[time-nuts] Thunderbolt stability and ambient temperature

Poul-Henning Kamp phk at phk.freebsd.dk
Thu Jun 11 17:59:37 EDT 2009


In message <AC8514A8EEB148259E3CD49B8E468564 at athlon>, "Ulrich Bangert" writes:
>> I'm not talking about crystal ovens, I'm talking about 
>> timekeeping kit in general: how to filter high frequency 
>> temperature fluctuations out, so the PLL does not have to 
>> deal with them.
>

>If you apply an overall change in temperature insulation to the ambient [...]

Which is why I suggested using an old, unplugged fridge.

Your typical time-nuts kit will not have a heatflow that can warm the
interior of a fridge signifiantly, but the thermal inertia of the fridge
is perfect for reducing temperature fluctuations.

-- 
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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