[time-nuts] Re: HP 5065A, no 2nd harmonic.

Dana Whitlow k8yumdoober at gmail.com
Fri Nov 19 09:48:02 UTC 2021


TVB, I'm interested in the nitty-gritty of this problem and would appreciate
it if you OK this thread's being kept on the group.

Dana


On Thu, Nov 18, 2021 at 6:58 PM Jared Cabot via time-nuts <
time-nuts at lists.febo.com> wrote:

> Hi,
> Your help is appreciated. We can keep this on-list for now I guess, on the
> chance it helps someone in the future.
>
> Jared.
>
> ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
> On Friday, November 19th, 2021 at 08:25, paul swed <paulswedb at gmail.com>
> wrote:
>
> > Jared I would be happy to see if I can help remotely. We may want to
> take this offline or not. Others may find it interesting.
> > Regards
> > Paul
> > WB8TSL
> >
>
> > On Thu, Nov 18, 2021 at 12:56 PM Jared Cabot via time-nuts <
> time-nuts at lists.febo.com> wrote:
> >
>
> > > Hi all,
> > >
>
> > > I have a 5065A Rubidium Standard that was working ok, but has lost the
> 2nd harmonic.
> > > My voltages are all ok, the physics package hasn't overheated and I
> have replaced the usual resistors on the lamp assembly (and it was running
> fine afterward for a while), the lamp illuminates, and I've done the
> procedure to remove cell flooding.
> > > All readings on the 'circuit check' switch are nominal, apart from the
> 2nd harmonic position. No matter what I do, I can no longer get it to raise
> above 0.
> > > However, when I first turn the unit on, the needle drops to 0 and
> flicks a little before settling on 0 and staying there.
> > >
>
> > > Can someone help me get this unit up and running again?
> > >
>
> > > Thanks!
> > > Jared_______________________________________________
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