Assertion: turntable's speed | /r/HasProperty | monitored via strobe
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Source sentences:
text: I did make an acrylic platter years ago (read in the Absolute Sound about that idea) on a custom made Oracle I put together with an SME V. That table used the original AC oracle cogging motor and the speed had always to be monitored via a strobe I glued to the bottom of the table and verified with a flat mirror.