SONY PS-X60
¥ 62,800 (around 1979)
Commentary
This is a full-auto-player system equipped with a full-auto mechanism that pursues safety and usability based on the concept of human auto-mechanics.
Equipped with a simple linear BSL (slotless) motor that does not require a brush or slot. By eliminating slots that cause cogging, torque unevenness is minimized and smooth and quiet rotation is realized.
In addition, high torque is obtained due to high efficiency, and reliability and durability are also improved.
The velocity detection section of the servo system employs a Magne-disk velocity detection method developed using precision measurement technology of the Sony Magne-scale. Magnetic material is coated on the inner wall of the outer circumference of the turntable with a wide rotating area, and 512 wave detection signals are magnetized. The average value of these signals is detected by a multi-gap head, and control commands are sent to the servo system.
Since this method has a high signal frequency of approximately 284 Hz at 33 1/3rpm, servo compensation can be performed up to relatively high frequencies of the flutter components.
In addition, the speed servo circuit uses a crystal lock with a crystal oscillation phase control circuit. By phase-locking the detected signal, not only initial drift due to self-heating of the main body, but also rotational speed deviation due to voltage fluctuation due to self-heating and rotational speed drop due to needle pressure load are reduced, resulting in excellent rotational characteristics.
In order to prevent lateral pressure from being applied to the needle tip when the tone arm returns, an electronic record end detection type Luminous sensor is used.
In addition, an arm limiter mechanism is adopted to protect the mechanism by separating the auto mechanism when a force larger than the driving force is applied to the tone arm.
The cartridge is equipped with MM type cartridge XL-25A.
The neck cylinder part, which is the joint part between the head shell and the arm pipe, holds the tip of the shell plug against the slope facing the bottom of the neck cylinder with a strong force due to the wedge effect. In addition, the locking nut is pushed forward by the reaction, and the root of the shell plug is tightened firmly from 4 directions.
As a result, two parts of the front and back are held in a ring shape by one operation, preventing mounting looseness.
The arm pipe is made of a special aluminum alloy with greatly increased rigidity, and by adopting a J-shape with high bending strength, rigidity approximately 8 times that of conventional aluminum pipe is obtained.
In addition, by adopting an integrated structure from the neck cylinder section to the bearing section, unnecessary joints are eliminated and resonance factors caused by joint looseness are eliminated.
The bearings use a Longs pan bearing shaft supported by a single straight shaft to prevent play caused by ball bearings. This minimizes movement at the operating point.
In addition, a tapered mirror finish of hardened cemented carbide with a diameter of 5 mm is used for the pivot shaft to improve contact with precision radial bearings and provide high rigidity support.
The SBMC is used for the cabinet because internal loss is larger than metal and the structure with high precision and strength can be easily obtained.
It uses a large insulator filled with gel-like high-viscoelastic material in a rubber cup.
The height of this insulator can be adjusted to keep the cabinet horizontal, and the center of gravity is lowered to further improve stability.
Uses low-capacity cord with gold-plated terminal.
Model Rating
| Type | Crystal Lock D. D. Full Auto Player System |
| <Turntable portion> | |
| Turntable | 32 cm Aluminum Die Cast 2.2 kg (Including Rubber Sheet) |
| Wow and flutter | 0.025%wrms |
| Load characteristic | 0% (Needle Pressure 150g) |
| Start-up characteristic | Within 1/2 Rotation (at 33 1/3rpm) |
| Drift time | 0.0003% / h or less |
| Signal-to-noise ratio | 75dB(DIN-B) |
| Tone Arm Section | |
| Effective length | 235mm |
| Total Length | 330mm |
| Arm Height Adjustment Range | + / - 3 mm |
| Needle pressure adjustment range | 0 ~ 2.5g (0.1g Interval) |
| Shell dead weight | 11.0g(SH-155) |
| Usable cartridge weight limit (including shell weight) |
11.0 ~ 19.5g 19.0g ~ 27.5g (Auxiliary Weight Used) |
| Cartridge Section | |
| Cartridge | MM Type (XL-25A) |
| Frequency characteristic | 10 Hz to 30 kHz |
| Output voltage | 4 mv (1 khz, 5cm/s, 45 °) |
| Needle | 0.3x0.8 mil Diamond Oval Needle |
| Dead weight | 5.2g |
| <General> | |
| External dimensions | Width 480x Height 165x Depth 420 mm |
| Weight | Approx. 12 kg |
| Attachment | 45 Rotation Adapter Auxiliary weight Head Shell (SH-155) Set of cartridge mounting screws |