Brenell Mark 610m User manual

•.

0

-~--"'*·J

...

.,

...

..,.

••

0

...

_

•

The

recording

requirements

of

many

people

have

not

developed

beyond

the

elementary

stages

of

making

the

recording,

rewinding

the

tape

and

then

listening

to

the

recorded

programme,

but

others

are

far

from

satisfied

with

such

a

procedure

and

the

ability

to

hear

the

recording

as

it

is

made

is

an

essential

facility. This

latter

system

must,

of

course,

employ

an

extra

head

and

amplifier

for

Playback

purposes

thus

adding

to

the

cost

of

the

machine

-an

additional

cost

which

is

worth

while

in

order

to

know

immediately

the

quality

of

the

recording.

Brenell

have

found

such

machines

to

be

in

great

demand

so

it

is

not

surprising

to

find in

their

range

of

new

equipment

a

superb

model

giving such a

facility-and

in

addition

this

model

(MK

6

Type

"M")

has

switching

provided

to

enable

the

recorded

material

to

be

immedi~tely

compared

with

the

programr:~e

material

being

fed

to

the

recorder

(a

system

known

as

A/B

comparison)

.

In

addition

to

facilities

for

record

'

;1g

from

microphone,

Radio,

etc., special

compensation

circuits

are

incorporated

in

the

recording

amplifier

to

enable

recordings

to

be

made

directly

from

magnetic

and

ceramic

gramophone

pickups

(normally

one

has

to

feed

pickups

via

separate

pre-amps)

and

mixing

facilities

between

microphone

and

pickup

is

possible

by

means

of

a

cross-fade

system

(a

single

control

fades

out

one

signal as

it

fades

in

the

other).

Mod.

ern

transistors

and

techniques

have

enabled

high

powered

amplifiers

to

be

designed

at

a

fraction

of

the

weight

of

their

valved

counterparts,

it

is

not

surprising

therefore

to

find in

this

superb

portable

recorder,

a

power

output

of

15

watts

available.

Wide

range

Bass &

Treble

control

circuits

are

also

incorporated.

Whilst

we

think

principally

of

thi_s ma-

chine

as 3 fa,

pe

recorder,

it

must

be

remembered

that

its

amplifier

may

be

used

independently

of

the

recording

facilities

for

reproduction

of

Radio,

Gramophone

and

microphone

signals in

the

home

or

hall

(Public

Address).

The

tape

deck

incorporated

in

the

Brenell

MK

6

"M"

rL

_order has 3

motors,

4

tape

speeds,

pausing

mechanism,

digital

revolution

counter,

end

of

tape

(or

tape

breakage)

stop

and

3

heads

of

the

highest

quality.

The

low

wow

and

flutter

content,

wide

frequency

range

and

excellent

s:gnai

to

noise

ratios

are

all

important

factors

which

make

this

machine

so

technically

superior.

TRANSPORT

SYSTEM

(DECK)

3

outer

rotor

motors

(Hysteresis

Synchronous Capstan Drive

for

utmost

speed Stability).

Large Dynamically Balanced Flywheel

(for

minimising

wow

and

flutter

in

the

transport

system).

4 Tape

Speeds-

15

,

7t,

3i

and

It

i.p.

s.

Reel

sizes-

up

to

Btin. (21 ems.)

diameter.

Heads-

3 heads (Erase, Record, Replay), t

track

mono.

Tape

Tension-

Light friction brake

(adjustable

from

top

of

deck

,

to

ensure

correct

tension

for

call reel sizes).

Fast Rewind +

Wind-on

times -

under

60

sees.

for

I200ft. (360m.) tape.

Braking System -Positive, reliable system, self compensating

with

lining

wear

.

Pause Mechanism -Robust, simple

to

operate

, lockable.

Position Indicator -4 digit revolution

counter.

Push Button cancellation.

Wow

and

flutter

measured on

Gaumont

Kalee

wow

and

flutter

me:

ter.

15

i.p.s. less

than

0.05%

7t

" " 0.08%

3!

, ..

Ct.Ol%

End

of

tape

or

tape

breakage

auto-stop

.

It

,

..

0.

12

%

TAPE AMPLIFIERS

Separate

record and replay amplifiers.

Record Amplifier .:-

Inputs

for

magnetic Pickup.

Ceramic

Pickup.

Mi

crophone

(Sensitivity

100

microvolts-

overload 55dB).

{Optimum

mic. impedance 200-'250

ohms).

Auxiliary Signals (Sensitivity 5

millivolts-

impedance 250K

ohms)

.

f.

Ul NAC.., 4 HV

47

/'( ,

(Radio-

Hi

Fi

Pre-amps,

etc.)

I

P.

v ' c

eJI.-'

/6

-I I r '-

Compensation

for

pickups selected by single push

button.

0 rw ·

,_,

-t

Mixin&

of

inputs-

by pressing

appropr

i

ate

buttons,

mic and

pickup

signals may be mixed

for

recordine and P.A. purposes.

Record Level

Metering-

A laree, edgewise scaled, illuminated

~

eter

enables precise recording levels

to

.

be

maintained.

" Replay

Amplifier~:-

Power

Output

-

15

watts

into

8

ohms

@

1%

distortion

.

8

watts

into

15

ohms @ I%

distortion.

Bass

Control

-IBdB

to+

18dB@

50Hz (

c/s).

Treble

Control

-15dB

to

+

15dB

@ 12KHz

(Kc/s).

Output

Sockets

for

Ext.

Speaker

(8

to

15

ohms)

Type BS666.

Ext. Amplifier (220mV from fully modulated

tape)

BS666

.

GENERAL

Frequency responses

(Record/Replay)

:-

15

i.p.s. (38cms.)

40Hz

to

22KHz

±2dB

.

7t

i.p.s. ( 19cms.) 40Hz

to

20KHz

±2dB.

3!

i.p.

s.

(9

.5cms.) 50Hz

to

15KHz

±3dB

.

1

f i.p.

s.

(4.75cms.) 60Hz

to

8KHz

±3d

B.

Signal

to

noise

ratio

-56dB

unweighted.

A/B

Switching -Provision

is

made

for

"off

the

tape"

monitoring

and

direct

comparison

of

recording with

the

original signal.

The replay signal level may be independently controlled by

the

A/B

balance

cont

rol

in

order

to

obtain

the

correct

replay level

at

all speeds

for

critical comparison

of

recorded signal with

the

original.

Internal

Speaker-

A high quality

speaker

is

fitted-this

will be automatically disconnected when

ext.

speaker

is

used.

Amplifier Tape Speed Compensation - 4 push

buttons

are

provided

to

enable

the

correct

recording and replay compensation

circuits

to

be

selected

. These

are

deliberately

not

linked

to

the

speed change switch

so

that

individual

requirements

of

operators

may be

met

. ·

STRAIGHT AMPLIFIER

By

pressing

the

"A"

button

the

preamplifier circuits

of

the

recording amplifier

(prior

to

recording compensation

circuits)

are

coupled

to

the

main amplifying circuits

of

the

replay amplifier,

thus

there

becomes available a versatile, powerful Hi-Fidelity amplifier

such as

Q,ne

would normally purchase as a

separate

unit

. The Specifications

under

these

conditions

are

as follows:-

Power

Output-

15

watts

into 8 ohms

for

0.02%

distortion.

8

watts

into

15

ohms

for

0.02 %

distortion

.

Input sensitivities

for

above

output

levels:-

Mic

. 2 millivolts

Mag. P.up 3 47K ohms

Cer.

160

1.5

megohms

Radio

95

, 250K ohms

Bass

Range@

50Hz

-18dB

to

+

18dB

.

Treble

Range@

12KHz

-15dB

to

+ 15dB.

Overall Frequency Response

(with

Bass and Treble

controls

to

central

(flat)

position):

±2dB

20Hz

(c/s)

to

30KHz

(Kc/s)

.

Signal/Noise Ratio

of

Straight

Amp. - Auxiliary position 78dB.

The

recorder

is

designed

for

vertical

or

horizontal

operation.

Si

ze

of

Cabinet-

171in. X 16lin. X Sin.

Weight-

37 lbs.

nett

.

-+le

""/

t;.

(

.,

(.)(...

'

'-

v

i+

u k

Brene/1 Engineering reserve the

right

to

alter

the specification as

modifications

are made.

Brenell Engineering· Co. Ljd.

231/235

~tPool

oad,

j:9"cttiil,'

./

Tel

,.

o.:

o~

O'f

827

;

''72.

I

z_

J?

(Q

f

I .

I

BRENELL

MARK

6

TYPE

"M"

AND

MARK

610

TYPE

"M'

'

TAPE

RECORDERS

.

Opera

ting Instructions

·'

THIS

MACHINE

IS

FOR

USE

ON

A.C.

SUPPLIES

ONLY

Mains Adjustment Plug

Befo1e

connecting

the

recorder

to

the

A.C.

maim

supply

check

that

the

mains

adjustment

plug,

situated

in

the

circular

recess

at

the

rear

of

the

cabinet,

is

sel

to

the

correct

position,

i.e.

·

Mains

Cable

240v for mains

of

22'0v to 250v

21

Ov

for mains

of

200v to 220v

115v for mains

of

100v to 125v

This is a

three

cored

cable

stored in

the

pocket

situated

near

the

carrying

handle.

To

this

cable

a

suitable

3

plug

should

be

connected

as follows:

L~cing

the

Tape

Earth

to

Yellow/Green

Live

to Brown

Neutral

to Blue

Fit

the

full reel

oftape

to

the

left

hand

spoolholder

so

that

the

tape

feeds

from

the

left·hand

side

of

the

machine

through

the

slot

between

the

head

covers

and

via

the

adjustable

tape

guide

to

the

empty reel which should

be

fitted

to

the

right

hand

spoolholder.

If

correctly

laced,

the

glossy

side

of

the

tape

will

be

facing

the

operator

and

the

tape

will

lie

between

the

heads

and

pressure pods

and

also

between

the

two pins

near

the

left

hand

tape

guide,

i.e.

in

front

of

the

auto

stop pin which

movesin

the

slot but to

the

pad

'5ide

of

the

whic~

,

is

attached

to the erose

{L.H.) pressure pad

arm.

Care

~ho\,Jid

be

taken

to ensure

that

the

tape

does

not become twisted when

attaching

it to

the

empty

reel.

i.e.

the

coated

side

of

the

tape

must

face

the

hub. ·

Spool

R~taining

Sc~

Screws

are

supplied for

retaining

the

reels

of

tape

on

the

spool

holders.

It

is

advisable

to

fit

these

screws

even

though

the

machine

may not

be

used in

the

vertical

position.

Adjustable

Tape

Guide

(Mark 6 Type "M'i

only)

The

extreme

right hand

tape

guide

may

be

moved in

the

vertical

plane

in

order

.to

feed

the

Jape

to

the

take-up

reel

without

it

touching

the

edges

of

the

reel.

13-1

To

adjust,

hold lower

milled

edge

and

then

turn upper

edge

in

an

anti-

clockwise (unscrewing)

direction.

You will

then

have

twp sections

which may

be

relocked

at

the

height

necessary

to feed

the

tape

centrally

to

the

.

take-up

reel,

by

holding

the

lower

section

and screwing

the

upper

section

hard

against

it.

Deck

Switches

The two·

large

knobs

control

the

Fast

Wind,

Fast Rewind, Record and

Replay functions

of

the

tape

deck

whi

1st

the

small knob

is

used for

the

selection

of

the

tape

speed.

Speed

Changing

The switch

provided

has

three

positions but

the

tape

speed

wi

II

depend

also

upon

the

size

of

capstan

sleeve

in

use.

If

the

head

covers

are

removed

(Pl

r

'l

Fit)

one

may observe

the

brass

capstan

sleeve

to

the

right

of

the

tape

heads.

The

sleeve

is

a

tight

fit

over

the

spindle

and

is

retained

in position by means

of

a grub screw (see

side

of

capstan

sleeve).

Two

sleeves

are

provided

with

each

recorder

normally

the

larger

sleeve

is

fitted

and

the

smaller

sleeve

is stowed

inthe

pocket

in

the

top

of

the

cabinet.

When

the

larger

sleeve

is used

the

three

speeds,

38cms (15 i .

p.s.),

19 ems

(7!

i

.p

.s

.)

and

9.5

ems (31

i.

p

.s.)

may

be

selected

by means

of

the

speed

change

switch (see

switch

positions

marked

38,

19,

9

.5)

whilst with

the

··

smaller

sleeve

in use

the

speeds

for

each

switch position

wi

II

be

halved

(see

alternate

markings

19,

9.5

and

4.75).

Note

that

the

switch

has

but

three

positions

and

the

knob

cannot

be

turned

more

than

60

degrees.

Should a

capstan

sleeve

be

changed,

ensure

that

.

there

is a

clearance

of

approximately

1/16th

inch

between

the

bottom

of

the

sleeve

and

the

top

of

the

bearing

which

protrudes through

the

deck

plate.

. .

.

'·

Revolution

Counter

~

<"

l • I A

digital

revolution

counter

is

fitted

-pressing

the

button to

the

right

of

the

·

counter

resets all

digits

.to

zero.

Pause Control

.A

lever

to

enable

.

the

tape

movement to

be

stopped.

fvA.ove

to

extreme

right

hand

side

to lock

control.

Do not use this control when

winding

or

rewinding

the

tape.

,lv\ains

Supply Switch

13-2

The mains supply

to

both

the

Deck

and

Amplifier is

switched

by means

of

the

extreme

right-hand

button

on

the

amplifier

panel

.

. This switch is

of

the

push-push

type,

i.e.

push for on

or

off.

It

is suggested

that

after

loading

the

machine

with

tape,

the

operator

should

familiarise

himself

with

the

deck

functions

{not

necessarily

changing

the

capstan

sleeve

at

this

juncture.).

Chctk

fast

wind,

fast

rewind,

playback

and

record,

noting

that

interlocking

prevents

the

large

L.H.

knob

from

being

turned

when

the

R

~H.

knob

is in

use

and

vice

versa.

· · c

It is

important

to

remember

that

tl--~

small

block

button

to

the

left

of

the

Record/Replay

.

knob

must

be

pressed

before

that

knob

con

be

turned

to

.RECORD. This

button

will

automatically

return

to

the

safety

position

when

the

record

replay

knob

is

returned

to

the

'Stop

1

position.

Amplifier

Controls,

Sock_

<:ts

and

Push Buttons

Push Buttons (from

left

to

right)

\

13-3

(1) P

.U.

Comp -This

button

enables

the

circuit

characteristics

for

Ceramic

(button

down)

or

Magnetic

(button

up)

Gramophone

Pick

Up

cartridge

to

be

selected.

Action

of

switch

is

"Push-on

Push-off

11

and no

other

button

or

switch

is

released

when

this

button

is

used.

{2)

P.U.

-Press to

bring

Into

circuit

the

sockets

marked

"CER

P.U.

11

and

"f.MG

P.U."

Note

that

only

one

of

the

sockets

may

be

used

at

any

one

time

and

the

selected

socket

will

be

determined

by

the

setting

of

Button 1

(P~U.

Comp.)

These

sockets

ore

for

direct

connection

to a

pickup

and

not

for

outputs

from

Hi

Fi

amplifiers,

etc.

(3)

Mic.

-Press to bring_

into

circuit

the

socke

"t

marked

IIMIC

II

for use

with

a

microphone

of

200-

600

ohms

impedance.

4)

Rod

..;,

. Press

to

bring

into

circuit

the

socket

marked

"Rod

II

for

recording

from Radio

receivers

a•

-

:1

high

level

signals

such

as wi II

be

obtained

from

Hi

Fi

amplifiers,

etc.

NOTE:

Buttons - P

.U.

1

Mic

and

Rod

-

When

one

is

pressed

the

other

two

will

be

released~

However,

mixing

of

microphone

and

P.U.

signals

may

be

ol

'

lained

ifboth

P.U.

and

Mic

buttons

are

pressed.

Under

these

conditions

the

MIXER

CONTROL

is

brought

into

circuit

(see

notes

on

MIXING).

(5)

11

A"

-

When

pressed,

the

signals

fed

into

P.U.,

Mic

and

Rod

will

be

fed

'Straight

Through'

the

amplifier

and

speaker.

Used when

amplifying

with

or

wi.thout

recording

and

for

comparison

purposes

when

recording.

NOTE:

Amplification

of

Mic

signals

will

cause

a

howling

sound

if

Mic

and

speaker

are

too

close

and

the

amplifier's

volume

control

is

advanced

too

far.

6)

11

8

11

-This

button

is

interlatched

with

"A".

When

"B" is pressed

'A"

wi II

be

released

and

signals

from

the

tape

wi

II

be

passed to

the

amplifier

and

speaker.

. ·

The

level

of

playback

signal

may

be

adjusted

by

means

of

the

"A/B

Balance"

control.

Alternate

pressing

of

the

A

and

B

buttons

whilst

recording

is

taking

place

will

enable

the

operator

t,..

make

a

critical

comparison

between

the

recorded

and

~

original

signals;

the

A/B

balance

control

should

be

used to

bring

the

playb?ck

signal

strength

to

that

of

the

origiral.

7)

8)

9)

10)

4.75

9.5

19

38

These

interlatched

buttons enai.Jie

the

correct

recording

and

replay

amplifier

characteristics

to

be

selected.

Press

the

button

which

corresponds

with

the

tape

speed

selected.

SO~KET

EXT

AMP.

Available

at

this

socket

is a signal for

feeding

to

an

external

amplifier

(Hi

Fi

or

Public

Address) Signals from this

so

.

cket

wi

II

not

be

affected

by

the

Treble,

Bass

or

Volume controls

but

the

setting

of

the

A/B

Balance

control

will

affect

the

Replay

level.

·

SOCKET

EXT

SPEAKER

For

feeding

signals

to

an

extcr · al

loudspeaker.

The

impedance

of

such

a

speaker

should

be

8 ohms

or

rnore.

Internal

Speaker

wi

II

be

disconnected

when

external

speaker

is

plugged

in.

BUTTON

ON/OFF

Mains

Switch.

Push

on/Push

off

for

connecting

and

disconnecting

mains

power.

Power

on

is

indicated

by

the

illumination

of

the

meter.

MIXER

CONTROL

Used -for

mixing

of

pick-up

and

microphone

inputs.

Operative

only

when

"P.U.

11

and

"Mic"

buttons

are

pressed

down.

See

notes

on

"MIXING".

RECORD

CONTROL

This

control

wi

II

be

operative

o.. ly when

the

deck

is

switched

to

Record.

Adjust

levels

as

necessary

to

give

a

recording

signal

which

at

peak

levels

causes

the

meter

needle

·

to

rise to 0

dB

(the

beginning

of

the

red

position

of

the

scale.)

'

~

•

~

:.

~

-

j_.

A/B

BALANCE

CONTROL

·

Adjusts

only

signal

level

from

playback

head.

The

odjust~ent

wi

II

only

be·

apparent

when

button

11

B

11

is

pressed and

the

tape

is

in

motion.

See

also

(6)

above.

TREBLE

CONTROL

-·

Affects

the

high

freql.lency response

of

the

signal

in

both

"A

11

and

"B"

operating

modes.

The H

.F.

characteristic

of

the

signal

being

recorded

is

not

affected

by

this

control

•.

The

range

of

adjustment

covers

-

:.15

dB+

15

dB

at

12

KHZ.

BASS

CONTROL

13-4

Affects

the

low

frequency

response

of

the

signal

in

both

"A"

and

"B"

operating

modes• . The low

frequency

characteristics

of

the

signal

being

recorded

is

not

affected

by

this

control.

The.

range

of

adjustment

covers

-

18

dB

+

18

dB

at

50

Hz.

.

VOLUME CONTROL

Adjusts

the

sound

level

from loudspeaker and

is

common to

the

signal from

the

recorded

tape

("8"

button

pressed) and

the

original

signal

being

fed

straight through·

the

ampI

ifier

("A"

Button pressed}. ·

BOCORDING

PRQCEDURE

.

~

::'

.;

\ . '

f''l'·

.

~

'.

. '

13-5

. 1

~

lace

Tape

on

deck.

2.

Select

tape

speed

(the

faster the

speed,

the

better

the

quality

of

recording).

3.

.Reset

Dig

Hal

counter

(Press button to right

of

it).

4.

Switch on Mains

Supply.

5.

Feed signols to

be

recorded

into oppropriate input

socket

and press

the

appropriate

selector

button.

6.

Press

button

"A"

(To

hear

the

programme you wish to

record).

7.

Adjust Volume

control

for normal listening

level.

NOTE:

If

recording

is to

be

made from a m_icroph()ne do not

advance

this

volume

control

otherwise feedback

between

th.

f!

microphone ·

and

loudspeaker

will

cause

a howl to build

up.

Headphones may

be

plugged

into

the

ext.

speaker

socket

if

microph9ne

recordings

are

to

be

monitored.

B. Adjust

Treble

and

Bass

Controls as

desired.

9.

Press Button

which

corresp.,.

::1d

_s to

tape

speed.

10.

Switch

Deck

to Record Position (small black button must

be

pressed in

order

to permit this switching

action).

12.

Immediately

operate

Pause Control (lock by moving to to

right

of

slot).

Adjust Record

level

control

until loudest signals

cause

meter

needle

to rise to 0

dB.

Note

position

of

knob

pointer

then

turn

control

down

to

minimum position•

Release

the

Pause

Control

and

advance

the

Recording

level

control to

the

position

noted

to

cause

peak signals to raise

the

needle

to OdB. ·

13. . Press B

button

to

enable

the

recorded signal to

be

hea~d.

14.

Adjust A/B Balanc.e

control

to

give

a recorded

level

similar

to

the

original

signal

level

heard

when A button is

pressed.

Alternate

pressing

of

the

A and Bbuttons whilst

adjusting

the

A/B

Balance

Control

may

be

necessary. -

the

object

being

to

obtain

a

recording

which

is similar to

the

original

sound.

In

some

circumstances

the

level

of

the

original signal may

be

too low

or

too

great

for c•.

tical

comparison purposes• .

A

balancing

of

signals

to

the

Radio input

socket

should

be

possible

with

levels

ranging

from

50

mV

to 300 mV. ·

.•

With

lower

input

level

signals

than

50

mY

the

recorded

signal

from

the

tape

wi

II

be

greater

than

the

original

signal

level

even

though

the

A/B

balance

control

is

turned

to miniQ'lum.

Conversely,

higher

levels

of

input

signal

than

300

mY

wi II

be

greater

with

the

A

button

pressed

than

can

be

obtained

from

the

Tape

with

the

A/B

ba

I

once

centro

I

set

to

maximum.

MIXING

Signals

fed

into

the

microphone

and

pickup

sockets

may

be

mixed

if

both

Mic

and

PU

buttons

ore

pressed

(steady,

equal

pressure

on

both

buttons

wi II

cause

them

both

to

be

latched

down).

When both

buttons

are

down,

the

mixer

control

will

be

brought

into

circuit

and

when

fully

clockwise

the

microphone

signals

wi II

be

at

maximum whi

1st

turning

this

control

in

the

opp6site

direction

will

raise

the

pickup

signal

to

maximum.

When

either

signal

is

at

maximum,

the

other

signal

wi

II

be

cut

off.

With

a

little

practice

perfect

fod!'2g

in.ond

out

of

these

two

signals

and

when

required

the

mixing

of

them

will

be

achieved.

Neither

signal

should

c~use

the

.

eedle

of

the

meter

to

enter

the

red

pOsition

of

the

scale

..

govern

this

level

by means

of

the

Record Level

Control.'

The use

of

headphones

wi II

be

invaluable

·in assessing

the

degree

of

mixing

(remember

that

the

loudspeakef

.

should

not

be

used whi

1st

recording

.

from a

microphone).

For

speech

with

musical

background

to

be

clear

the

musical

background

should

he

very

low.

·

'·

ECHO

EFFECTS

Whilst

warning

has

been

given

that

a

loudspeaker

should

not

be

operative

whilst

using a

microphone

because

of

the

howl

which

may

ariSe,

very

careful

use

of

the

.

loudspeaker

output

may

be

used to

create

on

echo

effect.

The "8

11

button

must

be

pressed,

the

Record

level

control

adjusted

for normal

recording

and

when

the

echo

is

required

very

'carefully

advance

the

main

volume

control

so

that

the

microphone

receives

this sound

which,

being

a

fraction

of

a

second

after

the

original

sound (due to.

the

spacing

of

the

record

and

replay

heads)

wi II

be

re-recorded

as woo ld a

reflected

sound.

The

delay

time

will

dependon

the

tape

speed

so

one

may

have

delay

times

of

1/12;

·

1/6

and

2/3

of

a

second

over

the

four

speeds

of

38, 19,

9.5

and

4.

75

ems.

(15,

7~,

3~

and

1

7/8

i.p.s.)

REPLAY

OF

PREVIOUSLY RECORDED TAPE

J.

Sele~t

the

Tape

d~ck

speed.

2.

·Press

button

which

corresponds

to

tape

speed.

3.

Press

button

ns

II.

".

4.

Press mains

switch

button.

'·

13-6

5.

Switch

Deck

to

Replay.

6.

Adjust Vol.

ume,

Treble

and

Bass

controls

as

required.

7.

Remember

that

the

A/8

Balance

Control

wi

II

alte

r

the

replay

level

~

·

adjust

as

necessary.

.

WARNING:

DO

NOT

SWITCH DECK

TO

RECORD OR

ERASURE

WILL

OCCUR.

GENERAL INFORMATION

Fuses.

The

recorder

may

be

operated

in

the

horizontal

or

vertical

position.

Should

tape

break

or

run

out

during

recording

or

replaying

the

Take-up

motor (right

hand)

wi

II

automatically

be

switched

off.

The

recorder

itself,

however,

will

NOT

be

switched

off;

therefore,

make a

point

of

ensuring

that

the

deck's

record/replay

switch

is

turned

to

the

"OFF"

position

when

the

recorder

is not in

use.

leavin

·g

the

record/replay

switch in

the

"ON"

position

w

H~

mains

switched

off

could

cause

flats

to

develop

on

the

rubber tyred

pinch

and

idler

wheels.

The

back

tension on

the

feed

motor

(left

ha~d)

may

be

adjusted

by

turning

the

small recessed screw

situated

between

this motor

and

the

speed

change

switch • Turning

the

screw in a·

clockwise

direction

wi

II

INCREASE

the

back

tension.

A

change

of

tension

is

normally

only

required

when small

reels

or

reels

with

very

small

diameter

hubs

are

used,·

such

reels

.

will

require

a REDUCTION

of

tension

i.e.-

turn

screw

ANTICLOCKWISE. The normal

setting

for

the

screw is: "with a full

7"

reel

of

tape

on

the

l.h.

spoolholder

the

back

tension should

be

just

sufficient

to

prevent

the

tape

unreeling

jerkily

whel'l passing

the

heads

at

a

selected

tape

speed."

The

effect

of

excessive

pressure

will

be

to

cause

"WOW" towards

the

end

of

the

reel.

Clean

the

tape

oxide

,from

the

heads

at

frequent

intervals.

A

strip

of

·

cloth

damp"fmed

w:th

water,

or

one

of

the

many

cleansing

fluid~

·

available

.for

cleaning

tape

heads,

should

be

gently

drawn

to

and fro across

the

faces

of

the

heads

-

each

head

being

treated

separately

untiI

all

trace

of

oxide

is

removed.

The

pinch

wheel

which

presses

the

tape

against

the

capstan

sleeve

and

the

tape

guides should

be

regularly

cleaned

with

dampened

cloth

(avoid using

the

cloth

which

will

leave

a

deposit

of

fluff).

The meters wi

II

not

oper~te

unless

the

deck

~s

switched

to

the

record

mode.

The

tape

movement may

be

immediately

arrested

if

the

pause

control

is.

. moved

to

the

full

extent

of

its

movement.

If

good

quality

r~cordirigs

are

to

be

made,

it

is essential

that

the

tape

be

fully

and

correctly, modulated as

indicated

by

the

meter

readings

rising

to

OdB points

on

peak

levels.

Two

fuses

are

incorporated

in

this

machine.

Mains Fuse A 2 amp

cartridge

fuse which is mounted

within

the

mains

adjustment

· ·

plug

•. For

access

remOve this

plug

(situated

within

the

circular

recess .

at

the

rear

of

the

cabinet)

and

carefully

prise

off

the

plastic

co.ver from

the

plug.

D.C.

Fuse A 1

.5

amp

cartridge

fuse (plus 1 spore) is mounted

i'nternally.

For

access

. · .remove

the

·two

domed

screws from

the

sides

of

the

cabinet

(FRONT

ONLY)

so

.

that

the

unit

may·

be

rais~

on its

rear

hinges.

1~-7

The 1

.5

amp fuses

are

mounted

within

the

power

unit

in

the

rear

r

.h.

corner

of

the

cabinet.

Brenell Engineering

Co.

ltd.

231-2~5

Liverpool Rood, London

Nl1LY.

Telephone:

01-

607

8271'.

· B

...

-.

,.,

1,. I

..

.

....

..

•.

' · I· .

.'

('

TAPE

LACING

CHART

Speeds

A1.

Tape

Guides

. .

B.

Erase

Head

.

C.

Superimpose

Release

Pin.

01.

Retaining

Post

for

clip·on

Head

Cover.

Dl.

Retaining

Post

for

fi~ed

Head

Cover.

E.

Record

Head.

F.

Azimuth

adjus

.

tment

Screws.

G.

Capstan

Shaft.

H.

Capstan

Sleeve

.

J.

Adjustable

Tape

Guide

.

;.

;n

7;

3i

a•allable !

.P·~

'

...

woth

sm~ll

C'lpH~n

fottcd

to

G

H

K.

Rubber

Fonch

Wheel.

L1, L2, L3.

Pressure

Pads.

M.

Take-up

Pon

.

N.

Pressure

PJd

oper;~tong

lever

.

0.

Crescent-shaped

lever

.

S.

Pressure

Pad Sprongs

T. '

N'

lever

Rclc;~se

S·:r !

;;

V. Replay

(PiaybJck)

Ht

.."

W. Auto

Stop

Speeds

a•adaboe

with

larce

c~psun

fitted

to

G

;.

:'

7}

]1

1i

'f

' .

3f

7t

15

..

.' .' '

l

.,

,. :

31

7t

15

C•t

Please

note:-

The

~opeed

selector

switch

does

not

route

throuch

360

..

[lJ.

u-

7

Brenell Mark 610M User manual

Popular VCR System manuals by other brands