[time-nuts] CS reservoir depletion

Richard (Rick) Karlquist richard at karlquist.com
Thu Jan 13 05:09:01 UTC 2011

This is a popular FAQ that Cs engineers hear.

The correct answer (at least for HP/Agilent CBTs)
is that there is plenty of Cs in the tube, and
they don't fail because they ran out of Cs.  Something
else will always wear out first.

Regarding the general idea of rebuilding CBT's:

a used CBT is so "cesiated" that it is not practical
to rebuild it even on the regular CBT line.  Even
if it were, it is unlikely a time nut would have
the necessary high vacuum equipment.  It is pretty
serious stuff.  You also need to be able to laser
weld the case together when you are finished.  Sure
seems like a "don't try this at home thing".

We're still waiting to see if they can figure out
how make 5071 CBT's on the east coast, let alone
someone's garage.

Rick Karlquist N6RK

On 1/11/2011 4:06 PM, scmcgrath at gmail.com wrote:
> Now that we are discussing how to restore Rb lamps.
>   Has anyone given any thought to refilling or refluxing the Cs in depleted Cs tubes?
> Obviously opening would require high vaccum equipment - which is a totally separate category of nut (Or is it?)
> Scott
> Scott
> Sent from my Verizon Wireless BlackBerry
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