Sony PS-FL77
2-Speed Fully Auto Front Loading Turntable (1982-1985)
Description
The PS-FL77 is a 2-speed, fully automatic, front loading turntable featuring a biotracer/linear tracking tonearm system.
The linear tracking tonearm is designed to duplicate the movement of the head which cuts the record master.
Compared with a pivoted arm, a linear tracking arm has a very small tracking error (which means greatly reduced harmonic distortion) and almost no pressure on the inside wall of the groove (which means improved tracking ability and channel separation).
The horizontal and vertical movement of the tonearm on the PS-FL77 is monitored by the Biotracer's own sensors, and this information is transmitted to the tonearm by the tonearm's own linear motors to suppress resonance at low frequencies and to obtain the maximum signal to noise ratio.
Specifications
Platter: 290mm aluminium alloy diecast
Motor: linear torque brushless and slotless motor
Drive system: direct drive
Control system: FG servo control
Speeds: 33 and 45rpm
Wow and flutter: 0.035% WRMS
Signal to noise ratio: 75dB
Automatic system: lead in, return, reject, repeat, record size selection
Tonearm: electronic linear tracking
Pivot to stylus length: 100mm
Overall arm length: 170mm
Tracking force adjustment: 1.25g (+-0.25g)
Cartridge: XL-250G plug-in type 6g
Replacement stylus: Sony ND-250G
