[78-L] Lacquer discs recorded at 80 rpm

Jeff Lichtman jeff at swazoo.com
Tue Jan 4 19:57:21 PST 2011


>I believe 80 was used for film playbacks because (a) 80 was easy to check for
>speed (20 revs in 15 seconds) . . .
>
>dl

Also, it is possible to use a strobe disk to calibrate to 80 RPM with 
either 60 CPS or 50 CPS, so the speed can be set exactly with either 
60-cycle or 50-cycle current.


                        -        Jeff Lichtman
                                 jeff at swazoo.com
                                 Check out Swazoo Koolak's Web Jukebox at
                                 http://swazoo.com/ 



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