Dual 1229 Q Service Manual

Dual
Edition June 1974
Technical specifications
Power source
Line voltages
Drive
Power consumption
Current consumption
Dual 1229
Service Manual
50 or 60 Hz alternating current, selected by exchanging motor pulley and resetting strobos-
cope
110— 130 volts or 220 — 240 volts, svvitchable
Dual synchronous/continuous-pole motor, with radial elastic suspension
approx. 10W
at 220 volts, 50 Hz approx. 62 mA
at 117 volts, 60 Hz approx. 115 mA
Turntable platter nonmagnetic, dynamically balanced, weight 3.1 kg, diam. 305 mm
Turntable speeds 33 1/3,45 and 78 rpm
Pitch control Range of variation, one semitone (6%), on all three speeds
Stroboscope For 33 1/3 and 45 rpm speeds. I Iluminated by special neon glow lamp
Speed variation
< ± 0.06% according to DIN 45 507
Noise Rumble 42 dB below standard signal
Measured according to DIN 45 500
Weighted audible rumble 63 dB below standard signal
Tonearm Torsionally rigid, extra-long tubular tonearm in four-point gimbal type bearing
Maximum tracking error 0.16°/cm
Tonearm bearing friction
vertical < 0.007 gram
(referred to stylus tip) horizontal < 0.015 gram
Tonearm head
Removable, accepts all cartridges weighing 2 to 10 grams and having standard 1/2" moun-
(cartridge holder) ting centers
Weight 7.2 kg unpacked
Mounting dimensions and mounting
board cut-out see installation instructions
Dual Gebrüder SteldInger • 7742 St. GeorgenISchwarzwald