|99,800yen(around the 1980 time)
It is the linear tracking system full auto player which inherited the technology
of LT-1 and was developed.
The arm has adopted
the linear tracking system which carries out straight line movement of the
record board top like a cutting machine. By this system, since the tangential
adjusting of a sound track is traced correctly, a tracking error and
higher-harmonic-wave distortion can be decreased. Moreover, since there is no
generating of an inside force, on the whole, improvement in tracking capability
can be aimed at by object contact of the needle point being attained.
stainless steel wire is adopted as the drive of the move base which fixes a tone arm. This wire united a thin line 0.05mm in diameter from 49, it is performing
nylon coating, and it has secured pliability while it acquires the outstanding
About the tracking error, the potential difference of two
photo-diode outputs of arm back has detected, and the error angle is suppressed
to 0.03 degree - 0.05 degree.
about the vibration accompanying arm base
movement, it extracts to two points of stopping vibration which boils and is
generated at the move base of an arm to the minimum, and carrying-out-work which
does not tell the minimum vibration that occurred at move base in the 2nd to the
needle point 、, and is stopping thoroughly.
Then, before being in charge of
a design, the mechanism of a move base is modeled, an equation of motion is
stood, computer simulation for optimization is performed about the value each
component of whose is still more nearly actual, and the concrete design is
performed. Furthermore, based on impact center theory, it has determined
carefully also about the position of the point driving [ optimal ], and the
position of an arm fulcrum.
The electronic-control full auto mechanism
is adopted. Thereby, it is controllable only by pushing a manual operation
button in operation of all the tone arms. One chip LSI is adopted as a circuit
and the quick exact reaction is realized.
The record size automatic
detection mechanism by application of an optical system is adopted.
system, light is glared from the slanting upper part with a reflector, and it
has the structure of leading light to a sensor from the reflector for turntable
sheets. According to the size of a record, irradiation/interception of this
light are done, and it changes the output of a sensor. This output is sent to a
logic circuit and record size is detected automatically.
Based on this
detected record size, a needle descent position and a rotating speed are
Since it is operating carrying the quick
response function and always detecting the state of an arm lifter or an arm, it
is possible to carry out auto operation from every position. Thereby, in auto
operation, during a rise, also in /descent, if an arm directs the following new
operation with a button, it will shift to the operation immediately.
feather touch type which uses a microswitch is adopted as button operation.
The muting mechanism which cuts a noise is carried.
In order to
suppress a vibration of a tone arm, the weight case and the anti Resonance
filter which added the butyl rubber damper are adopted as the structure by a
needle pressure knob and main weight. Moreover, by extending the span of a
pivot, ガタ of the pipe part was lost and perpendicularity and a horizontal
direction have realized high sensitivity.
Stainless steel is adopted as
the quality of the material of a tone arm.
OFC (non-oxygen conducting
wire) which gave special covering is used for the conducting wire in an arm, and
head shell conducting wire.
Different-species metal double structure is
adopted as a turntable. It is what laid the stainless steel plate on top of the
turntable of aluminum die casting, when vibration occurs on a turntable, a slip
arises between two metal, and this is attenuated by making vibrational energy
The Quartz PLL system which controls the number of rotations of
a motor by the standard signal of a crystal oscillator is adopted as the drive
of a turntable.
Moreover, the high torque DC servo motor of the bearing
mechanism finished precisely is adopted as a drive motor.
has structure which fixed wooden boards to die casting.
||Full auto player
||8 pole Quartz PLL and a DC servo motor
||The product made from 312mm aluminum alloy
die casting, 1.5kg
|Number of rotations
||33 1 / 3 or 45rpm
|Number-of-rotations change system
||Electronic formula (it is a manual change at
the time of irregular number of rotations)
|Wow and flutter
0.025%WRMS (value of only a
|<Tone arm part>
||Static balance, universal straight pipe type
|Tracking error angle
||±0.05 degree or less
|Needle pressure adjustment
||0-3g Direct-reading type (0.1g step)
||The product made from a Magnesium alloy,
|Cartridge attachment weight range
16g-20g (at the time of sub-wait
||Width 485x height 177x depth of 413mm
45 rotation adapter