Dual 1216 Instrucciones De Manejo página 12

to the choosen speed will appear to stand still
when the turntable is rotating at the correct
speed,
ig. 21
Pitch is varied by using the pitch-control
knob O.
Adapting for other power frequency
To adapt the unit for use at a different
power-line frequency is accomplished by
changing the motor pulley (A), which is
secured to the motor shaft by a screw and
can be reached by removing the turntable
platter,
Fig. 22
Caution: Handle the motor pulley carefully.
A bent pulley causes rumble,
Stock numbers for motor pulleys:
For 60 Hz, No, 220 971
for 50 Hz, No, 220 970
Removing the turntable platter
The platter is secured by a C-ring seated
in a notch on the turntable shaft. Use a
screwdriver to remove the C-ring, then lift
off the platter,
12
Fig. 23
Important: When handling the platter avoid
touching the inner surfaces with your fingers
as skin oils can cause slippage (and resulting
pitch deviation) between the idler wheel
and the driving rim of the platter,
Adjus'
g tonearm set-down position
With automatic start, the stylus descends
automatically into the outer groove of the
record, It is possible, due to peculiarities
in the mounting of a cartridge, that the
stylus may land too far in or too far out
on the record.
a =
Fig. 24
In that case, set the record size selector
for a 12" record (30 cm), Through the hole
next to the tonearm rest, you will see an
adjustment screw (2, If the stylus lands too
far into the record, turn the screw slightly
to the left; if it lands too close to the edge,
turn it slightly to the right
Service
All parts that require lubrication are liberally
coated with oil. Under normal conditions,
your Dual will function perfectly for years,
Do not oil any parts; special oils must be
used, Should your Dual ever require service,
either take it to your dealer or ask him for
the address of the nearest authorized Dual
service agency. Be sure that original Dual
replacement parts only are used, Always ship
your Dual in its original packing.
Technical data
Power supply:
alternating, 50 or 60 cycle
changeable by changing motor pulley
Power supply voltage
110/117 and 220/240 V, switchable
Drive:
4-pole asynchronous pole motor with
radialelastic suspension
Power consumption:
10 watts
Current drain:
64 ma approx, at 220 V, 50 cycle
115 ma approx, at 117 V, 60 cycle
Turntable platter:
weighing 3.2 Ibs. or 4 Ibs., dia 10 5/8 inch,
Turntable speeds:
33 1/3, 45 and 78 r.p.m.
Pitch control variation:
adjustment range of approx. 1 semitone
(6 %) at all three turntable speeds
Speed accuracy deviation: to DIN 45 500
<0.12 % with platter 4 Ibs,
<0.15 % with platter 3.2 Ibs,
Rumble:
= 35 dB below signal level in accordance
to DIN 45 500
Weighted rumbli
= 55 dB below signal level in accordance
to DIN 45 500
Tonearm:
torsionally rigid, aluminium tubular tonearm
with vertical needle bearings,
horizontal 2-layer precision ball bearings in
hardened and polished races,
Maximum tracl
0.18%/cm
g error:
Tonearm bearing frictions:
(referred to stylus tip)
vertical less than 0.01 gram
horizontal less than 0,04 gram
Cartridge holder:
removable, suitable for acceptance of
cartridges having 1/2 mounting and
possessing a weight of 1 - 8 grams,
Weight:
aprox, 10.6 Ibs. with platter 4 Ibs,
aprox. 9.7 lbs. with platter 3.2 Ibs.
imensions:
127/8 (+1 1/32 inch tonearm overhang)
x 10 3/4 inch