Garrard 301 Service Manual

Page 1

MANUAL
. for the

GARRARD MODEL 301

TRANSCRIPTION
MOTOR

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THE GARRARD MODEL 301 TRANSCRIPTION MOTOR '

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Description

THE Garrard Model .301 Transcription Metor
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 '
theon-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 toibeobtained.

Great attention has been given to details
appreciated by the connorsseur such as a sup-
pressor unit to avoid switch clicks a heavy
turntable diecast in aluminium_- and accurately
balanced, arobust hardened and super finishedmmr
table spindle, a fully retracting intermediate wheel

and a brake to reduce the free revolutions of the
turntable on switching ofl. ,

The unit is supplied complete With strobe-
scope, record adaptor for 7 large hate recordsand
clip, a bottle of special oil, all fixing screws, set of
spring snapensions, template, manual. and test report.

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(3) Switch 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
range.

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Technical Details

Iomtab'le

Unit Me
Mom!

Flutter

Rumble
Speed Range

Diecast Aluminium 12" diameter
machined all over and accurately
balanced.

Weight 6 lbs. Fitted with rubber mat.
A three speed strobosc0pically 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:-
Gaumonthalee Wow

Less than 0.2%.; and Flutter Meter

Type 564.
3 000 cycle constant

Less than 0.05%. frequency records at
33}. 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 14% back to front. 13$"wide
2} above and 3% below under surface
of unit plate. Recommended size for
motor board 18 x 18.

Nett. 161bs. Gross 20 lbs.

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