[time-nuts] Surplus Guidelines, was: Rubidium Standard
phk at phk.freebsd.dk
Sun Dec 10 14:42:59 EST 2006
In message <457C6134.4030606 at pacific.net>, Brooke Clarke writes:
>I think there are two things that go wrong with Rubidium standards.
>1. The Rubidium in either the lamp or the absorption cell (I forget
>which) gets used up [...]
That's not quite correct. The normal "old age" failure mode is
that the glass bulb absorbs rubidium and becomes so blackend that
the light doesn't shine through any more.
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
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