[volt-nuts] JJA progress report

[Joe Hobart]

If Earth is subjected to a GRB strong enough to damage ground based electronics,
we are all going to have much more urgent problems than wondering if a JVS is
operating properly.  Same for an EMP.  Lightning, however, might pose a more
localized and serious threat.

Part of your training as an expert operator will include techniques to dissuade
various critters from considering the JVS for their burial ceremonies.

Carrying your best zener reference to the nearest facility with another JVS
would be less expensive than buying and operating a second or third system.

Joe


On 2/16/2014 12:58 AM, cheater00 . wrote:
> How do you know the primary standard is not off? That is, how do you
> know it's still "primary"? Maybe a gamma ray burst from a supernova
> damaged some of the machinery inside, or a colony of crazy ants
> crawled in and died inside.
> 
> D.
> 
> On Sat, Feb 15, 2014 at 10:10 PM, Joe Hobart <nova at npgcable.com> wrote:
>>
>> These devices are primary standards; you don't need three; you probably don't
>> even need two.  If certain conditions are met, conditions you can check/verify,
>> they will accurately generate the desired voltages.
>>
>> What you will probably want are at least three good zener type voltage standards
>> and a constant temperature environment.  The three will serve as a day to day
>> standard and reality check on the JJA.  And you need to really learn how to
>> operate the JJA standard, so you can detect and correct any problems.
>>
>> Joe Hobart
>> Flagstaff, Arizona
>>
>>
>> On 2/15/2014 1:17 PM, Gordon DeWitte wrote:
>>> Clearly need three (or some higher odd number) so they can vote...
>>>
>>> Gordon
>>>
>>>
>>> On Sat, Feb 15, 2014 at 2:51 AM, Poul-Henning Kamp <phk at phk.freebsd.dk>wrote:
>>>
>>>> In message <1392413149.25851.YahooMailNeo at web142405.mail.bf1.yahoo.com>,
>>>> Randy
>>>> Evans writes:
>>>>
>>>>> We'll all probably want a spare unit also.
>>>>
>>>> Two, how can you know which one fails, if you only have two ?
>>>>
>>>> --
>>>> 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.
>>>> _______________________________________________
>>>