[time-nuts] Regulating a pendulum clock

jimlux jimlux at earthlink.net
Tue Aug 10 01:32:21 UTC 2010


Bob Camp wrote:
> Hi
> 
> For that matter, how hard is it to put it in a vacuum with temperature
> control? Gets two big issues out of the way pretty fast. We certainly buy
> crystal oscillators that are heated and enclosed in pressure tight
> containers (not quite the same as vacuum, but close). 
> 
> Bob
> 

temperature compensation to ppm accuracy is pretty easy, and has been 
done for 100 years or more.

Compensating for air drag changes with temperature might be trickier. 
however, the period doesn't change very much with drag.



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