[time-nuts] Making a HP 10811 and similar types better in the real world Part I

Rick Karlquist richard at karlquist.com
Wed Sep 21 20:35:32 UTC 2011

Perry Sandeen wrote:
> GM List,
> Basic commandments of precision grade Crystal Oscillators. (1) It is both
> an art and a science. (2)  The devil is in many details. Unbelievers
> suffer.
> Here is the framework of methods that really work.  (Assuming a used unit)

Doing what you describe will result in a very sensitive
humidity sensor, having eliminated the thermometer effect.
In any event, none of this affects crystal aging or
frequency jumps.  This is what limits the E1938A which
is hermetic and has a thermal gain 1000 times better than
the 10811.

Rick Karlquist N6RK

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