[time-nuts] So what’s inside that Cs Beam Tube anyway?

paul swed paulswedb at gmail.com
Thu Nov 3 10:27:38 EDT 2016


Tom
I may ask for the paper offline. Though kind of wonder how much sense I
will make of it.
What I am reading is that increasing the temp of the oven in an end of life
tube can indeed increase the signal. Maybe it doesn't shift the spectrum or
resonance. That would tend to suggest my funny offset is the DC oven
controller. Seems hard to believe because its only the oven thats under DC
heating.

Thanks for teaching.
Regards
Paul
WB8TSL

On Thu, Nov 3, 2016 at 5:36 AM, Tom Van Baak <tvb at leapsecond.com> wrote:

> > Never heard that story.  You gotta love it:  a hot rod atomic clock.
> >
> > Rick
>
> A well-written, very readable version of the story is in here:
> http://www.hp.com/hpinfo/abouthp/histnfacts/publications/measure/pdf/1977_
> 04.pdf
>
> and the technical paper with all the details of the experiment is here:
> https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19820012654.pdf
>
> Another story about the 5071 is "turbo" mode which hp/Agilent briefly
> touted at PTTI 10 or 15 years ago. Do you remember that? It was a firmware
> upgrade that would boost stability even above the high-performance level.
> Of course it would burn Cs like there was no tomorrow, but for a brief time
> you'd get another couple of dB. Hard to say if that was a Jack idea or a
> Len idea. But it reminded me of "Spinal Tap". I wish I had kept a copy of
> the flyer or the ADEV plots. Maybe you know?
>
> See, these are all the kinds of things Attila could play with and tell us
> about if he decided to build his own cesium clock ;-)
>
> /tvb
>
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