[time-nuts] Used Hydrogen Maser

[Bob kb8tq]

Cool !!!

> On Feb 6, 2021, at 1:05 PM, Attila Kinali <attila at kinali.ch> wrote:
> 
> Moin,
> 
> On Wed, 10 Jul 2019 10:55:07 -0700
> "Richard (Rick) Karlquist" <richard at karlquist.com> wrote:
> 
>> FWIW, about 20 years ago, Len Cutler and Robin Giffard of 5071A fame
>> built several Hg ion clocks to be shipped to some govt customer I
>> don't remember.  One of the clocks was dropped by the shipping company
>> UPS or FedEX) and destroyed.  Only then did Len learn that HP was
>> self insured, probably as part of a package deal to get a low
>> corporate shipping rate.  HP products were packed extremely well, so
>> the only real risk was the unit getting stolen.  I vaguely remember
>> Len saying they were out $10K, which was probably just the cost of
>> parts.  Nevertheless, it didn't seem like building an Hg clock was
>> all that big of a project.  Way simpler than the 5071A.
>> Now a days, the electronics would be considerably easier and cheaper. 
>> The mechanical parts would all be CNC'ed by an online machine shop.
> 
> Magnus just send me out to chase an (unrelated) paper and I stumbled
> over [1] which describes the Hg standard that Cutler & Co built.
> Remembering this discussion I thought it might be interesting to
> some.
> 
> 
> 			Attila Kinali
> "Trapped Mercury 199 Ion Frequency Standard", Cutler,
> Giffard,  McGuire, PTTI, 1981
> http://time.kinali.ch/ptti/1981papers/Vol%2013_30.pdf
> 
> -- 
> The driving force behind research is the question: "Why?"
> There are things we don't understand and things we always 
> wonder about. And that's why we do research.
> 		-- Kobayashi Makoto
> 
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