Technics
SL-1800 Direct Drive Turntable
The
SL-1800 features full Technics uncompromised direct drive performance in a
simple, straightforward package. The centre ofthis sleek,attractive unit is its
highly accurate One Chip IC controlled B.FG servo DC motor. This direct drive
motor, which incorporates all of the design features of all Technics fine dd
motors, is controlled by the unique B.FG (Back-Electromotive-Force Frequency
Generator) system which utilizes the back electromotive force induced by the
rotor in the stator field coils to monitor yhe platter speed. The frequency
generator uses the waveform obtained as its reference and it is compared with
the standard calibration frequency from the reference oscillator. In this way ,
a signal to correct the speed can be sent instantly whenever needed to change
the motor drive current in order to maintain precise platter speed.
This B.FG
principle greatly improves speed stability and gives a shorter build-up time.
It also maintains the platter speed under varying oad conditions. The above
mentioned control circuitry is all contained in a fantastic One Chip IC which
can perform the functions of up to 321 separate elements such as transistors,
diodes and resistors. The sum of all this electronic and mechanical advancement
is performance, the kind of super performance that produces the low wow and
flutter figure for SL-1800 of only 0,025% (WRMS), a figure almost unsurpassed
by any other turntable anywhere. Rumble is -73 dB (DIN B). Another outstanding
feature of the SL-1800 is the Floating Double Isolator. This new advance fights
against acoustic feedback by shielding the turntable and tonearm assembly from
all outside vibrations with two separate isolators constructerd of metal
springs and special vibration absorbing material.
Additional features of the SL-1800 are a
fine-scale direct reading anti-skating device, an illuminated stroboscope,
independent pitch controls variable by up to 10%, sensitive gimbal suspension
tonearm, viscous-damping cue arm, and detachable dust cover.
Specifications
SL-1800
Turntable
Section
Type: Direct drive turntable, manual
Motor: Electronically controlled brushless DC motor
Turntable
Platter: Aluminum diecast , 330 mm
(13") diameter
Turntable
Speeds: 33-1/3 and 45 rpm
Speed Change
Method: Electronic change
Variable
Pitch Controls: Individual adjustment
controls, 10% adjustment range
Wow and
Flutter : 0,025% WRMS (JIS C5521) ±0,035% weighted, zero to peak (DIN 45507)
Rumble: -50 dB (DIN 45539 A); -73 dB (DIN 45539B)
Tonearm
Section
Type: Universal S-shaped tubular arm,
static-balanced type, direct-reading tracking force adjustment, with
anti-skating force control device, oil-damped cueing device
Effective
Arm lenght: 230 mm (9-1/16")
Overhang: 15 mm (19/32")
Friction: 7 mg (horizontally and vertically)
Effective
Mass: 22 g (6,0 g cartridge weight, 1,75
g stylus pressure)
Tracking
Error Angle: Within +3° (at the point of
14,5 cm or 5-45/64" record); +1°
(at the point of 5,5 cm or 3-2/16" from the centre)
Offset
Angle: 21,5°
Adjustable
Tracking Force: 0 - 3 g (direct-reading)
Cartridge
Range: 5 - 11 g
Headshell
Weight: 9,5 g
General
Power
Supply: AC 120 V - 240 V, 50/60 Hz
Power
Consumption: 5 W
Dimensions
(H x W x D): 125 x 453 x 369 mm (
4-15/16" x 17-12/16" x 14-9/16")
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