@jkj1962 wrote:
@donp wrote:
[snipped for space]
…if the strobe is based on the frequency of the 60 Hz AC line, which is probably is a little orange neon, you’re off as well. It has variance, too. If it varies, so does your speed.
JFYI power companies are VERY careful with the frequency of the power they produce… to the point that at the end of the day if they are even one cycle off they will make a little adjustment to put it back in… otherwise all those obsolete clocks with sychronous motors would not keep the right time.
