Serge Auckland wrote:
Have you put a strobe disc on it, and measured just how fast it is
going? You can download a strobe disc from
http://www.extremephono.com/ftp/50Hz.PDF



Under ac lighting the lines advance slowly in the direction of travel
meaning it's too fast I think... I may try it later with a flourescent tube.
It may give a little more definition than an incandescent bulb. the effect
could still be discerned though..

Les

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Les Hemmings a.a #2251 SA