[ntp:questions] Keeping NTP Honest

Richard B. Gilbert rgilbert88 at comcast.net
Fri Jul 17 00:06:08 UTC 2009

Hal Murray wrote:
>> One thing you could try would be to put your clock in a thermostatically 
>> controlled oven.  I'm not talking about something you could bake a pizza 
>> in, but rather something that will keep 140 degrees F +/- half a degree. 
> 140 is pretty warm.  That will reduce the lifetime of most
> electronics quite a bit.

If possible, you maintain just the crystal at 140 degrees.  And the 140 
degrees is arbitrary.  You just want a value that will not be exceeded 
by the weather or heat generating components!  It's called an "Oven 
Controlled crystal oscillator or "OCXO".

More information about the questions mailing list