Quartz-Locked Fully-Automatic Turntable (1980)
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.
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
Tonearm: Dynamic balance electronic servo controlled
Effective length: 245mm
Weight range: 14.5 to 24g (inc headshell)
Headshell weight: 11g
Height range: 42 to 48mm
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
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JVC QL-Y5F / QLY5F owners manual, service manuals and schematics are for reference only and the Vinyl Engine bears no responsibility for errors or other inaccuracies. The PDF files are provided under strict licence. Reproduction without prior permission or for financial gain is strictly prohibited. This website is not affiliated with or sponsored by JVC.