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JVC QL-Y5F

Quartz-Locked Fully-Automatic Turntable (1980)

Description

A top model from the JVC range, the QLY5F incorporates this company's version of the electronic tonearm using linear force motors.

Any vibrating system utilizing mass and compliance has a resonance point. Therefore, the same applies to the tonearm used in a turntable.

Tonearms now sold on the market possess a resonance frequency at around 5-10Hz. This resonance frequency has a great effect on the reproduction of middle and low frequency ranges.

In addition, warped and/or off-center records, and/or the external vibrations of it make the tonearm vibrate, thus resulting in a modulation of the sound groove signals when the sound groove is being reproduced.

The electro-dynamic servo tonearm employed on the JVC QL-Y5F has been developed to solve these problems.

The vibration speed of the tonearm is electrically detected and damped by the operation of the servo loop.

Specifications

Motor: coreless, DC type, FG servomotor

Drive system: direct drive

Speeds: 33 and 45rpm

Wow and flutter: 0.025% WRMS

Signal to noise ratio: more than 78dB

Platter: 310mm

Tonearm: Dynamic balance electronic servo controlled

Effective length: 245mm

Overhang: 15mm

Weight range: 14.5 to 24g (inc headshell)

Headshell weight: 11g

Height range: 42 to 48mm

Review

The QL-Y5F motor gave a fine set of results - state of the art in fact - and the high torque provided a rapid start up. The arm was geometrically well aligned, and unusually for an automatic it offered variable height and headshell tilt as well - £220 HiFi Choice 1984