[time-nuts] HP5065a cfield issue

[paul swed]

Yes absolutely it can go back and it is the same offset. I can get real
numbers from memory 3 seconds for 5ns drift and the units slow. Will
confirm and reshare.
Regards
Paul.


On Wed, Dec 2, 2020 at 2:52 PM Bob kb8tq <kb8tq at n1k.org> wrote:

> Hi
>
> Just double checking….. Are we still after a change went past 1/3 of the
> pot range?
>
> Can we get the pot back to the original location and measure the frequency
> offset
> (even if only in a crude fashion)?
>
> Best guess is still that this should be a ppb or more of shift. If it’s
> down in the
> 4x10^-11 range then indeed, there’s something off in the C Field setup.
>
> Bob
>
> > On Dec 2, 2020, at 2:03 PM, paul swed <paulswedb at gmail.com> wrote:
> >
> > Corby will check. Though in looking at the cfield circuits it does appear
> > all to be correct. Its some other odd offset that has crept in.
> > Thanks
> >
> > On Wed, Dec 2, 2020 at 1:56 PM <cdelect at juno.com> wrote:
> >
> >> Paul,
> >>
> >> One other thing to check.
> >>
> >> Put a DC coupled scope on the C-field pot wiper and rotate the pot back
> >> and forth.
> >>
> >> Make sure there are no jumps or noise.
> >>
> >> Sometimes the pot gets noisy in a section.
> >>
> >> Rotating it back and forth across the bad sections will usually clean it
> >> up.
> >>
> >> Cheers,
> >>
> >> Corby
> >>
> >>
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