[time-nuts] Rubidium Cells for Sale ?!

[jimlux]

On 5/7/19 2:16 PM, Bob kb8tq wrote:
> Hi
> 
> Well, given the price, running it in a thermal-vac chamber would not significantly increase
> the charges to your credit card :)

But perhaps Poul-Henning was thinking about the gravitational force.
So you could buy two, and drop them alternately down a pair of evacuated 
drop towers.


I did notice that the temperature range is quite small for flight 
hardware (typical design range might be -10 to +55) - but then, they're 
mounted in a fairly large satellite and that's basically putting the 
thermal engineering responsibility on the satellite bus engineers. 
Holding within 5 degrees nominal is fairly straightforward

it's people wanting to hold milliKelvins that are the ones making trouble.


> 
> Bob
> 
>> On May 7, 2019, at 3:23 PM, Poul-Henning Kamp <phk at phk.freebsd.dk> wrote:
>>
>> --------
>> In message <BFAC22A1-27AE-4B1F-8FDF-EEC87133BB41 at n1k.org>, Bob kb8tq writes:
>>
>>> In terms of “I don’t want one” …. well, they are pretty much the best Rb ever
>>> made anywhere / ever. They are as close as you will get to a maser and
>>> not *be* a maser.
>>
>> Rumours has it that the design is optimized for space use and therefore
>> not quite as fantastic at sea-level.
>>
>> -- 
>> 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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