Garrard 301 User manual

Tre
MANUAL
for the
GARRARD MODEL 301
TRANSCRIPTION
MOTOR
eee ek ke &
<a
GARRARD ENGINEERING AND MANUFACTURING COMPANY, LIMITED
Swinpon : ENGLAND

Introduction
A,
the
owner
of
this
Garrard
Model
301
Transcription
Motor
you have
a-unit
whose
perfor-
mance
is supreme
in its
class
and
this
manual
has
been
prepared
to enable
you
to enjoy
and
maintain
the
high
performance
which
this
motor
can
achieve.
Should you require any further information
or advice not covered by this manual, please do not
hesitate to ask your nearest Garrard agent or write
to our Technical Service Department, Newcastle
Street, Swindon, who will be pleased to help you.

FIRST EDITION 1954
SECOND EDITION 1956
THIRD EDITION 1957
FOURTH EDITION 1958
FIFTH EDITION 1959
SIXTH EDITION 1961

Index
page
DESCRIPTION - - - - - 7
OPERATING INSTRUCTIONS - - 8
TECHNICALDETALS- -- -> - Il
MAINTENANCE by ean ee, SR
INSTALLATION INSTRUCTIONS - 13
SERVICEADJUSTMENTS - .- - 17
SPARESLIST
-
- -
-
-
19
This
Manual
is
supplied
with
Motor
number
AIRF,
&

THE GARRARD MODEL 301 TRANSCRIPTION MOTOR

Description
Tee
Garrard
Model
301
Transcription
Motor
is
the
culmination
of
over
40
years’
experience
in
the
design
and
manufacture
of
high
quality
gramophone
equipment,
and
this
motor
has
been
designed
to
provide
the
professional
user
and
quality
enthusiast
with
a
unit
supreme
in
its
class.
The
Model
301
Transcription
Motor
has
three
controls,
the
speed
range
knob
on
the
right
hand
side,
speed
adjusting
control
in
the
centre
and
the
on-off
knob
on
the
left
hand
side.
It
has
extremely
low
wow
and
flutter
content,
rumble
being
almost
non
existent.
Each
of
the
three
speeds
is
adjustable
by
means
of
a
knob
which
operates
a
specially
designed
eddy
current
brake
to
enable
the
precise
speed
to
be
obtained.
Great
attention
has
been
given
to
details
appreciated
by
the
connoisseur,
such
as.a
sup-
Pressor
unit
to.
avoid
switch.
clicks,
a
heavy
turntable
diecast
in
aluminium
and
accurately
balanced,
a
robust
hardened
and
super
finished
turn-
table
spindle,
a
fully
retracting
intermediate:
wheel
and
a
brake
to
reduce
the
free
revolutions
of
the
turntable
on
switching
off.
The
unit
is
supplied
complete
with
strobo-
scope,
record
adaptor
for
7”
large
hole
records’
and
clip,
a
bottle
of
special
oil,
all
fixing
screws,
set
of
spring
suspensions,
template,
manual,
and
test
report.
7

Operation
To
operate
the
Garrard
Model
301
Transcription
Motor
proceed
as
follows:—
(1)
Move
speed
range
knob
to
desired
speed
Diagram
1
(2)
Place
record
on
turntable
Diagram
2

@) Switeh on
Diagram 3
To
set
speed
place
a
record
on
the
turntable
and
then
place
the
stroboscope
on
the
record,
Start
motor.
Place
pickup
on
record
and
turn
the
speed
adjusting
knob
until
the
ring
of
lines
applying
to
that
speed
for
which
you
are
setting
appear
to
remain
stationary
when
illuminated
under
an
appropriate
A.C.
light
source,
Diagram
4.
For
highly
accurate
transcription
work
where
the
slightest
speed
deviation
is
critical
it
is
desirable
to
let
the
motor
run
for
approximately
10
minutes
so
that
it
may
reach
its
normal
working
temperature.
For
such
critical
work,
speed
should
be
re-checked
on
changing
the
speed
Tange.

Diagram
4
To
protect
the
intermediate
wheel
from
damage
the
speed
change
knob
is
interlocked
with
the
on-off
knob.
To
change
the
speed
range
the
motor
must
be
switched
off
by
means
of
the
on-off
knob.
The
turntable
must
not
be
held
Stationary
with
the
motor.
switched
on
and
the
on-off
switch
on
the
motor
should
always
be
used
for
stopping.

Technical Details
‘Turntable -
Unit Plate -
Motor -
Voltage -
Frequency -
Consumption -
Wow :
Flutter :
Rumble -
Speed
Range
-
Sie -
eee
Diecast Aluminium 12” diameter
machined all over and accurately
balanced.
Weight 6 \bs. Fitted with rubber mat.
A three speed stroboscopically engraved
turntable is available at extra cost.
Diecast Aluminium.
Shaded pole induction in heavy cast
casing suspended on six tensioned
springs. Magnetically screened.
Dual Range 100 to 130 and 200 to 250
volts.
50 or 60 cycles according to motor pulley
fitted. Alternative pulley available,
16 watts maximum.
Instrumentation:—
Gaumont-Kalee Wow
Less than 0.2%. j and Flutter Meter
3000 eyel tant
sf cycle corstant
Less than 0.05%. frequency records at
334, 45 and 78 r.p.m.
Almost non existent.
32 to 34, 44 to 46 and 76 to 80 r.p.m.
approx,
High quality broken white enamel with
black accessories.
Motor Unit 144” back to front, 133” wide
24” above and 34” below under surface
of unit plate. Recommended size for
motor board 18” x 18”.
Nett. 16 lbs. Gross 20 Ibs.
iL

Maintenance
The
Turntable
Spindle,
motor
and
intermediate
wheel
bearings
being
of
the
oil
retaining
type
rarely
need
lubricating.
When
however
the
need
for
oil
is
apparent
remove
the
turntable
and
sparingly
lubricate
these
bearings
with
a
few
drops
of
the
oil
supplied
afterwards
removing
all
surplus
and
making
sure
that
no
oil
is
present
on
the
motor
pulley
or
intermediate
wheel
before
teplacing
the
turntable.
These
oiling
points
are
indicated
on
Diagram
5,
the
oil
recess
in
the
top
motor
bearing
being
accessible
through
one
of
the
three
holes
in
the
aluminium
disc
of
the
eddy
current
brake.
The
motor
must
be
in
the
switched
off
position
before
removing
or
replacing
the
turntable.
The
turntable
is
an
accurate
taper
fit
on
its
spindle
and
if
difficulty
is
experienced
in
removing
it
the
spindle
top
should
be
given
a
downward
tap
with
a
small
block
of
wood,
such
as
the
handle
of
a
screwdriver,
while
the
turntable
is
lifted.

Installation
The Garrard Model 301 Transcription Motor
should be assembled to a substantial wooden motor board
which should be cut out and drilled to the template sup-
plied with each unit or to the dimensions given on
Diagram 11: The motor should be assembled to the board,
using the rubber washers supplied, between the unit plate
and the board to prevent any distortion of the plate due
to any possible inaccuracies in the board.
Insert the screws and assemble the washers and.nuts
as indicated in Diagram 5 tightening up the nuts equally
a little at a time, then securely tightening up the lock nuts.
To protect the electric motor during transit it is
firmly clamped by means of two transit screws, Diagram 5,
These screws, the heads of which are coloured red,
must be unscrewed as far as they will go to release the
motor clamp plate which allows the motor to float freely
on
its
suspension
springs.
To
clamp
the
motor
for
transit
purposes
the
two
motor
transit
screws
should
be
tightened
up.
The pickup to be used should be mounted on the
board
according
to
the
manufacturers’
instructions.
The motor should be fixed to the motor board as
described above. This, however, may not always be
possible
due
to
the
presence
of
extraneous.
vibration
caused by shutting the cabinet lid or drawer. or. walking
across the floor on which the cabinet is standing,
In these cases, the motor board should be ‘spring
mounted in the cabinet with the spring mounting assembly
provided as illustrated on Diagram 7. The cabinet board
being as shown in Diagram 8. With the motor and turn-
table in position, there should be a gap of about 7,” to 3”
between two boards. A reduced dimension template for
this board is given in Diagram 12.
13

Diagram 7
Diagram 8
i4

On final installation the motor should be levelled
by adjusting the inner nuts of the spring suspensions,
removing the lower nut, triangular washer, and lock nut
to do so, replacing them when the unit is level.
The level should be checked by means of a spirit
level placed on a record on the turntable.
A suitable set of four spring mounting assemblies
is
supplied
with
each
transcription
motor
and
they
should
be
assembled
as
shown
on
Diagram
6.
Should
the
motor
board
be
thicker
than
}”
the
fixing
holes
should
be
recessed
1}”
diameter
from
underneath
to
bring
the
thickness
of
the
board
to
$”
from
the
top.
Before assembling the motor into the cabinet con-
nect
the
power
supply
lead,
if
not
already
fitted,
to
the
power
supply
terminal
block
situated
at
rear
of
motor,
making
sure
that
the
lead
is
securely
clamped
in
the
cord
grip
adjacent
to
the
block.
Check
that
the
voltage
range
is
set
correctly
for the
power
supply
to
be
used;
the
links
should.
be
set
as
shown
on
terminal
block
cover
and
Diagrams
9
and
10,
The
motor
pulley
should
also
be
>»
LI
>
O-7O
1
CHS
U
FOS!
Set for 100/130 volts Set for 200/250 volts
Diagram 9 Diagram 10
checked
to
see
that
the
correct
one
for
the
frequency
of
the
power
supply
is
in
position
on
the
motor,
a
nickel
finished
one for 50 cycles,
a brass
one for 60 cycles.
15

Should
the
motor
pulley
require
changing,
remove
the
pulley
on
the
motor
by
loosening
the
two
grub
screws
holding
it
to
the
shaft
and
on
fitting
the
other
pulley
check
that
it
is
in
its
correct
position
before
tightening
the
screws,
by
moving
the
intermediate
wheel
inward,
making
sure
that
the
rubber
tyre
runs
in
the
centre
of
the
appropriate
step
and
its
side
face
is
clear
of
the
pulley
step
face
by
¥,”
when
set
on
33}
or
45
r.p.m.
The
motor
should
be
earthed
by
connecting
a
lead
from
the
earthing
tag
on
the
motor,
Diagram
5,
to
a
good
earth
connection.
For
preference
three
core
power
supply
lead
should
be
used,
two
connections
being
made
to
the
power
supply
terminals
and
the
other
to
the
motor
earth-
ing
tag.
F
On
final
installation
it
is
essential
that
the
leads
from
the
motor
are
not
strained
tight
but
should
be
very
loosely
looped
so
that
the
motor
remains
freely
suspended
on
its
springs.
The
shaft
of
the
speed
range
knob
is
extended
so
that
a
standard
wafer
switch
may
be
fitted
if
required.
16

Service
Adjustments
The
Garrard
Model
301
Transcription
Motor
has
been
designed
to
give
reliable
service
with
continuous
use
and
these
instructions
have
been
included
to
enable
the
user
to
make
the
few
minor
adjustments
which
may
become
necessary
after
long
periods
of
use
in
order
to
Maintain
the
high
standard
of
performance
which
this
motor
is
capable
of
producing.
Intermediate Wheel.
The
accuracy
of
the
rubber
tyred
intermediate
wheel
is
of
supreme
importance
in
maintaining
the
high
standard
of
performance
of
the
unit
and
should
any
wow
or
flutter
be
suspected
check
the
intermediate
wheel
after
first
making.
sure
the
record
is
not
at
fault,
Flutter
or
bump
in
the
reproduction
may
be
caused
by
flats
on
the’
intermediate
wheel.
These
may
result
from
the
turntable
being
held
stationary
with
the
motor
switched
on,
for
this
reason
the
turntable
must
never
be
stopped
with
the
hand,
but
the
unit
switched
off
by
means
of
the
on-off
switch
on
the
unit
plate.
Should
the
intermediate
wheel
become
damaged
it
should
be
replaced
with
a
new
one.
Flutter
and
wow
can
also
-be
caused
by
the
side
face
of
the
rubber
tyre
on
the
intermediate
wheel
rubbing
on
the
side
of
one
of
the
motor
pulley
steps,
the
position of
the
pulley
on
the
motor
shaft
should
be
such
that
there
is
3”
clearance
between
the
side
faces
of
the
intermediate
wheel
and
motor
pulley
steps.
Wow
can
be
caused
by
oi
or
grease
on
the
motor
pulley,
intermediate
wheel
tyre
or
the
driving
surface
of
the
turntable.
In
this
case
thoroughly
clean
all
driving
surfaces
with
a
clean
rag.
Should
hum,
originating
from
the
motor,
be
sus-
pected,
see
that
the
motor
is
freely
suspended
on
its
springs
and
that
the
motor
transit
fixing
screws
Diagram
5
have
been
unscrewed.
Also
see
that
the
power
supply
and
earth
leads
are
slack
and
not
straining
the
motor
on
17

its
springs,
these
leads,
if
too
rigid,
will
transmit
the
motor
vibration
to
the
cabinet
and
so
be
reproduced.
Should
the
motor
fail
to
start
on
switching
on,
first
make.
sure
that
the
power
supply
is
reaching
the
ter-
minals
in
the
terminal
block.
If
found
to
be
correct
switch
off
at
the
power
supply
then
check
that
the
voltage
range
change
over
links
are
tight,
also
remove
the
switch
cover
and
check
that
the
switch
contact
moves
each
of
the
two
switch
blades
as
it
moves
between
them
when
switching
on.
The
switch blades
and
the
contact
should
be
thoroughly
cleaned
and
a
faint
trace
of
vaseline
placed
on
each
of
the
two
blades before
replacing
the
cover.
Should
the
motor
still
fail
to
start
check
the
circuit
of
the
coils.
The
total
resistance
should
be
460
ohms
if
set
on
the
200
to
250
volt
range
or
115
ohms
on
the
100
to
130
volt
range.
If
the
turntable
continues
to
revolve
for
several
revolutions
after
switching
off
by
means
of
the
switch
on
the
unit,
the
turntable
brake
pad
probably
needs
adjust-
ing.
To
make
this
adjustment,
remove’
the
turntable
as
described
on
page
12,
loosen
the
turntable
brake
adjusting
screw,
Diagram
5,
move
the
brake
a
small
amount
out-
ward
toward
the
rim
and
retighten
the
screw.
Make
sure
that
the
brake
is
not
set
too
far
out
because
it
can
prevent
the
switch
breaking
contact
if
so
set.
18

Spare Parts List
No. on
Diagram
Drawing
No.
AS51397
A40151
AS55967
AS51888
A.52493
AS52075
AS51802
A.40132
A.42501
A.40132
A.40458
A.40085
A.40254
51447
AS51779
AS51778
A.40768
4.40678
A41058
A.41061
A.41737
A.42520
A.41006
AS51814
AS51813
B51424
B.51206A
A.42539
A42144
4.40514
‘Name of Part
Turntable
Spindle.
Screw.
Housing
with
Bearings
A.43551.
Circlip.
Thrust Pad Assembly.
Gasket.
Thrust Plate.
Screw,
Spring
Washers.
Screw.
Screw.
Screw
Screw.
Motor
Plate
with
Speed
Plate
A.51370,
On-Off
Plate
A.51371,
Name
Plate
B.55957
and
Rivets
A.42147.
(State
colour).
Stop Pin.
Pivot Pin.
Rubber Washer.
Washer.
Nut.
Nut. +
Spring Clip.
Spring Washer.
Nut.
Knob.
Spindle,
Control Knob Speed Change,
Control Knob On-Off,
Friction Spring.
Rivet.
Washer.
19

Spare
Parts
List
—
continued
No. on
Diagram
36
Drawing
No.
A.S1854
A40055
A40519
A.50448
AS51856
A.40643
A42042
ASI851
A.52004
A41695
AA40519
A.42503
A.40014
AS51847
A.42006
AS50448
A.51850
AS51849
A.40018
A.45210
AS51843
AS51844
A42006 |
AS51841
A.47594
A40560
A41012
AS51840
AS51837
AS51836
AS51886
A43101
4.40051
Name of Part
Pad
Spring
with
Brake
Pad
A.45064
and
Spring
Clip
A.41722.
Screw.
Washer,
Collar.
Catch Lever.
Washer.
Rivet.
Brake Lever
Assembly.
Interlocking
Lever
Assembly.
Spring
fixing
to
items
40
and
43,
Washer.
Spring Washer.
Screw.
Switch
Lever,
Rivet.
Collar,
On-Off Lever.
Link
for
Switch
Lever.
Screw,
Collar.
Intermediate
Lever,
Speed
Change
Lever.
Rivet.
Link ‘A’.
Collar.
Washer.
Nut.
Link ‘B’.
Index
Lever
Assembly
with
Pin
A.43303.
Spindle.
Collars.
Grommet,
Screw.
20