On 6/3/19 8:52 AM, Richard (Rick) Karlquist wrote:
FWIW, there is a nice article in IEEE Spectrum, Oct. 2014, page 42 on OLC's that starts out by showing the 1956 (non-commerical) clock by Parry and Essen. It has a tutorial on OLC's and a history of the second. The author is Prof. Lodewyck from France who actually builds these things. Highty recommended, even though now 5 years out of date.
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