Thursday, 10 February 2011

A Stroboscopic Gramaphone Speed Tester for 78rpm Records.

A Stroboscopic Gramaphone Speed Tester for 78rpm Records

To be viewed by Electric Light (A.C. 50 Cycles)

How to calibrate your record player.

Place the speed tester on turntable. Adjust speed until black lines appear to remain stationary, which will denote the correct speed (i.e. 78 rpm). If the lines appear to move forward, the turntable is revolving too quickly - if they appear to move backwards, it is turning too slowly.

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