||PL-50: 80,000yen(around the 1980 time)
|PL-50L:85,000yen(around the 1980 time)
The record player which inherited the technology
cultivated by PL-70 which is a high-end model, and applied the polish to the
Usually, there were two kinds, PL-50 of a version and PL-50L
which carries the newly developed moving coil scheme silence lift up
having adopted SH and the rotor scheme motor made to move
the supporting point (bearing) of the rotor which suited the motor bottom
immediately under a turntable, in order to investigate the threshold of a
rotation precision -- thereby -- the centroid of a motor, and the location of
the supporting point -- about -- it has succeeded in making it do one.
this reason, the reverse cone motion which uses as the supporting point the
motor shaft bottom where the location of a centroid and the supporting point
happens by the slight path clearance between a motor shaft and a bearing which
was not able to be prevented with a structure conventionally which had shifted
sharply was canceled, and the outstanding rotation property is secured.
Furthermore, in order that the needle point may banish the load variation
produced by the resistor received from a record sound track, the large-sized
turntable with a diameter [ with the Quartz PLL DC servo hall motor of starting
torque 1.6 kg-cm and the inertial mass of 330 kg-cm2 ] of 31cm is
And the detailed noise is banished by finishing in the manipulation
precision of micra order until it is using three hall devices in which Pioneer
did the process development for the magnetic pole change organization of a
motor, in addition results in the part of a detail.
vibration proof agent is applied to the rear view of a turntable. The resonance
which has an ill effect on a tone quality by this is prevented.
to realize banishment and the high sensitivity of a low-pass vibration
simultaneously, the silicon oil braking scheme tone arm (on/off is possible) is
This sinks a braking fin (the shape of a ring) into the silicon oil
poured into the oil cup of the arm axis upper portion, and it is a structure to
which a dumping is applied, and it is designed so that braking for which it was
horizontally and perpendicularly suitable by moreover cutting the leading end of
a fin into 45 degrees, respectively may be applied simultaneously.
synergistic effect with the mass centralization system which had attained
flat-ization of the mechanical impedance of a tone arm, and also brought the
main wait of the arm close to an axis of revolution while reducing Q (the degree
of 共振鋭) of the low-pass vibration by this,Cross modulation distortion has been
improved sharply and clear play sound is realized covering a total audio
The heavy weight class arm base made from die-casting which gave the stabilizer
effect to the arm base is adopted, an arm is fixed firmly, and the partial
vibration is suppressed.
250mm of effective
lengths' long type arm is adopted as an arm.
The high-density cabinet
which combined native wood (marble ebony finish) and the solid board of the
four-layers laminating is adopted as a cabinet, and the deflection of the
cabinet by the reaction of the angular moment of a high torque motor is
prevented especially effectively.
Moreover, the newly developed low centroid
structure insulator was carried in the insulator, and the stability which was
excellent to oscillations from the outside, such as a howling, has been
By using an optional dumping coordination adapter, it becomes
a braking level good transformation arm like PL-70, and the amount coordination
of braking according to the compliance of the cartridge is possible.
Moreover, when equipping with the heavy cartridges (alt. phone SPU-GT type
etc.) of a self-weight, the optional switching wait using is recommended.
In PL-50L, the silence lift up organization out of which mechanism sound
does not come is carried.
This is what adopted the moving coil scheme which
applied the principle of operation of the speaker to the elevation organization
which goes up and down an arm, and serves as a scheme which carries out a
uncontacted operation on DC voltage.
Moreover, the scheme which performs a
uncontacted detection with the hall device and magnet inside an arm axis is
adopted as a termination location detection of a record sound track, there is no
occurrence of side pressure in it, and the sensitivity of an arm is not spoiled.
||Cartridgeless player system
|<Phone motor part>
||Quartz PLL DC servo hall motor
||SH and a rotor scheme
|Turntable inertial mass
||330kg-cm2 (turntable sheet
||33 1 / 3 or 45rpm
|Rotational frequency change
||The electronic formula by a short stroke
||0.012% or less (PL-50L, WRMS/FG
0.013% or less (PL-50, WRMS/FG Direct-reading method)
0.023% or less (WRMS/Japanese Industrial Standard)
||78dB or more (DIN-B)
65dB or more
(Japanese Industrial Standard)
||0% (less than 200g of stylus forces)
||Less than 1/3 rotation
|Velocity detection scheme
||Perimeter integrator type FG
|Rotational frequency deflection
||0.002% or less
||Time drift : 0.00008%/h
drift : 0.00003%/degree C
||Pure electronic formula
|<Tone arm part>
||Oil braking scheme static balance S
character type pipe arm
||+ 2.1 degrees-1.2 degrees
||1g (0.1g tick mark) of wait 1 rotations
|Conformity cartridge self-weight
||4g-13g (at the time of an attached shell
|Height adjustable range
||An aluminum impact press head shell, 10.5g
|An attached organization
||Quartz locking-in Decatur
Silence lift up (only an electronic formula and PL-50L)
|The semiconductor used etc.
||Quartz crystal: One
device: Four (PL-50 is 3)
light-emitting-diode: Four (PL-50 is 3)
||Width 490x height 190x depth of 401mm
||Dumping coordination adapter JP-506 (8,500yen)
Switching wait JP-507 (2,400yen)