Sony PS-333 turntable

Sony Direct-Drive Turntable

Full automatic direct-drive turntable with a BSL motor

Magnedisc servo system for accurate speed sensing

Controls can be operated with the dust cover closed

Universal static balance type tonearm with bias adjustment

Illuminated stroboscope to check turntable speed.

Cartridge supplied

 

Specifications

Turntable Section

Type:  Fully automatic

Speeds:  33-⅓ and 45 rpm

Motor:  Linear BSL motor

Speed Control Range:  ±6%

Wow and Flutter:  0,03% WRMS, ±0,045 DIN

Signal-to-Noise Ratio:  70 dB DIN

Tonearm Section

Type:  Static balance

Overall Arm Length:  216,5 mm

Stylus Force adj. Range:  0 - 3 g

Shell Weight:  7,5 g

Cartridge Weight Range:  4,5 - 11 g

Cartridge Section

Type:  VL 37G

Channel Separation:  better than 23 dB at 1 kHz

 output Voltage:  3,5 mV at 1 kHz

Tracking Weight:  2 - 3 g

Stylus:  ND 137G

General

Power Requirements:  AC 240 V, 50 Hz

Power Consumption:  6 watts

Dimension (W x H x D):  430 x 125 x 365 mm

Weight:  5,3 kg

 

Philips AF-877 turntable

This hi-fi record player is equipped with "Direct Control", a completely new type of drive system combininig the advantages of both belt and direct drive systems and ensuring an absolutely constant turntable speed with negligible wow and flutter.

The prime mover is a d.c. motor which drives the turntable/tachometer assembly via a precision ground belt. The tachometer continuously monitors the turntable speed, which it feeds to an electronic circuit. This compares the signal from the tachometer to an extremely stable reference signal. Should any difference be found, a control signal is immediately triggered, the action of which is to adjust the power supply to the motor so that the correct turntable speed is instantly obtained. Mains voltage or temperature fluctuations and varying frictional forces arising from, say, the use of a cleaning arm thus have minimal effect on the turntable speed.

Other features of this record player in addition to its unique drive system are:

Extremely low rumble, thanks to the independent suspension of the turntable and pick-up arm.

Electronic touch controls for starting and stoping. These are a great convenience and are silent and vibration free in operation.

Function indication by LED's

Precise adjustment of turntable speed is made possible with the aid of fine-adjustment controls and an electronic speed indicator.

Adjustable stylus force and side-thrust compensation

Viscosity damped pick-up arm lift

Specifications:

Turntable Speeds:  33-1/3 and 45 rpm

Turntable Speed Adjustment Range:  ±3% (equal to one semitone)

Wow and Flutter

DIN :  les than 0,05%

WRMS :  less than 0,03%

Rumble

DIN A :  lower than -50 dB

DIN B :  lower than -70 dB

Tracking Error:  smaller than 0°9'/cm

Stylus Force:  adjustable from 0,75 to 3 gf

Arm Friction

Horizontal :  less than 15 mgf

Vertical :  less than 10 mgf

Mains Voltage and Frequency:  110 -120 V, 220 - 240 V 50/60 Hz

Power Consumption:  max 10 W

Dimensions (W x H x D):  420 x 144 x 348 mm (420 x 405 x 420 mm cover fully opened)

Weight:  approx 5,8 kg