Stroboscope Disc for Record Players

General Characterization

If the rotational speed of a audio record player shell be controlled precisely, the Strobodisc is the right choice. HiFi turntable for vinylrecords are in again! It doesn’t matter whether with a low-price segment or with high-quality drives of the high-end class, the rotational speed must be able to be monitored. By using a light-source from a light bulb or an LED supplied by 50 Hz, therefore meets the present Strobodisc the conditions for a extremely precise speed monitoring at 33 1/3 and 45 RPM.
Compact Discs (CDs) have been more or less displaced by MP3 files which can be easily downloaded from the Internet. Wave or MP3 file formats are software, thus they can be played with a highly complex IT infrastructure – which must be maintained in shorter and shorter intervals. While no one can guarantee, that certain music archives on digital memory mediums can still be played safely in 20 or even 100 years from now. An analog vinyl LP (long-playing) is therefore very robust and is able to be played with simple constructed record players even in a century from now.
The present stroboscope disc was developed for turntable fitted with a belt-drive. But it also can be utilized for drives with incorporated controller (PLL with Quartz reference frequency), to ascertain large variances of the rotational speed or to inspect for wanders and phase jitters.

Characteristics of the Strobe Disc:
  • Outside diameter [mm]: 140
  • Diameter spindle hole [mm]: 7.0 0/-0.05
  • Disc thickness [mm]: 2.4
  • Special material with high torsional stiffness
  • Very precisely milled thus fewer phase jitters and greater ease in reading off
  • Swiss Made

Application field:
  • Usable for validating the actual rotational speed of record players for 33 1/3 and 45 RPM

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Document information:
Copyright © 2015 by René Merz, CH-3280 Murten, All Rights Reserved.
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Date last modified: 02.05.2016 17:32:40