|200,000yen(around the 1980 time)
The linear tracking player which solved the hangup
which had become a neck by developing and carrying a linear D.D> arm until
The linear D.D. arm on which Pioneer developed it newly in order to
carry out horizontal displacement of the firm arm base precisely and calmly is
carried, and the factor which gives a harmful noise and oscillation by this is
put into practice and eliminated.
Since the linear D.D. arm can change the
magnetic-repulsion power by electrical energy to a translatory movement as it
is,It has become structural very simple, and differs from an old scheme
fundamentally, and a rotary motor is begun, a toothed gear, a belt, thread, or
propagation organizations, such as け, can also be unnecessary at all, and the arm base can be driven direct.
In order to make the arm base certainly
follow in accordance with the amount of migrations of the needle point which
traces a record sound track, the arm deviation detection organization in which
it does not contact [ which combined cds and a lamp with the arm installment
part ] is adopted. By applying this detection output to the differential
amplifier, the servo system which supplies a required quantity of an electric
current is constituted.
And since this arm deviation detection angle is a
minute angle of 0.2 degree, a quick correction is possible,Furthermore, in order
to carry out a response correction correctly also not only to the orientation of
record inner circumference but to the orientation of the perimeter, even if an
arm deviation detection organization makes a record with eccentricity trace, it
does not have a care of unnecessary side pressure being applied to the needle
point, and demonstrates high trackability.
With a linear D.D. arm, a
bothways servo system is used with the Output voltage of the generator
interlocked with the part of revolving arm delivery, and smooth arm delivery can
According to the orientation and velocity which touch an arm
delivery knob with a finger lightly, and turn it to it and which are been [ a
velocity / it ] sufficient and rotated, an arm moves an operation, and the feel
of a fingertip becomes an arm movement as it is. For this reason, a needle is
taken down from the middle of a record and a performance can be started freely.
Since this arm delivery organization serves as a safety design which is not
committed during a record performance, there is no care of damaging the needle
point and a record accidentally.
Moreover, since an arm deviation detection
organization and a bothways servo work automatically and move the arm base by
moving to right and left with the finger hook of an arm, the same operation is
possible with the same sensation as a manual player.
straight arm is adopted as an arm.
Since it is the effective length's short short type, while the inertial
mass of an arm becomes small, an equivalent mass is also reduced and trackability
The material was
an aluminum alloy with a high intensity, since it had not performed the bending
manipulation, its distortion inside a pipe decreased, and it has controlled the
Stylus-force impression has adopted the dynamic balance
Moreover, it is a universal arm and equipping with various
cartridges in the world is possible.
The 1.4kg arm base which gave
sufficient intensity is adopted as the arm base.
The arm height adjustment mechanism is adopted and a proper vertical tracking
angle is obtained in accordance with the cartridge to be used.
SH and the rotor (Stable
Hanging Rotor) scheme which moved the supporting point (bearing) of the rotor to
immediately under the turntable are adopted as an actuator.
The location of
a centroid and the supporting point is coincided mostly by this, and it is
stopping with [ of the turntable ] ふ.
The high torque brushless DC servo
motor which carries out the constant-speed drive of the turntable of
inertial-mass 380 kg-cm2 within 1/4 rotation (about 1 second) is
adopted as a motor, and it has become the design which does not cause a
rotational frequency variation to the load intensity of tone arm about 150
duties of 1.5g of stylus forces.
The high-density needle-leaf tree
particle board which took the measures against a howling was adopted as the
cabinet, and the large-sized insulator which can be height adjusted up to 6mm is
adopted as an insulator.
It is possible to have adopted the electronic
arm elevation organization which adopted the exclusive DC motor, and to make an
arm go up and down smoothly.
Furthermore, a turntable is also promptly
stopped at the same time it also carries the electronic auto up organization in
which an arm is immediately floated from the face of a board and an arm carries
out an auto up after the termination of a record performance.
pressure is not applied to the needle point for no contacting type.
high oxygen-free-high-conductivity-copper line of conductivity is adopted as all
the cables of a signal transmission system.
Furthermore, the output jack and
the terminal pin have plated with gold.
The acrylic cover of 5mm
thickness is carried.
It is attached in the high-order-accuracy
large-sized level of 7.7x7.7 which can plan the degree of level of a cabinet.
||Linear-tracking record player
|<Phone motor part>
||Quartz PLL DC servo hall motor
||Quartz PLL direct-drive
||SH and a rotor scheme
|Turntable inertial mass
||33 1 / 3 or 45rpm
||0.01% or less (WRMS/FG Direct-reading
0.018% or less (WRMS/Japanese Industrial Standard)
||78dB or more (DIN-B)
65dB or more
(Japanese Industrial Standard)
||0% (220g or less of stylus forces)
||Less than 1/4 rotation
|Rotational frequency deflection
||0.002% or less
||Time drift : 0.00008%/h or less
Temperature drift : 0.00003%/degree C or less
||Pure electronic formula
|<Tone arm part>
||Dynamic balance scheme linear tracking arm
||Linear motor direct-drive
|Conformity cartridge self-weight
||4g-24g (wait exchange system)
|Height adjustable range
|An attached organization
||Quick play (arm interlock)
Arm height coordination
Arm elevation (exclusive
Manual arm delivery organization
Chuck type joint (head
|The semiconductor used etc.
Hall device: Three
Quartz crystal: One
||Width 530x height 210x depth of 502mm