[time-nuts] cesium tube pumping

Rick Karlquist richard at karlquist.com
Wed May 11 18:08:51 EDT 2005

Ideally, all tubes should be pumped at all times.
I have heard that you should never go more than
18 months without pumping.

The pumping issue is the same with new or old designs.

Rick Karlquist

george said:
> How often does Cesium frequency standards require cesium tube pumping.
> Is it more frequent with age, less frequent with newer designs (5071's)?
> More frequent with older designs (hp5061's) ?
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