Audio Database

Image of the PL-61
Commentary

A belt drive player that achieves more precise rotation with a brushless DC servo hole motor equipped with a rotational speed control device.

The motor is a brushless motor using a Hall element developed by Pioneer.
The driving magnetic field of this motor is generated by the current from the transistor circuit that works by switching the Hall element. The magnetic force change to the Hall element is sequentially and regularly performed by a pre-magnetized magnet rotor, and accurate rotation is obtained.
The low-speed motor, which rotates at 10 times the speed of the turntable, reduces vibration and improves S/N and durability. In addition, since the power supply system uses a constant voltage circuit, it is not affected by fluctuations in power supply voltage.

The DC servo mechanism of the motor consists of a revolution detector and a control circuit.
Since a capacitor-type detector generates an AC signal by rotation, a change in the number of revolutions changes directly into a change in the oscillation signal. Since this detector is composed of a substrate attached to the rotor and stator of the motor, even a small rotational deviation changes to the oscillation frequency and controls the drive current to keep the motor rotation constant.

33 1/3, 45 rpm speed switching is electronic by switching circuit constant. Therefore, there is no need to replace the conventional belt, so there is no trouble caused by the belt or its switching mechanism.
In addition, it has a fine adjustment knob independent of 33 1/3 ・ 45 rpm, and the rotation speed can be adjusted within ± 2%.

Uses a polyurethane belt.

The tone arm is S-shaped, and sensitivity is improved by using a new support mechanism for the bearing. In addition, the head shell is a lightweight type with hole opening, and in addition to the tracing capability of the tone arm, the tracking capability is greatly improved.
The needle pressure can be adjusted easily by simply adjusting the weight with a direct-reading scale after balancing the front and back around the fulcrum.

Pioneer's original anti-skating mechanism that applies magnetic repulsion is used to cancel the inside force. The needle pressure scale value shows the anti-skating bias value as it is. Since it is a built-in type built into the body, it does not interfere with operation and has excellent durability.

A low-capacity code is used for the output code to reduce attenuation in the ultra-high band.

The tone arm is raised and lowered using a hydraulic arm elevation mechanism with smooth operation by button operation.

The cartridge is equipped with PC-20, a MM type cartridge.

It uses a large insulator and the level can be adjusted.

Model Rating
Type Record player
Motor Brushless DC servo hole motor
Drive system Belt drive
Turntable 31 cm Diameter Aluminum Alloy Die Cast (1.4 kg)
Number of revolutions 33 1/3, 45 rpm (fine adjustment possible)
Rotational speed adjustment range ± 2% or less, independent adjustment of each speed
Speed change Electronic
Uneven rotation 0.05% or Less (WRMS)
S/N 55 dB or more
Tone arm Static balance type S-shaped pipe arm
Cartridge MM Type (PC-20)
Attachment mechanism Arm elevation mechanism
Magnetic repulsion type anti-skating mechanism
Lateral balancer
Arm height adjustment mechanism
Plug-in type head shell
Large insulator
Strobe
Level
Semiconductor used Transistor : 22
Diode : 15 pcs
IC : 1
Hall element : 2 pieces
External dimensions Width 498x Height 201x Depth 429 mm
Weight 11kg