Columbia 461 Schematic

PnoToFACT*

FolJ"*

COLUMBIA

MODEL

461

SG

o\t

E-

rr

't

=A

oo

Lr=

PLAY

RECORD

CONTROL

FAST

FORWARD

tvltKE

INPUT

RADIO

PHONO

INPUT

VOTUME

CONTROT

The

material

of

with

receiver

canbeplayed

Output Jack.

Columbia Model

no loss

or

on

standard

of frequency

phonograph,

back

through

GENERAL INFORMATION

461

Tape Recorder

width recording

response

in addition

the

self-contained

quality.

or

to

Figure

tape,

those

1

is designed

doubles

which

Recordings

made

directly from

speaker or

can

an

external

record

to

playing

the
be made

the microphone.

speaker

CONTROT

FAST

R,EWIND

RECORD

INDICATOR

OUTPUT

JACK

RECEPTACTE

play

and

from a radio,

back

time

of a

through use

TONE

TEVEL

AC

two tracks

reel

of tape

television

Recordings

of the

3a

oo

HE

F=

ttrE

It

Model

the

tape, the recording

recorder

This

CAUTION:

Severe Damage

HOWARD w.

461

is

designed

time is

is designed

SAmS

for

a tape

as follows:

ReeI

Size

(600

5"

?"

(1200

to

operate

ft.)

ft.

)

WilI Result If

Manufactured

Columbia

?99

New

fhis

moterial

compiled

& CO.,

Copyright 1956

IIATE

5 - 5O

velocity

on 60

Connection

Records

Seventh

York, N.Y.

lNC.,

.

All Righrs Reserved

7

hour

t/2

hour

t

Is Made

by:

published

per

tf2,,

7 lf 2"

of

Speed

cycle, 110-120

Avenue

ond

INDIANAPOIlS,

second.

volts,

To A Direct

by

Using both channels

AC

supply only.

Current

srT 315

of

(DC)

Line.

INDIANA

FOTDER 3

oes

ru

''E

F*

tn#

Controls:

Fast

Tubes:

Frequent

Power

only

Power

Inputs:

Output:

Meg.Imp"

Bias & Erase

Threading

(2A)andan

ing

plates.

On-Off

Forward,

12AUTA,

Response: 65

Requirements:

70

watts.

@

Output:

Mike

Int.

for

The Tape-

1.

Place

empty reel

sure the

w

&

SPECIFICATIONS

Tone,

Fast

l2A){7,6V6GT,

2

watts

1

Meg.Imp.,

­5"

Speaker, Ext.

Ext. Amp. or

Frequency: 50KC.

RATING

OPE

a reel

reel

VoIume,

Rewind.

to

110-120

undistorted

INSTRUC

of tape

on the

engage

slots

Monitor

@

.'El

Record-playback,

6Xb.

10,000

volts

-

Radio-Phono.

3.2f1

on the right reel

left reel

the

per

cycle

60

-

3 watt maximum.

Speaker,

in record.

TIONS

plate (28)

pins

on the

second.

cycle

A.C.

5 Meg.Imp.

Ext.

plate

mak-

reel

Figure

1

@

2

3. Insert the free

radial

three

reel

the

secured

reels.

Record

To

1.

a

click

tubes to warm up.

2.

jack.

3. Depress

far as it

holding it down.

4.

your

mouth and

"Volume"

flashes

NOTE: Correct

slots in

several turns,

to

the

From

the

Turn

is heard

Insert the microphone plug

go,

wiII

HoId the microphone

control until

on

the loudest

Too weak a

record

playback

weak

Too strong a

to flash

during

playback.

end

of the

hub

the

reel

and

Microphone-

On-Off Tone

and allow

play-record

the

turn

speak

sounds.

recording

signal,

of

clockwise,

all

slack

about

clockwise

in

a normal

h e record

t

volume is

which

level indicator

and

signal,

continuously,

causing

into

tape

empty

the

until

is

taken

thirty

clockwise until

seconds

Control

into

control

until it

about

six

inches

voice.

level indicator

very

does

not cause

to flash,

high

will

will

background

the level indicator

result in distortion

one

of the

reel.

Turn

the tape is

up

between

for the

the

"Mike"

(3)

knob

locks

Adjust the

important.

as

while

from

the

result in

noise.

2.

asectionof

the

side faces

Page 2

Unwind

tape in the tape

about

thetape

rear of

the

10" of tape from

straight with

slot

the

making

recorder.

the reel.

both hands and insert

the dull coated

sure

Hold

To Record From Radio-

Recordings from

of three

ways:

a radio may

be

made

by one

1.

Place the

of the radio

a

to

normal

tortion.

treble.

recording

Microphone".

isfactory

microphone

tape.

conductor

clips

across

and insert
Set

above.

cribed under

phone

across

plug

Ievel

under

of

on this

To Record

plug

Phono"

the

Microphone".

Turn the

Set

as described under

as other

2.

Have

phone plug

on the other end.

the voice coil terminals on the radio speaker

the cord

radio

the

the

Set

3. Have a shielded

plug

the radio volume control. Insert the

into

the

proceed

and

Record From Microphone." The

"To

radio

the

setup

From

1.

If the

on

the

jack.

recording

2.

Ifthe

microphone about 6"

result

a

the

it

too

o n e

t

level and

recording

may be

wiII

speaker. Turn

level.

Setting

radio

recording

the

type of

This

sounds

as

which

a shielded cable made

on one end and

Connect

plug

into the

volume

"To

on

"Radio-Phono"

volume

and may be

phonograph

pickup

Set

as described under

phonograph

and tone controls as described

reqording level and

Record From Microphone".

cable with a two conductor

one end and the other end connected

jack.

with the

and

Phonograph-

leads, insert

the recording level and

recording as described

controls has no

tone

anywhere.

set

being used

has a

standard

to 12"

radio

volume control

high

wiII cause

control to

maximum

proceed

Record From

"To

be

not be

may

picked

up

recorded on the

up

with

two

the alligator

"Radio-Phono"

proceed

recording

the

Set

phone

has a

it into the

proceed

Record From

"To

pin

in front

dis-

with

sat-

by

the

a two

alligator

clips

jack.

as des-

phone

position

effect

type

"Radio-

with

plug

type

Figure

3

is

which

the

the

To

"To

ing as

Dual

the tape

in

accomplished

more common, an adaptor is needed.

plug

pin

"Radio-Phono"

Record From Television Receiver-

Record From Radio"

Track

two

into

the

jack.

1. Use one of the

described under

R6cording-

The

Columbia

is recorded at a

width

recording.

track

adaptor

three

proceed

and

Record From Microphone".

"To

is designed

This

in the following manner:

1. After

a reel

of tape

plug

and

methods described

the adaptor

with

that only one-half

so

time; thereby

two track operation

has

recorded, i.€.

been

record-

the

resulting

Insert

into

under

aII of the tape wound on to the tape-up reel, turn the

play-record

full

the

(2e)

and the

recording.

of

track

by

ing,

above.

Fast Forward And Fast Rewind-

pressing

by

control

2.

Remove the

reel over and

Properly thread the

3.

4.

After

recording is ready

reversing

speed

High

the desired

(3)

to

reels from

placing

empty reel

this

track

the

forward or

idle.

recorder, turning

the

it

on the

on the

has been

to be

left reel

tape and

played

right reel

proceed

recorded

without

plate

plate (2B).

with

first

the

rewind-

reels as described in step

reverse can be obtained

knob

(4A

or

48)

toward

the

the

3a

oo

HE

F=

5E

It

is

2

Page

3

head

cover.

tape on

control

marily

a few

the desired

is held

in

locating a desired

seconds.

CAUTION:

Braking-

The

when in

Columbia

high

Forward"and
cover

and

example:

control

control

release

stop

will

To

Plav

The

depressing

desired
To

Use An

the

three

sketch.

recorder

speaker

CAUTION:

To

Edit

NOTE:

then release

when in

and

toward

both

is desired,

glide

to a momentum

A

Recordins-

1.

Thread

Tape".

2.

Turn

until it

3.

Adjust

listening

External

1.

You may

one

in

the recorder.

conductor phone

2.

Plug this into

thru

is

cut

And

Since it is

track
which are

one

1.

portions,

Thetapemaybeedited

or

sequence.

selections,

together

etc.

for re-use.

Movement

of these controls

reel at

in this

Do

not attempt

Rewind"
on anything

to the unit

position.

with

but idle

or breaking

result.

is

equipped

speed, either

Rewind"

"Fast

both

fast forward

with

the other

head

controls

cover.

at

the

release

tape

as described

play-record

locks.

the

"Volume"

level.

Speaker-

want

to use

plug

the external

the

off.

Do not

Output

attached;

connect

jack

without

as

transformer,

result.

Splice Tape -

impossible

without

affecting

to be

track

only,

joining

by

Announcements

Unusedsections

a high

speed

These are used

portion

Forwardt'or

"Fast

play-record

the

position,

with a

direction.

controls

at

the same

speed,

hand

move

When

same time.

control in

stop.

under

and

(B)

clockwise

,Tone"

control

a larger

To do

this

connected

Output

jack

speaker.

three

conductor

external

damage

and

edited

to the

"Tone

to edit

the

other, recordings

should

by

cutting

selections

may

be

of

tape

will wind the

as

long as

of a recording

"Fast

control

as

of

damage

the tape

quick

Move both

toward

"Fast

the head

time.

continue

"Fast

machine

motion and

you

Control"

and

to hold

Rewind"

stops,

a coasting

If

'Threading

without

controls for

speaker than

wiII

need

as

shown

play

and

The internal

plug

speaker

output

tube,

splice

be limited

out unwanted

into another

inserted

can

between

be spliced

the

pri-

(3)

may

stop

For

tape

the

into

may

one

Erasing

in

is automatically

on the

without
recording

set

To

Phono"

position.

"Volume"

speaker or

Removing

and

pressure pad

from

connect

screws from bottom

straight

a

in

Spindle

of up

pulley (36

the correct amount

Tape Up And

the

the tape.

control is
witlout

board

and feed

tape is not

armsshouldbe
and

to

enough

revolve

control

position

in
other

view) over until

Lifter

Recorded

Material-

In the record position

tape.

putting

at its

extreme

Use As

1.

Insert

jack.

2.

Leave the

3.

Speak

and

4.

Do

Unit From

All

service

pressure

the carrying

1.

To remove

power

up

(9A

The spindles

anddownmovement.

When

reels

should

Also

looping

(point

erased

If it is

anything

procedure,

counterclockwise

A Public

the microphone

into

ilTonet'

not have

a

feedback

ADJUSTMENTS

roller

assembly

case.

cord

and

out.

and

98) End

4?)

or

and

Feed ReeI Drag

play-record

t}te

stop right

when in fast forward

released

the

ttBt'i

on exploded

reel arms

moving

bent

the feed reel

arm

belt tension

without

(3)

when making

place

the

dose, force

Arm

the reels in

should

spindles

it

(16)

Adjustment-

be in its extreme

the stop arm

stops

any recording

before

desired

but leave

Address

a

new recording

to

on

the tape follow

the

System-

erase

"Volume"

position.

plug

play-record

control

the microphone

controls for

desired level.

the microphone

howl

will result.

Case-

except

work

and adjustment

cleaning

require removal

unit from

and remove

of case and

Play Adjustments-

should have

move

of

end

carrying

the four

from

Loosen the

pulley

the

play

is

obtained.

Adjustment-

carefully lift unit

control

away

prevent

to

or rewind and

the reels

tape.

should coast

The stop arms

view)

(31

and

are

52) rest

what

govern

to forcethetake-up

(31)

over for enough

so that

this adjustment.

should not revolve.

the

place.

(point

revolving.

spindles

counterclockwise

on

the tape

is

a recording

the normal

control

into

the

"Iladio-

(3)

in idle

and adjust

too close

of the head and

phillips

L/32,, to

set screw in the

up or down until

(3)

on

that the

against

this.

reel arm

The

With

"8"

to the

of the head

of the

case,

unit

dis-

head

L/I6,,

is released,

looping

to a

stop

the motor-

take-up

when tfie

The stop

(b2)

to take

just

start to

play-reeord

the reels

If one or

on

the

exploded

put

the

of

the

up

join

side

Page 4

2.

Forbestresul.ts,

ends

together

and

trim

off any excessive

with

cut

tape at

splicing

a slight diagonal,

tape

width.

on the

glossy

This adjusts

on

play-record

the

the record

the distance

position.

that

switch

will move

If an adjustment

the contact

going

when

is

necessary,

strip

into