Hitachi HT-550 - Page 8

FEATURES
1.
10.
Uni-torque motor
The
model
adopts
a
Uni-torque
motor
which
is
an
improved
version
of
HITACH!'s
original
Uni-torque
motor
characterized
by
its
silent
and
smooth
rotation
due
to
the
theoretically
uniform
torque
generated.
Develop-
ment
of
precision
magnetic
attraction
techniques
has
brought
about
improvements
in
the
accuracy
of
the
speed
detection
and
the
response
characteristics,
and
achieved
a
superb
signal-to-noise
ratio
and
wow/flutter.
. Quartz control (quartz lock PLL servo)
The phase of the oscillation frequency which is always constant and generated by the quartz oscillator and of
the detection frequency from the speed detection unit are compared, and by controlling the revolution speed,
the load. characteristics and revolution speed accuracy are enhanced. This circuit employs a one-chip MOS LSI
for improved circuit reliability.
. Large-sized, heavyweight platter
By adopting a large-sized, heavyweight platter with a high flywheel effect, the transient load variations during
record play are reduced and the reproduced sound is given excellent rise characteristics.
. High-sensitivity, precision-engineered tonearm
The model incorporates a high-sensitivity, precision-engineered tonearm which employs high-precision bearings,
and this allows the stylus to trace the sound grooves reliably.
. Cartridge with elliptical stylus
The cartridge is provided with a 10 x 18 w (0.4 x 0.7 mil) elliptical diamond stylus for reliable tracing of the
sound grooves. (According to the sales area, some models do not come with a cartridge.)
. Howl-immune construction
The vibration-proof legs which feature an air suspension system displaying excellent vibration cut-off charac-
teristics and the bottom board with its high specific gravity, high internal loss and immunity to resonance
make for a construction which is immune to howl.
. Handy automatic mechanism
When a record has been played and the auto cut lever has been operated during play, the tonearm automati-
cally returns to the arm rest and the platter will stop.
. Easy-to-see single-pattern strobo
The strobo lamp lights up using the oscillation frequency of the quartz oscillator which means that the model’s
single-pattern strobo is not related at all to the revolution speed and frequency of the power line.
. Viscous damped arm lifter never damages stylus tip
By using the viscous damped arm lifter for lifting/lowering the stylus, there is little danger of damaging the
record or stylus tip.
Easily removable dust cover
The dust cover can be detached when using in a narrow place such as on a shelf, etc.
Derek
Open the package and take out the platter care-
fully. Be sure to remove al! the components from
(A cartridge may or may not be provided
depending on the destination.)
packaging. (See Fig. 1)
1. Take out the platter and platter mat packed
separately: insert the platter into the record © Piatter
guide and fit the platter mat on it. @® Platter mat
shell into the tip of the tonearm and fix it
with a locking nut.
. Place the balance weight, which is packed @ Record guide
separately, into the rear of tonearm while @® Balance weight
turning
it
counterclockwise.
@
Tone
arm
. When a cartridge is not attached, install your @ Cartridge
cartridge to the head shell. Insert the head © Head shell
® Locking nut
When you do not intend to use your model, secure the tonearm to the arm rest. If the tonearm is disen-
gaged from the arm rest, the power will automatically come on.