface

should

usage

may

as

system

is

10

drops

and

have

See

schedule

have

operation

of

employs

This

be

oiled

extremely

of

SAE

The

upper sleeve

above,

turntables are

occasional

Fig.

9.

with this

linings

are

to

be

of the

the

brake

two

motor

once

heavy.

20

high

replaced.

recorder

drum.

motors.

sleeve

has

a

year

for

Oil

motor

bearing

factory

lubrication

linkage as

grade

Periodic

One

aver

through

oil.

re

packed

with

felt.

After

in

with linings

brake

equivalent

the

drum.

but

should

The

1,

drum,

2,

3.

4.

5.

In

CAUTION:

Do

Remove

Spread

on

Place

Allow

an

be

linings

not

the

brake shoe,

emergency

replaced

are

remove

old

a

liberal

felt

cement

supplied

lining

carefully

to

any

as

soon

Be

brakes

amount

set

good

sure

by

the

but

and

scrape

of

in

position

30

minutes before

quality

as

‘po’.:fble

that

no

factory,

merely

Du

glue

shoe

Pont

and

felt

by

hold

may

factory

gets

cut

to

about

clean.

Household

release

using

be

on

the

size.

the

cut

linings.

working

1/4"

Cement

brake

the

to

To

away

recorder.

size

apply:

from

or

against

and

used,

surfaces,

Model

400

Section

VI

Page

1

III.

either

affected

rack

ening

shut

the

mount

spring

off

Takeup

horizontal

by

during

these

additional

5,

fast forward

Tension

position

conditions

tension

Fig.

9,

Arm:

or

rack

is

the

is

supplied

Excessive

or

rewind

takeup

The

mounted.

tension

by

tension

and

recorder

The

arm,

loosening

will

will cause

maybeusedin

only

Fig.

nut

cause

starting

adjustment

6. and

N

the

machine

difficulties.

For

tight

to

Model

400

Section

VI

Page

2

MODELS

400

and

401

pated

inally

transfer

grams

ance

and

NAB

the

Model

virtually

few

using ical

care

is

eliminated.

made:

At

that

designed,

of

without

with

the

published

reels.

Because

the

feet

of

the

large

adjustments

of,

and

the

there

tape

small

400

same

tape at

the

time

the

would

accommodations

from small

stringent

reels

specifications

of the

50

that

the

as

when the

the

hub

reel

on

necessary

flutter

To

accomplish

Model

be

such

quality

would

general

performance

of the

the

which

IMPORTANT

400

was

heavy demand

a

were

to

large

requirements.

not

on

the

demand

NAB

small

maintain

was

this,

side

induced

takeup

to

NOTICE

first

provided for

reels

come

reels

the

and

up

Model

for

when

are

reel.

all

at

the

by

following

introduced,

for

to

It

to

that

400

the

7"

using

employed,

This

times,

performair

the

-

7"

RMA

the

7"

record

realized

was

when

only

apply

reels,

the

7"

has been

for

in

e

smaller

modifications

it

was not

reels.

reels

and

reproduce

using

when

we

diameter

except

accomplished

doing

are

properly

reel

that

the

have

in this

to

for

so,

have

antici

As

allow

the

large

using

modified

will

the

position

been

orig

the

pro perform

reels,

the

be

last

by

crit

taken

been

removed

mounted

when

to

get out

over

using

adjust,

of

our

understood

OPERATORS

SEVEN-INCH

1.

The

2.

The

so

that

These

the

and

adjustment,

earlier

Because

that

SHOULD BE

pins

previously used for centering

from

the

centering

it

cannot

changes

smaller reels.

these

with

and

models.

of

the

small

the

RMS

REELS

right

hand

guide

be

removed

have made

changes,

the

performance

adjustmentp

reel

SO

INFORMED

ON

It

is

THE

turntable.

for

has

it

the

in

possible

also

is

most

NAB

the

reel

field.

to

made

unlikely

has undoubtedly been

not

mentioned

to

be

NOT

above,

used

TO

TAKEUP TURNTABLE

AMPEX

ELECTRIC

has been

employ

the

on

the

ATTEMPT

the

recorder

that

takeup

small

permanently

lighter

the

it

must

AT

CORPORATION

RMS

tape

much machine

improved

be

side,

TO

ANY

reels

simpler

clearly

SO

USE

have

tensions

should

ALL

THE

TIME.

4-1-51

REPLACEMENT

PARTS

LIST

5%

Ampex

Number

00-45 CO-53

00-59

00-45

CO-2

00-92

CO-fl CO-lOl

00-59

CQ-43 CO-55

CO-lZ

00-47

CO-56

CO-44

C0-97

C0-53

00-59 00-14

C0-42

00-54

00-5?

C0-44 00-46

C0-59

GO-

CO-Si

CO-44

00-89 CQ-44

CO-S

C0-9l C0-90 00-8

00-57

Schematic

Ref.

C-lOl C C-103 C-104

C-lOS C-l06

C-107

C-lOB

0-109 C-lb

C-ill C-liZ

C-li3

C-l14

C-i15 C-U6

C-l17

C-US

C-1l9

C-1Z0

C-lzl

C-lZZ C-123

0424

C-125

0-126

0-127

L-l28

0-129 0-130

C-l3l C0-89 C-l32 C0-7

C-l33

C-134 .1 C-l35 C-136

C-l37

C C-ZOl

-102

.138

No.

25

4

25

15

0005

0001

1

25

05

10

.005

1

MFD.

16

.1 .1

.1

4 25

.01

.

01

4

25

.1

.

5

25 1000

20

1

0004 002

.

0004

.

0005

.001

.

0002

.0025

20

MFD,

MFDI

MFD,

MFD--PADDER

MFD,

MFD, MFD,

MFD,

MFD

MFD,

MFD

MFD,

MFD.

MFD,

MFD

MFD, MFD

MFD,

150

400

450

400

150

400 400

200

150

450

400

V.

25

V.

15 V.

400

PADDER

25

V.

400

500 V.

V,

25

V.

300

400

V.

25

V.

400

25

V.

15

450

SILVER

P

SILVER

450

500

V.

V,

V. V.

V.

V

V.

500

ADDER

500

V.

Description

METALIZED

V,

ELECTROLYTIC

V.

METALIZED

V.

MICA

CONDENSER

PAPER

CONDENSER

PAPER

CONDENSER

5%

+

-

CONDENSER

METALIZ}WPAPER CONDENSER

ELECTROLYTIC

METALIZE-D

V.

ELEC

V.

TROL

MICA

METALIZED

ELECTROLYTIC

METALIZED METALIZED

METALIZED

ELECTROLYTIC

V.

SILVER

METALIZED

ELECTROLYTIC

METALIZEIY

METALIZED

ELECTROJ

V

CAN

ELEC.

TUBULAR

METALIZED

MICA

METALIZED

V.

SILVER

CONDENSER

V.

MICA

TUBULAR

CONDENSER-F

MICA

"TTC

ELECTROLYTIC

CONDENSER

PAPER

YTIC

PAPER

PAPER PAPER

PAPER

±

PAPER

LtOLYTIC

PAPER

MICA

CONDZNSER

CONDENSER

5%

CCNDENSER

CONDENSER

5%

CONDENSER

+

+5%

+

CONDENSER

CONDENSER +

+

t

CONDENSER

5%

-

5%

Stock

66

Note:

ORDER

PARTS

BY

AMPEX

STOCK NUMBER

Model

400

Section

ONLY!

VII

Fage

1

Schematic

Ref.

No.

Description

Ampex

Number

Stock

C-Z0l

0-301

C-302

0-303

J-1015

J-102S

J-1035

J-lO4P

J-105S

J-106S

J-1075

J-201P

J-3OlP

J-3025

J-303P J-30.

J-305P

K-lOl

L-lOl

L-20l

L-202

R-lOl R-lOZ

R-103

R-104 R-105

R-107

R-lOS

R-l09 R-l10

R-lll

R-112

R-1l3

R-ll4

R-115

R-1l6 R-117

R-U8

R-1l9 R-bZO

R-121

45.0

V.

a

MFfl,

DRIVE

TURNTABLE

.1

CANNON

MFD,

MOTOR

600

fl-3-U

RECEPTACLE

-OPEN

CANNON

S

6

4

8

TURNTABLE

TURNTABLE-MOTOR SOCKET

DRIVE-

DR.IVL

TOP

3PDT

20

FILTER FILTER

56,

47

56,

100,

1,200 100,

100,000

2.200 47,

1,000,000 100,

39,000

100,

2,200 47,000

470, 2,200

470

22,000 47,

CIRCUIT

CONTACT

CONTACT CONTACT

CONTACT

MOTOR

PLATE

RELAY

MH

CHOKE

000

OHM,

OHM

000

OHM

000

OHM,

000

OHM

OHM-

000

OHM,

000

OHM.

OHM,

000

OHM,

000

OHM,

000

OHM,

CL-3-14

CHOKE CHOKE

1

WATT,

COMPOSITION RESISTOR

OHM

OHM,

1

TUBULSR

CONDENSER,

MOTOR

V.

TUBULAR CONDENSER

CONDENSER,

CONNECTOR,

-

2

CONTACT

JACK

CONNECTOR

CONNECTOR, CONNECTOR,

CONNECTOR.

CINCH

MOTOR

HARNESS

1

WATT,

1

WIREWOUND

1

POTENTIOMETER

1

WATT,

1

WATT,

1

WATT,

2 I

PLUG

SOCKET

WITH

PLUGS

WATT,

1

WATT,

WATT. COMPOS

WATT,

WATT

WALT, COMPOSITION

COMPOSITION RESISTOR

COMPOSITION

COMPOSITION RESISTOR

WELWYN

COMPOSITION RESISTOR

COMPOSITION

COMPOS!TON

COMPOSITION-

COMPOSITION

COMPOSIT

COMPOS!T,JN

CO1-Ai-OS.!Tr’ONRE&STOR

CONDENSER

6

MFD-.

AIR

FOR

DEVICES

Mn,

5

DEVICES

LOCKING

WITH

CHASSIS

CHASSIS MOUNT

CHASSIS

-WJTH-SHELL

WITH

SHELL

WITH

POTENTQMETER

GROUNDING-SPRING

MOUNT

SHELL

RESISTOR

RES’STOR

SLOTTED

-ON

RESISTOR

fli-SISTOR

:JN

RESISTOR

RESISTOR.

RESISTOR

E.AS-TSRN

--MOTOR

FOR

MOTOR

RESISTOR

SHAFT

LAS-TERN

+

5%

+

5%

00-57

00-109

00-1.1.0

00-33

RF-8

RF-10

JA-3

PL-4

RF-17

RF-16

RF-l5

PL-2l

PL-19

RF-13

PL-16

RF-l4

PL-18

RL-6

CH-8

A-liSS

A-1155

RE-fl RE--?63

RE-fl

RE-26 RE-30

RE-ZOS

RE-227

RE-7

RE-22

RE-48

RE-22i

RE-44

RE-26 RE-7 RE-22

RE-31 RE-7

RE-Z RE-17b

RE-22

Note:

ORDER

PARTS

BY

AMPEX

STOC}C

M.

MEER

1

400

Section

ONLY

VII

Page

2

Schematic

ReLNo.

Description

Ampex

Number

Stock

R-122.

R-123

R-l24

R-125

R-]26

It-liE

R-129

R-130 R-131 R-132.

R-133 R-134

R-135 R-136

R-137 R-138

R-139

R-140 R-141 R-142

R-143 R-144

R-145

R-146 R-147

1,000,000

50., 470,

15,000

JJ0,flO.0

1,0.0,.000

330,0110

.2,20.0

1,000,0.0.0 .21,000 .22,000

1,000,000

330,

2,700

5.60 1,000,000

1,000,000 1,

000, 100, 10,

1,

000,

2,200

560

100

47, R-148 47, R-149

R-150

R-151

R-152

R-153

R-154

R-30l

SR-201

5-101 5-102

5-103

S-104 S-lOS

5-106

40,000

500

7

OHM8

3600

560

47,

150

SELENIUM

3P3T

3PZT

PUSHBUTTON

SPST

3P4T

SPST

5-301 SPST S-302

DPDT

OHM,

000

POTENTIOMETER,

000

OEM,

OHM,

1PM,

OEM,

CI-IM,,.POTENTIOMETER,

OHM,

0-0.0

OHM,

1

WATT1

I

WATT.,

10

WATT, RESISTOR

1

WATT,

I

WATT,

1

WATT, WELWYN

1

WATT,

1

WATT,

2

WATT, COMPOSITION

1

WATT, COMPOSITION

1

WATT,

COMPOSITION.RESISTOR

COMPOSITION

tOMPOSIT1ON

WELWYN

COS’IPOSJTION

WELWYN

COMPOSITION RESISTOR

OHM.,1WATT, COMPOSITION

OHM,

000

OHM,

000 000

OHM,

000

OHM,

SELECTOR

1

OHM, OHM,

000

OHM,

000

OHM,

1

OHM,

OHM, OHM,

10

1

WATT,

1

OHM,

50

TOGGLE

WATT, COMPOSITION RESISTOR

1

WATT,

COMPOSITION

POTENTIOMETER,.

POTENTIOMETER,

1

WATT9

2

WATT,

1

WATTS

WATT,

1

WATT,

1

WATT, COMPOSITION RESISTOR

1

WATT, COMPOSITION

COMPOSITION RESISTOR

COMPOSITION

COMPOSITION RESISTOR

COMP0SITIO1RESISTOR

COMPOSITION

WIREWOUND

WATT,

1

WATT,

1

WATT,

WATTS

RECTIFIER

-

SWITCH

TOP

SPEED

WIREWOUND

WELWYN

COMPOSITION

ADJUSTABLE

-

SWITCH

NORMALLY

-

SWITCH

-

PLATE

CHANGE

FULL

BAT

RE-32

RE

SLOTTED

SHAFT

RESISTOR

-266

RE-31

RE-fl

RESISTOR

RRSTSTOR

RESISTOR

SLOTTED

RESISTOR

SHAFT

RESISTOR

RE-26 RE-Zil

RE-.209

RE7 RE-Zil

RE-24C

RE--171 RE-32 RE-30

RESISTOR

RE-8 RE-3

RESISTOR

SLOTTED SLOTTED

SHAFT SHAFT

RE-32 RE-232

RE-fiLl

RE-26

RESISTOR

RE

-168

RE-32 RE-7

RESISTOR

+5%

RE-3

RE

--38

RE-LlZ

RESISTOR

RE-fl

POTENTIOMETER RE-278

RE-277

RE-257

RE-fl-B RE-3

RE-22

RE-2-59

SR-3 SW-?

SW-B

SW-il

SW-13

SW-9 SW-9

SW-S

RESISTOR

IN

RESISTOR

WAVE

RESISTOR

2-

PARALLEL

RESISTOR

14

+1%

-

ADJUSTABLE

OHM

.

OPEN

HANDLE SW-9

HANDLE

POWER

SWITCH

Note:

ORDER

PARTS

BY

AMPEX

STOCK

Model

400

NUMBER

Section

ONLY!

VII

Page

3

Z-16-51

Sclienatic

Ref.

Nl

Description

Ampex

Number

Stock

S-303

S-304

S-305

£25.1 SPDT

SPLDTSPECLLL

5-306 DPDT 5-307

T-10l T-102 T-103

T-201

V-101

V-102

V-l03 V-104

V-l05 V-l06

V-107

.DPDT

lv[ICROPEONE

OUTPUT ERASE

POWER

12537 VACUUM 125J7

12537 £C5

VR

12537

V-lOS 6C5

V-109

V-201

6SN7-GT

5Y3-G

MICROSWITCH

WAFER

T.RANSORMER

TRANSFORMER

VACUUM

lSO/OD3

VACUUM

-

TURNTABLE POWER

-

POWER

WAFER

-

RECORD

-

TURNTABLE

INPUT

-.REELSJ.ZESWLTCH

INTERLOCK

TRANSFORMER

TUBE

OR

TUBE

635

-TUBE

SELECTED

OR

6J5

MISCELLANEOUS

BOOST

MOTOR

PARTS

SWITCH

REVERSING

SWITCH

-

SW-2 SW-l7

A-982

SW-15

SW-16

B-1153 B-l154

A-loll

B-883

TU-1I

TU-li.

TU-ll TU-3

TU-2

TU-12

TU-U

TU-3 TU-13

TU-14

CAPSTAN HEAD HEAD

LINING

METER

MOTOR

RECORD REEL TAPE TAPE

TAPE TURNTABLE

TURREt INPUT

OUTPUT

Note:

ASSEMBLY

-

ADAPTER

-

GUIDE GUIDE

CONNECTOR

ORDER

IDLER

BRAKE

4"

-

DRIVE

-

VU

REWIND

INDICATOR

GUIDE

-

SPACER

-

SHIM

PAD

SOCKETS

CONNECTOR

PARTS

ASSEMBLY

-

1/2

-

FULL

SHOE

SPECIAL

-

TAKEUP

NEON

-

TURNTABLE

MODIFIED

CANNON

BY

AMPEX

TRACK

POST

MODEL

LIGHT

MOUNTING

XL-3-l2

XL-3-ll

STOCK

400

401

XL-3-12SC

OR

XL-3-llSC

OR

NUMBER ONLY!

A-99

W-475--4

A-962

ME-2

B B-

DL-4 A-976

A-257 A-922 A-923 A-958

A-1208

PL-33

RF-38

‘93 .Y.

Model

400

Section

VII

Page

4

2-16-51

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