Dual 522 Service Manual

Service Manual
Technical data
Current
Line Voltage
Drive
Power consumption
Starting Time
Power Consumption
Platter
Platter speeds
Pitch Control Variation
Speed control monitoring
Sensitivity of the strobe for 0.1 %
speed deviation
Total VVow and Flutter
Rumble
(according to DIN 45 500)
Tonearm
Effective Length of Tonearm
Offset Angle
Tangential Tracking Error
Tonearm Bearing Friction
(related to stylus tip)
Stylus Pressure
Cartridges
VVeight
Measured values = typical values.
Rumble and wow and flutter values obtained with test record.
AC 50 or 60 Hz, changeable by changing motor pulley
115 or 230 V, changeable
Dual 16-pole synchronous motor: flat belt for flywheel drive
approx. 8 watts
(to each nominal speed) approx. 2 seconds at 33 1/3 rpm
at 220 V, 50 Hz: approx. 75 mA
at 117 V, 60 Hz: approx. 140 mA
Non-magnetic, detachable, 1 kg, 304 mm 0
33 1/3 and 45 rpm
at both platter speeds
Adjustment range at 33 1/3 rpm approx. 1 semitone (6%)
with stroboscope for platter speeds 33 1/3 and 45 rpm,
adjustable to 50 or 60 Hz.
6
division markings per minute at 50 Hz,
7.2 division markings per minute at 60 Hz.
DIN ± 0.07 %
WRMS
± 0.04 %
Unweighted 48 dB
Weighted 70 dB
Torsion-resistant tubular aluminium tonearm in four-point gimbal bearing
221 mm
24° 4'
0.160/cm
vertical 0.07 mN (0.007 g)
horizontal 0.15 mN (0.0159)
from 0 — 30 mN (0 —3 g) infinitely variable with 1 mN (1/109) calibrations
from 0 — 15 mN (0 — 1.5 g) operable from 5 mN (0.59) stylus pressure up
with 1/2 inch screw-type attachment. These can be fitted with the special
accessories no. 262 186 which can be obtained from trade dealers.
4.1 kg
Dual
522
Edition January 1980
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