Audio Database

The

Pioneer PL-30LII
69,800yen(1981 release)

Description
 
The record player system which employed the merit of the unit design efficiently as it was like the high-end model in order to pursue a tone quality.

The shell integral-type carbon graphite straight arm is adopted as a tone arm.
In the vibration analysis which uses a computer, form with few vibrations and a balance were defined theoretically, and also the tone arm which enables a more faithful transmit by the repetition of a measurement and an audition is realized.

In order to suppress the low-pass vibration generated by the curvature and decentration of a record, the silicon oil braking scheme (on-off is possible) is adopted. This is pushing the dumping knob of an arm axis upper portion, and its silicon braking fin poured into the oil cup is depressed, and it has a structure which applies viscous braking to an arm. Moreover, braking for which it was horizontally and perpendicularly suitable, respectively serves as a design applied simultaneously by cutting the leading end of a braking fin (the shape of a ring) into 45 degrees. While this suppresses a harmful low-pass vibration, cross modulation distortion is reduced.
Oil has little variation per hour and viscous transition by a temperature, and they have adopted as it the silicon oil which is excellent as braking oil. Furthermore, by storing this silicon oil in the oil cup built with high precision, oil oozes, し is prevented and the robustness is improved.

The heavy weight class arm base made from die-casting which gave the stabilizer effect is adopted as the arm base.

The coreless motor of SH and a rotor scheme is carried in the actuator.
Conventionally, it has succeeded in the sharp reduction of a wow and flutter according to the structure which moved the supporting point (bearing) of the rotor which suited the motor bottom to immediately under the turntable, and the coreless structure which an cogging does not generate theoretically.
Starting torque has realized stability which does not cause a load variation to the 200g load intensity equivalent to 2.0g of stylus-forces tone arm 100 duty by combining the turntable which is 1.3 kg-cm and also has an inertial mass of 330 kg-cm2 (turntable sheet included).
Moreover, three hall devices with a high robustness which Pioneer developed are used for the magnetic pole change (switching) organization of a motor. Furthermore, the detailed noise is banished by searching for the manipulation precision of micra order until it results in the part of a detail.

The silence lift up organization in which the quiet and exact operation was realized is adopted.
The moving coil scheme adapting the principle of operation of the speaker is adopted as the elevation organization in which an arm is made to go up and down first, and a uncontacted operation is carried out to it on DC voltage.
Furthermore, the hall device attached to the interior of an arm axis and the scheme which performs a uncontacted detection with the magnet countered and attached to this are adopted as a termination location detection of a record sound track, and the operation stabilized without spoiling the performance of an arm is realized to it.
A silence lift up organization is interlocked with and the pure electronic quick stop organization in which a turntable is stopped in an instant is carried.

The high-density cabinet which controls effectively the deflection of the cabinet by anti-energy action of the angular moment of the torque[ a high inertia and / high ]-ized turntable is adopted as a cabinet.
Moreover, it has a structure strong also against the oscillation from the outside by adopting the large-sized insulator of an original low centroid structure as an insulator.

It is possible to adjust oil braking with the level to 0-5 like high-end model PL-70LII and PL-50LII by using an optional dumping coordination adapter.

S character type switching arm pipe (with a large-sized wait) in which a switching of a head shell can be performed easily is attached.
Moreover, the option also of the shell integral-type straight arm pipe of carbon graphite is carried out.

The
S SH

Rating of a mode
Form Cartridgeless player system
<Phone motor part>
Motor Coreless Quartz PLL DC servo hall motor
Drive system Direct-drive
Bearing structure SH and a rotor scheme
Turntable diameter 31cm
Turntable inertial mass 330kg-cm2 (turntable sheet included)
Rotational frequency 33 1 / 3 or 45rpm
Rotational frequency change The electronic formula by a short stroke switchpoint
Rotation unevenness 0.011% or less (WRMS/FG Direct-reading method)
0.023% or less (WRMS/Japanese Industrial Standard)
S/N 82dB or more (DIN-B)
63dB or more (Japanese Industrial Standard)
Load variation 0% (less than 200g of stylus forces)
Startup property Less than 1/3 rotation
Starting torque 1.3kg-cm
Velocity detection scheme Perimeter integrator type FG
Rotational frequency deflection 0.002% or less
Drift Time drift : 0.00008%/h
Temperature drift : 0.00003%/degree C
Braking mechanism Pure electronic formula
<Tone arm part>
Form Oil braking scheme static balance twin pipe exchange system pipe arm
Effective length 250mm
Overhang 12mm
Tracking error + 2.7 degrees-1.3 degrees
Stylus-force coordination 1g of wait 1 rotations
Conformity cartridge self-weight Straight: 3g - 11g
S character type: 6g - 32g (shell lump)
Height adjustable range +3 -4mm
Head shell Carbon fiber composite material
<Synthesis>
An attached organization Quartz locking-in Decatur
Quick stop
Silence lift up (electronic formula)
The semiconductor used etc. Quartz crystal: One
IC:10
Hall device: Three
LED:4
Transistor: 11
Diode: Six
Power source AC100V, 50Hz/60Hz
Power consumption 13W
Dimensions Width 490x height 180x depth of 401mm
Weight 11.8kg
Option Dumping coordination adapter JP-506 (8,500yen)
Shell integral-type straight arm JP-515 (7,000yen)