Pioneer PL-1200A
¥ 51,000 (around 1974)
Commentary
A record player with a direct drive system.
The drive motor is a direct-drive brushless DC servo motor that directly drives the turntable.
We also use a brushless DC servo system that automatically controls the number of revolutions using an electronic circuit composed of transistors and diodes.
The trace ability of the tone arm section is improved by examining the shape and material of the bearing section, which greatly affects the sensitivity, and the accuracy is further improved by the adoption of the perforated lightweight shell.
A unique anti-skating mechanism combining a spring and a cam is used to cancel the inside force. In addition, the needle pressure scale value directly indicates the anti-skating bias value, which can be adjusted even during a record performance.
The MM type cartridge PC 330 is used for the cartridge.
We have adopted a double-structured cabinet that combines hard plywood and metal base.
In addition, a horizontally adjustable insulator is used to suggest the effects of howling and external vibration.
The rotation speed can be changed only by changing the constant of the electronic circuit. In addition, while monitoring the strobe inscribed on the periphery of the turntable, fine adjustment of 33 1/3 or 45 rpm can be made within ± 2% independently.
Since the motor is directly driven by a constant voltage circuit, there is no need to replace the pulley depending on the local power frequency (50Hz/60Hz).
It uses an arm elevation mechanism that does not damage records or needle tips.
It adopts a layout in which operation functions are collected in one panel.
Equipped with a strobe light.
Uses a low-capacity (LSC) output code that can handle 4 ch playback.
Model Rating
Type | Record player |
Motor | Brushless DC servo motor |
Drive system | Direct drive |
Turntable | 31 cm diameter aluminum alloy die-cast |
Number of revolutions | 33 1/3, 45 rpm (fine adjustment possible) |
Speed change | Electronic |
Rotational speed fine adjustment range | Within ± 2% (Independent Adjustment for Each Rotation) |
Uneven rotation | 0.05% or Less (WRMS) |
S/N | 58 dB or more |
Tone arm | Static balance S-shaped pipe arm |
Attached cartridge | MM Type (PC-330) |
Attachment mechanism | Arm elevation mechanism Anti-skating mechanism Lateral balancer Plug-in type head shell Strobe light Horizontal adjustment type insulator |
Semiconductor used | Transistor : 12 Diode : 19 units |
Power supply voltage | 100 VAC, 50Hz/60Hz |
External dimensions | Width 480x Height 185x Depth 410 mm |
Weight | 10.5kg |