[time-nuts] HP5065a cfield issue

[Bob kb8tq]

Hi

Try rotating the 5065 180 degrees and see if the frequency shifts. If it shifts
more than a little, you have something local that is magnetized. 

Bob

> On Dec 3, 2020, at 1:23 PM, paul swed <paulswedb at gmail.com> wrote:
> 
> Well Bob what an unusual comment about large magnetic fields. It just so
> happens that maybe I actually had one about 8 weeks ago. Its called a
> lightning strike about 60' away. Just found the actual 100' pine tree 2
> days ago. I had been looking but it sounded like it hit in the opposite
> direction.
> The strike did wipe out a nvr and copper networking. But it did not seem to
> impact the the cesiums or many many other pieces of equipment.
> The 5065 is still super stable.
> Regards
> Paul
> 
> 
> 
> On Thu, Dec 3, 2020 at 11:57 AM Bob kb8tq <kb8tq at n1k.org> wrote:
> 
>> Hi
>> 
>> I don’t believe that the quantum transitions are sensitive enough to minor
>> temperature
>> shifts to account for a 1 or 2 ppb sort of shift…..  Magnetic field, (
>> giant magnetic play toy
>> moved next to Rb … )  yes that will do the trick, but temperature … tough
>> to do …
>> 
>> Everything I can find that documents what’s what is behind this or that
>> pay wall. I’m
>> not $80 interested enough in the answer :)
>> 
>> Bob
>> 
>>> On Dec 3, 2020, at 10:51 AM, Poul-Henning Kamp <phk at phk.freebsd.dk>
>> wrote:
>>> 
>>> --------
>>> 
>>> Could it be the thermostat circuits have shifted so you run at a
>>> different temperature now ?
>>> 
>>> --
>>> 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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