RCA 73-B Series, 73-B MI-11825, 73-B MI-11826 Instructions Manual

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BROADCAST

INSTRUCTIONS

EQUIPMENT

Type

73-B

Prolessional Recorder

(Ml-11825) (Ml-11826)

RADIO RCA

IN

0

Pl'II~

...

VICTOR

A •

.

■

U .

CORPORATIOn

v1s1on

0 1

OF

AffiERICA

CAmoen,

n.J

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www.SteamPoweredRadio.Com

Figure 1-Type

73-8

Professiono/ Recorder

www.SteamPoweredRadio.Com

1

DESCRIPTION

Appficatio

The

signed

33¼

applications

in

large

highly

is

programs

ing hearsals, auditions

■

r

■

T

The

diameter

inches rubber

base

turntable

the any When

without

down

rubber

alongside

pressed,

Turatable Drive

The

motors coupled

■

Type

RCA

make

to

78 revolutions

or

numbers

suitable

for

table

turntable

will

and

diameter

in

on

mat

may

and

a

three drive holes

of

one

desired

is

it

drive

that

so

. A plunger-release

mat

the

drive

the

turntable

high-quality disc recordings

for

of

the

be

drive

holes, it

drive

73-B Professional Recorder

may

It

minute

per

preparing

records

for

of

can

broadcasting stations

use on

and

future

similar

recorder is 17½ inches

the

accommodate

¾-inch

and

turntable

easily cleaned.

mounted

is

make

to

drive

this

below

be

will

and

,

comes

is rim-driven

wheels.

drive

to

.

masters

made.

be

from

The

in

broadcasts,

applications.

blanks

up

thick. A removable

provides a

Near

in

use

button

when

back

by

good

the

over

record blank.

the

record

of

may

surface

the

is

this

position.

into

~ncbronous

two Both

which

be

motors

de-

is

either

at

used

be

which

recorder

record-

re-

for

in

¼

18

to

record

center

of

6u

blanks

pressed

the

of

mounted

button

are

controlled

switch

motor automatically is applied

bringing

rubber

Feed

The

bead

it

shock-mounted

Screw

feed screw is designed so

carriage

inside-out recordings

feed-screw

The

system between

Mounted

dle.

friction

a

is

feed screw.

the

of

down

and

up

by means

This

the

on the

outside-

top

the

fr

. direction

the

setting

om

is

housing and scale cates

and

at

wheel

wise to facilitate adjustment to

per

es

lin

of

wheel is adjusted at

in

the

against eng

pressure

is

which

ON-OFF

one

by

the

When

.

■

a

may

d

to

Drive

be

quickly

without

drive

the

drive

the

on

which

wheel

The

the

over

on

knob

a

of

adjustment selects

cut.

of

ouuide

in

of

the

in

of

lines

of

recordings. A release lever mounted

housing

the

ange

fl

s

A

ch.

the

sition (

po

aged

lever

the

to

a stop.

from

is

rim

The

the

turned

OFF, a

the

of motors motor

that

ouujde-in

either

for

used

changing

a pulley-and-belt shaft shaft

of

and

above

turntable

consistS

drives a flange

friction wheel may

diameter

entire

the

An

the

per

outside

drive

of

recording

the

muminated

shaft

both

ch for

in

housing indi-

disengages

turned

when

des

the

provide

to

the clockwise

to

pring

factory

flange

attached

when

turned

the

of

counterclock-

operates

a

brake

turntable,

doubly

are

.

board

recorder•

or

feed screws.

spin-

turntable

end

the

on

moved

be

flange

the

drive-shaft

pitch

pointer

and

inside-out

friction

the

number

ed

ir

friction

the

proper

the

release lever

).

Power Supply Required

l 2S volts

to

lOS

cycles

60

cycles (

SO Turntable-drive

Lamps . . . . . . . . . . . . • . . . . . . . . . . S

Pilot

Total

Spinllin1

-11825 )

(MI

-1182

Ml

motor

6)

motors

hen

(w

. . • . . • . . . . . . . . 8S watts

operatin1)

Turntable Speeds

33¾

or

78

rpm

(±½%

)

Turntable Diameter

up

blanks

for

(

ches

in

17½ ¾I

r

■

T

0.2% 0

0.0

0.14% (

.4%

inch

-

table

■

7%

)

thick

Speed Re9ulatlon

)

peak

to

peak

(

(peak

rms)

(

rms

)

to

peak)

at

78

331

rpm

,~

at at

rpm

18¼-inch di

to

rpm

78

rpm

33¼

TECHNICAL

90

4S

1

ameter

(wows)

watts

and

DATA

Recordln9 Pitch

variable

ly

(a )

Depth

b)

(

Depth

ote:

N

ous provided

ts

of

or

ubi,ul

Wilh

31¾ inches

-22¼

- 280

ut

ho

Wit

0 inches

-2 0 inches

-3 0½

-2

JB-243

See

data.

Feed

outside-

d

■

a

inches

pounds

~•bir,•I

in

Continu deten

Direction

Inside-out

Dimensions

Heisht-20 Width-

Weisht

Heigbt Width

technical

eps

st

in

Wel9H

ches

for

40

152 lines

to

96

8 lines

of

-11850-C Recorder

Ml

per

inch

with

ch

in

.

Head

IB-24383

www.SteamPoweredRadio.Com

2

Spiralling

A separate self-braking screw to motor a pulley-and-belt system. A non-locking switch ate inch table

duced

provide

is coupled

near

this motor.

when

the

speed

of

in

proportion

the

drive-shaft

The

turntable

33 ½

start

to

motor

and

the

feed-screw

housing

spiralling

speed is 78

rpm

the

to

the

speed change.

overdrives

finishing spirals.

is

pitch

is six lines

rpm.

spiralHng

Carriage

The

recorder-head carriage is free

the

feed-screw

with

the

raised

or

is raised from automatically disengages arm

automatically engages

leased

the justS

the tion, the the record by

from

The

center

angle

the

The

stylus-lowering lever is used

stylus.

surface

tube

until

feed-screw

non-cutting position.

the

of

the

depth

When

feed-nut

of

operating

tube

the

cutting

rest position.

thumb

the

nut

cut.

The

of

the

cutter.

the

carriage is

arm

is engaged,

record, ready

this lever.

a latch locks

when

position, from

when

on

left-hand

the

carriage is

When

the

carriage

in

the

and

to

be

the

to

feed screw;

thumb

to

lowered

Recorder Head

The

compensator, transformer, series resistor, high-off-low switch, are recommended Recorder Head a complete description the

instruction

Calibrated

Four for 96, 104, 112, 120, 128, 136, 144 inch:

One One One One

Scales

timing

for

inside-out for inside-out for outside-in for

outside-in

for

are

book

scales

pilot

lamp

use

all

built of

the

(IB-24340)

are

provided, each

recording recording recording recording

and

receptacle

with

the

into

the

Ml-11850-C,

shipped

and

at

33 ½

at

78

at

33 ½

at

78

the

feed

This

drive

shaft

push-button

used

to

oper-

For a turn-

pitch

is

rotate

the

feed-nut

carriage

raise

standby posi-

stylus is near

recorder.

152 lines

rpm,

rpm.

about

the

carriage

in

carriage

arm

is re-

controls

nut

or

lower

to

which

MI-11850-C

refer

with

it.

calibrated

rpm,

by

per

re-

the

ad-

the

For

to

per

comparison known proper made.

The record surface. A small justable on-off toggle microscope

of

the

dimensions thus

standards for

interpretation,

microscope may

arm

to

illuminate

switch

arm.

for

Transformer

A transformer

plies

the

power

On

some

of

for this purpose.

the

mounted

for

the

units

INSTALLATION

Unpacking

Take

extreme equipment, assembly. entering

the

Connections

Make

all

board

at

the

power

of diagrams ures 3

the

leads recorder.

and

Mounting

Mount Install machine screws turntable

imum allow assembly. sions on plane.

the

When

clearance

for floating

of

the

skid

the

Refer

care

in

with

special

Prevent

audio

for

4).

the

over

assembly

any

turntable-spindle bearing.

connections

front

of

to

the

TB-1

Refer

the

proper

recorder

cabinet

recorder.

and

the

spindle

around

of

to

figure 2

over

is

the

are

obtained

recording

superior

be

lamp

this

on

pilot

two

transformers

unpacking

regard

dirt

or

the

recorder.

terminal

to

the

terminals

on a sturdy

the

washers provided. Place

carefully.

not

used, allow

the

sides

shock

for

Be

sure

exactly

work,

recordings.

moved over

is

mounted

the

record grooves.

lamp

is

mounted

the

recorder base sup-

lamps

and

handling

to

the

foreign

to

the

TB-2 terminal

Connect

board

schematic

to

be

recorder

¼-inch

of

the

mounting

the

mounting

the

four

wood

in

a level

and

may

the

on

the

heater

a.re

supplied

microscope

matter

the

at

the

and

wiring

used (fig-

flat surface.

using

recorder on

the skid

dimen-

blocks

horizontal

with with

be

entire

ad-

An

on

the

kit.

the

from

a-c

rear

two

the

min-

to

I

Microscope

A high-quality 36-power microscope

arm

ciated side so

that object viewed. groove and wall

assembly is

the

turntable. The

each division represents 0.001 ·

This

widths

with

an

provided

microscope scale is calibrated

permits

of

for

mounting

inch

on

aetual measurement

the

record face,

and

along-

asso-

the

of

by

Installing Microscope

Mount

corder

Pull through threaded ondary

the

base

by

the

two

the

shaft,

winding

microscope-arm assembly

means

of

leads

opening

and

connect

terminals

the

from

on

threaded

the

microscope

the

recorder

these leads

of

transformer

shaft

on

the

provided.

lamp

near

to

the

T-1 as

re-

the

sec-

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5

shown units to

on

having

the

transformer

the

wiring

two

diagram,

figure 4.

transformers, connect these leads

terminals

which

lamps.)

Calibrated

To

install a calibrated scale, place

the

scale

end

bracket, pressing

align

the

in

the

low

the

to

secure

to

press end

first.

The

easily

recording.

required, continue certain

agrees

of

lines

Refer

bead

used

various numbers

(front

right

pivots

the

scales

set

start to

that

with

per

to

Scale

view)

over

the

end

of

the

support

to

engage

and

desired calibration.

left

are

the

For

cut

the

inch.

the

for

(front

indicator

example,

the

until

scale

speed,

instruction

the

view)

marked

for

if

cut

with the

showing

direction

\

approximate

of

lines

the

scale

and

scale

with release the

the

scale.

To

and

so

that

the

required

a five-minute

the

indicator

under of

book

playing

per

inch

speeds.

MountinCJ

Mount

cradle

thumb the

recorder-head leads schematic diagram, figure receptacle

Automatic

A

to

mount izer. but

may

of

Recorder

the

MI-11850-C Recorder

beneath

the

screws furnished

on

the

RecordinCJ

slit

tube

above

an

MI-11100 Automatic

This

equalizer

be

purchased as

Head

carriage

with

to

the

3.

Insert

casting

the plug

recorder base.

Equalizer

the

feed-screw

is

not

supplied

an

accessory.

pensates for high-frequency loss as

the

center right tion the

terminal instruction plete

Advance Ball

To

cuntely,

of

the

record. A

end

of

the

rear

support

with

the

equalizer.

board

book

on

Wiring

is already installed.

the

equalizer

installation instructions.

Kit

control

the

depth

an

MI-11851 Advance

of

plug

tube

the

recording

is

from

Ball

(On

those

supply

pivot

Rotate

the

left

pivot

to

the

pressure

the

end

in

the

pivot

the

other

of

the

left;

to

al-

scale

remove a scale,

lift

it

out,

right

the

operator

recording

set

reaches 0.

the

feed,

and

on

the

rime for

and

Head

using

may

length

of

is

at 5 and

Make

indicator

number

recording

the

turntable

on

the

two

recorder. Connect

as

shown

the

plug

tube Recording with

This the mounted

ready

for

Kit

on

into

is designed

Equal-

the

recorder,

unit

com-

cutter

nears

in

for

connec-

this

plug

Refer

to

further

com-

groove

is recom-

the the

the

to

the

ac-

mended when are

Suction Nozzle

nozzle

nozzle may Equipment, pling shavings outside-in of ment may

Pickup and

base (not base is already connected scheruatic recorder base covers the plete tion

Recommended Associated Equipment

preceding used

for use

cutting

with

wax

the

MI-11850-C Recorder

discs

or

when

vibration

serious.

for

RemovinCJ

Fastened

the

be

A removable

to

which

Kit,

MI-4923.

is

especially useful

to

stylus

and

is

not

ordered

for

mounting

supplied

the

recorder-head

terminates just above

be

connected

MI-4922,

by

This

prevent

shavings

impairing

included as a

separately.

Arm

plate

is

provided

an

MI-11899

with

recorder).

to

diagram,

arm

rest furnished

figure

an

opening

with

installation instructions,

book

on

the

pickup.

In

addition

with

1. Orthacoustic Equalizer, MI-4916

2.

Sapphire

3.

Sapphire

to

the

equipment paragraphs, the

recorder:

the

Stylus (90-degrees), MI-4878-C Stylus (70-degrees), MI-4842

Record Shavin91

carriage

the

to

Recording means method

of

Hose

for

when

recording from

from

piling

its operation.

part

of

the

on

Pickup

A receptacle

the

terminal board. See

3. A plug to

be

the

MI-11899.

refer

to

mentioned

following

removing

recorder,

the

button

used

units may

4. Steel Stylus, MI-4879-A

5.

Amplifier

6. Amplifier

7. Standard

(Type (Type

Cutter

82-Cl), BA-4A),

Head,

MI-11853

MI-11209-B

MI-11223

OPERATION

RecordinCJ

For cedure struction

Controls Provided

See

controls.

Routine Operation

After

Procedure

detailed instructions

including

book

figure 5 for

all connections

microscope use,

on

the

recorder

the

location

have

covering

head

of

been

made

recording

refer

(IB-24340).

the

Head

problems

is a suction

record.

This

Suction

and

Cou-

up

ahead

This

equip-

recorder

and

Ann

on t.be

on

to

mount

For

com-

the

instruc-

in

pro-

to

the

recording

to

external

the

but

the

be

in-

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4-Wir;,.g

Diagram

ol

Ml-11825

and

Ml-11826

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7

'

equipment plied

1.

plunger-release table up

into

2.

that

record-drive

3.

should

for

form

vendor.

4.

5.

The

in

the

up

or tween heater-indicator

HI

or

tical), lamp

6.

7.

speed position.

8.

disengaged

the

lines-per-inch

as

shown

Put

the

clockwise) .

9.

tion knob

10.

11.

sition, press

riage

over lever, lower

12.

the

in

accordance

with

them,

With

platter

one

HI

two

the

allowing

position.

Place a recording

of

the

pin.

Be

sure

be

reground

and

Turn

ON

Set

the

heater

position

recorder-head

for

operation

40-degrees

LOW.

the

heater

is off.

Turn

on

Set

the

speed-shift

With

the position ( turned

by

the

release lever

Rotate to

and

horizontally

the

agree

lines-per-inch

Turn

ON

With

tfie

the

record. By means

the

Set

the

knobs

with

follow

turntable

button

holes

the

stylus is satisfactory

cutting

the

short-circuits

lamp

In

the

circuit

the

feed-screw

control

indicator

calibrated

with

the

recorder

feed-nut lever

stylus

correct

atop

the

platter

near

the

record-drive

blank

in

the

or

discarded).

edge

upon

master

and

microscope

until

switch

heater

in

ambient

65-degrees

is

on

off

position

is

control

knob

in

the

setting

setting.

motor.

it

to

the

depth

the

carriage.

lamp

to

circuit

when

not

drive

on engaged

scale

head

is

procedure

counterclockwise),

of

the

instructions sup-

stationary, press

center

on record fits

the

of

the

turntable

Check

receipt

switch.

desired position.

the

7-ohm resistor

for

quick

temperatures

Fahrenheit.

this

switch

(switch

energized,

lamp

switch.

knob

to

release

to

the

desired

the

illuminated

position

to

the

proper

of

the

in

the

and

slide

in

the

desired

the

stylus-lowering

record.

and

angle

below:

the

turn

to

come

over

the

(worn

lever

standby

styli

all

styli

from

the

warm-

The

is

arm

ver-

and

this

the

desired

in

setting

scale.

(turned

posi-

speed-shift

the

position

of

cut

so

be-

on

the

set

po-

car-

by

railing tinuously the

stylus-lowering lever

from locks automatically

firmly

switch.

for

necessary spirals

15.

At

the

record;

16.

Turn to

stop

CAUTION:

used,

c11re

lever

and.

dri

ve lever is

cou"'ercloclewise).

Four

wrenches recorder given

in

for the

Tarntable-Drlve Motors

Two

oil

holes

(one

in

each motor ming drops Each

to holes, first remove

½

be of

bearings. Use a

machine

in

each

oil

bole

keep

out

-inch

6

the

(maximum)

most

easily accomplished

recorder.

Turntable Spindle and Spindle Bearln9

To

lubricate

use

petroleum

Corria9e Drive-Shaft Bearln9s

To

lubricate

use a non-fluid

cant

Co.

Type

183440-11).

NOTE

:

Do

or

the

feed

dirty, wipe

lint.

Do

not

use

the

spiralling

any

length

conclusion

then

OFF

the

turntable. Remove

When

should

of

on

the

of

which

raise

in

the

motor, and

the

be

laleen

time

record.

the

recording, raise the

lifts

the

rest position.

ruorder

lo

see

switches are OFF and.

in

the

disengaged

MAINTENANCE

are

provided

servicing.

following

end

oil,

oil

is covered

dirt

the

jelly.

oil

K-00

not

screw

them

are

provided

bell)

such hole

and

dust.

the

turntable

the

such

Special

lubricate

.

If

off

Lubrication

paragraphs.

for

the

light

high-grade, non-gum-

as SAE-10.

at

intervals

with a ball

To

gain

cabinet

spout.

carriage

with

from

as

"N.

Grapbited"

the

these

a

dean

This

spindle

cauiage

pam

in

Use

drive-shaft

Y.

motor

other

than

to

the

recorder head

carriage

press

that

the

until

the

record.

is

nol

being

the

motor

feed-screw

lever

position ( turned

to

disassemble

instructions

each

drive

motor

lubrication

Put

of

and

access

an

lubrication

the

front

and

support

become

dry

rag

six

one

spring

oiler

and

N.

(RCA

dusty

frtt

of

or

seven

month.

to

the with

and

bearing,

bearings

J.

Lubri-

tube

from

con-

cut

it

the

are

the

seal

oil

a

may

rear

dwg.

or

13.

Keep

the

throughout

14.

separating

the

To

cut a spiral

portions

input

signal

recording.

for

of a recording,

at

the

proper

beginning,

press

strength

ending,

the

or

spi-

Replacement Ports

The

following

identification

der

from

"

parts

when

RCA

RepltUemn11 Paris

list

ordering

is included

replacement parts.

to

provide

Deparlmffll,

Or-

www.SteamPoweredRadio.Com

8

O£PTH

OFCVT

CONTROi.

ANGLE

CONTROL

OF

CUT

FEEO

DISENGAGING

LEVER

LATCH

RECOROER

I.Cl'WERING

1---...--

I

NUT

ANO

HEAD

LEVER

•

44010

LOIID

MOUNTING

41230

Jt317 COMPtNSATOII

MOTO,.

80A"0

figure

5-llecording

Control,

62041

ACC£PTACLt

492$3 Ml-II

49271

M!-11829/

---~

-=--=--=--=-~==~

412.4S

BELT

e2s\.PUULY

Figur

e 6-

Main

AnemlJy

www.SteamPoweredRadio.Com

702711

ARM

49282

49277

M1-11112e1

492"'41-111129

MOTOR

492~

MOUNTING

4921!>

49275

110~

52400

SCREW

GAPM:ITOA

9

GROMMET

TRANSFORMER

49211& SCREW

49281

LEVER

49273

0

SWITCH

492S7

49278 49260

PULLEY

(1,11•11826) (l,ll·ll82S)

PULLEY

492~

492&3 S2S67

MOUNT

ING

BRAKE RESISTOR

•

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49241

SOCKET

LAMP

I

',-,$

I

I l

'jI-

ff

=-=---jl

I I '

~

--

-

-t

1-

7

I I

I l I '

•

4gI90

END

WHEEL

Of COVE.

RE.MOVED

R

43221

49230 SHAFT

49232

SPRING

49158

PULLEY

l ! i ,j

I I I I

I . I

49192

COLLAR

43217

49240

RACK GEAR

53233

4

3220

53849

PULLEY

Figure

8- Recorder-Head Drive Aueml:Jy

49191

43238

49194

HOUSING

BALL

COLLAR

I

www.SteamPoweredRadio.Com

11

C11mden,

and parts size

interchangeable

Refer

each

New

Jersey,"

"Description"

supplied

from

the

may

original

with

to

figures 6

part.

LIST

D•smption

Turntable Assembly

Pad

,

rubber Pin, record-l Pin, record-latch release;

Spring, Spring, Turntable,

Ball,

Bearing,

B@aring,

Cup, Pulley, spindle; wi Spindle

atch

record-latch record-latch release

with

rwo

Spindle A

spindle-thrust

spindle

spind

le

thrust-ball

spindle

thrust-beating

th 2 set

of

the

be

parts

them.

through

OF

dowel

giving

parts

slightly

but will

PARTS

with

two

pins

sse

suppo

support;

screws

the

"Stock

wanted.

different

13

for

washers

mbly

rt

with

Number"

Replacement

in

form

be

complete

the location

Sloe/,

49229 49227 432 43208 43210 49228

43237 49234

43242

nut

43243 49236

49235

11

or

ly

of

No

49234

492.35

49236

432.37

432.42

43243

BEARING

~PINOI.E

PULLEY

BALL

BEARING

CUP

Belt, feed-screw Belt,

spiralling

Board,

spiralling-drive

Capacitor, 1.75 mf,

Clamp,

Mounting,

capacitor Compensator Flange, Motor,

Plug, Pl Pulley,

Pulley,

Receptacle, Receptacle,

pickup

spiralling

recorder

ug

button,

spiralling

( MI-11825)

spiralling

(Ml-11826)

drive

receptacle

Lord

bead

for

pickup

recorder

drive

pickup-arm

figure 9-TurntalJe Aueml:Jy

Ma

in A

motor

50 v (C3)

drive

(J-

l)

motor;

arm

head

ssembly

(M-3)

rest

with

(J-6)

(J-2)

set

screw

49245

.

49245 49239

53432

91577

19317 53080 49238 44090

52500 70407

49253

49276 53082 52401

Figure

D•seript

Screw,

hex Spring, strap, Switch,

Arm, Arm, Arm,

Br

ake

Bushing, Capacitor, 1.75 mf, Cover, Cover, Grommet, Knob, Lamp, heater

equivalent (A-3) Lever, Lever, Lever, Motor, 50 Motor, 60

Mounting,

ion

pivot,

for

nut

for

spiralling

brake

idler

pulley

speed-shift

assembly

fo

r leads

front,

for

rear,

for

motor

transformer

speed-shift

indicator,

for

front idl

for

rea!

idler

on

and

off

cycle, Ml-11826 ( M-1, M-2)

cycle., MI-11825 (M-1, M-2)

Lord,

JO-Spindle

feed•screw drive; with

mounting

motor

( S-

Ba

se Assembly

330

volt

motor

and

support

Mazda

er

pulley

for

motors

pickup

3)

(C-

drive

drive;

,U,emhly

recepcacle

1,

C2)

with

5 l

or

brace

S10,lt

49247

53081

43173

49264 70278 43290 49263 49268 49275 49243 49242

16058

49274

11765 49258 49272 4926 49277 49255

49256

No.

1

www.SteamPoweredRadio.Com

12

..

492

49218

492

1$ MICR

OSCOPt

ARM

19 SOCl<£T

P-n335

t

,

~

49177

49175

49185

49203

49199

49196 COV

49174

SPRING

SH

SPRING

CARRIAGE

ARM

SPRING

AF

ER

T

_ _

Figure

......,.

11-Microecope

and

Ann AuemlJy

49173

49172

49171 FEED

49168

49170

49169 49189

SPRING

STUD

PLATE

ARM

NUT

.

~

49198

BRACKET

,-tTIH4-601

Figure 12-Carrias,e AuemlJy

49197

!52972

BRACKET

SCREW

I

www.SteamPoweredRadio.Com

B

Base Assembly

Plate,

motor Pulley. Pulley,

Pulley, Resistor, 7 Screw,

Screw, s

Screw, shoulder, Slide,

Spring, friction-drive tension

Spring, slide

Spring

Switch, beater,

Switch, master,

Switch, Transformer

unit

idler motor, MI

motor

shoulder,

houlder,

idler

, speed-

power, for

for

-11825

, Ml-11826

ohm, 5 watt

for

for on-

for

-pulley disengaging

shift

arm

three

for

all drive

( T-1) ( complete

one

or

two

(R-1)

idler-pulley arm

and-olf

slide

position

transformers)

lamps

motors

(S-4)

(S-1)

replacement

Recorder-Head Drive Assembly

Ball

,

dutch

Collar,

lower

drive

shaft;

with

two

Collar, Outch;

Gttr,

Housing,

Indicator,

Lamp,

Pulley, assembly, spiralling-drive

Pulley, feed-screw

Rack, pitch-change

Shaft, pitch-change;

Socket, pitch-

Spring, dutch

Spring

Spring, pitch-change

Wheel,

Arm,

Lamp,

Pin,

upper

drive

shaft;

with

less

spring

and

ball

pitch-change;

dutch; with

pitch

pilot,

equivalent ( A-2)

pin,

and

spring

, pitch-change

friction-drive

with

set

two

pitch-change,

drive

gear

with

change

pilot

knob locking

Mazda

knob,

lamp

Microscope and

Arm,

lower,

microscope

Arm,

upper Bearing, microscope-arm Bracket, microscope

pilot, Microscope Nut,

cap;

Nut,

cap; microscope adjustment-shaft

Nut,

thumb

microscope

Shaft,

lower

Shaft, microscope

Shaft,

upper

pilot

, microscope

Mazda 51

for

upper

microscope

, microscope

thumb-nut;

microscope arm

adjustment

microscope

lamp

thrust

or

equivalent (A-

arm

screw

let

Arm

with

screws

LIST OF PARTS

Stod,

(cont.)

lever

( S-2)

set

screws

two

set

screws

44

or

collar,

groove

Assembly

1)

arm

shaft

groove

No

49254

49257 49260 49278

52567

49265

49267 49266

49259

53321 43905 49262 52498 49273 41592

52400

43238

49194

49192 53

23 49240 49191 49246

11765 53849 49158 43217

49230 49241 43220 49232 43221 49190

49216 49218

49217

49222 49220 44887

49215

49225

33134

49208 49223

49244

49226

49221

(Continued)

..

screw

sec

S1od1No

49219

48791

49224

49199 49170 49198 49197 49203 49196 49171 49189 49169 49168 52972

49175

49174

49185

49173 49177 49172

49139 491S5 49212 49210

49160 49201 49202 49154 49166

49213 49167 49204 49151 49162

53320

49211

49207

49249

49250 49251 49252

49195 48018 49205 49214

49152

19716

49187

49209

3lti08

D~smt,liO#

Socket, microscope

Switch, microscope

Washer, spring,

pilot

lamp

pilot

lamp

microscope

( S-5)

pilot

lamp

Carriage Assembly

Arm,

carriage-lift

Arm,

feed-nut Bracket, Bracket, Carriage Cover,

carriage

Feed

nut

Pio,

feed-

, feed-nut disengaging Plate, carriage Screw,

thumb, Shaft, recorder-head Spring, feed-nut Spring

, friction Spring, la Spring, Stud,

shoulder,

3

Bearing, ball, Button, Cam,

drive-head Oamp, Collar, Guide, Guide, Indicator Lever, feed-nut disengaging Lever,

drive-head

screws

Lever, stylus Nut,

thumb,

Pio

, end-bracket time-scale

Pin,

time-scale Plug, for Post, driveScale, pitch-indicator Scale, recording-time, 96, 104, 112, 120-78 Scale,

recording Scale, recording-time, Scale,

recording Screw, feed;

Screw, pivot,

Spting, depth Spring, drive-head Spring, S

pring

, slide

Stud,

depth

Tube,

suction,

Was

her, spring,

support;

recorder-bead

slide

and

bushing; with

nut

arm

back-support

to

tch

slide

suppon

latch

with

support;

support

mount

lift

engaging

2

aet

recorder

screws

with

head

Carriage Drive Assembly

for

feed

screw

plug, for

suction end left; right;

, carriage position

connection

end-bracket time-scale support

end

housing

disengaging,

tube

bracket

head

feed screw;

with

two

machine screws

with

two

disengaging; with

lowering

for

depth

support

to

spring

-time, 128, 136, 144, 152-78

96.

-time, 128, 136, 144, 152-33¾

with

flange

recorder

adjustment

engaging

tightening

adjustment

shaving

end-bracket time-lc:ale

with

machine screws

and angle adjusuneocs

support

equalizer

104, 112, 120-33¾

head

remover

let

screw

set

two

suppon

www.SteamPoweredRadio.Com

14

41202

41181

(.UIO(

L.1.VC.A

,,au

4t212

CAM

,OST

ao,a

Figure

13-Carrioge Drive JwemlJy

SCA[W

..

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