[time-nuts] Caveats on Allan Deviation with ultra stable oscillators
hmurray at megapathdsl.net
Sat May 31 02:43:31 EDT 2014
> Always locate your DUTs physically orthogonal to each other.
Unless you have 3 clocks. (and everybody knows what happens if you only have
>From an old time-nuts message (Mar, 2009)
> Allied to this discussion is the Loomis effect, discovered by the
> American millionaire who had three Shortt clocks running in his
> basement. They synchronised unless aligned at 120 degrees to each
> other. I wonder weather they were shaking the bedrock, or maybe the
> gravitational attraction between the 10 kg pendulums may have
> synchronised them. (See "Tuxedo Park" by Jennet Conant) He qualified
> as the first time nut.
It's on page 67-68.
Google for >Tuxedo-Park Shortt< gets a hit in books.google.com at page 65
which is the start of the coverage of Shortt clocks. That was long before
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