[time-nuts] Rb cooling

Charles P. Steinmetz charles_steinmetz at lavabit.com
Mon Jul 18 04:57:05 UTC 2011


Chuck wrote:

>Cooling down an oven is not a good thing, as it simply ups the
>power the oven control circuitry dumps into the oven to keep it
>hot.

The temperature, thermal mass, and conductivity of the surroundings 
determine how quickly an oven cools down when the heater is off.  Too 
little cooling, and the oven control loop cannot do its job 
properly.  As others have said, rubidium oscillator manufacturers 
specify them for operation within a certain range of baseplate 
temperatures.  Best performance is often obtained near the middle of 
the specified window.

Best regards,

Charles







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