[time-nuts] Large Qty HP C-Beam Tubes available
jfor at quik.com
Sat Jan 15 18:50:23 UTC 2011
Cs tubes are hermetically sealed to hold high vacuum for decades. Tubes
from WW II still work perfectly, unless they were flawed at the outset.
Reduced air pressure is extremely unlikely to damsage a Cs tube.
> I've heard of coin cells failing due to air freight. The pressure changes
> are always something to consider.
> I put a lot of camping gear in ammo cases. You can always tell which cases
> seal because they are a bugger to open after a trip from the mountains.
> ------Original Message------
> From: J. Forster
> To: lists at lazygranch.com
> Cc: Discussion of precise time and frequency measurement
> ReplyTo: jfor at quik.com
> Subject: Re: [time-nuts] Large Qty HP C-Beam Tubes available
> Sent: Jan 15, 2011 10:05 AM
> Yes. If they are on a plane too long, the time will be off a bit. Einstein
> predicted that and Bob Pound measured it. :)
> Look, I suggested ground because virtually anything can be shipped that
> way, up to and including BW and CW agents and nukes. A spec of Cs is not
> an issue.
>> Is there an issue with altitude change (air freight) for the tubes.
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