[time-nuts] Manual: VARIAN R-20 Rubidium frequency standard.

[Bill Notfaded]

The scans look good on the website.  Thanks for the lead Tom.  I still like
collecting the original manuals for devices I have.  You're right sometimes
harder to find than the gear is!

Bill

On Sun, Dec 6, 2020, 6:10 AM Tom Van Baak <tvb at leapsecond.com> wrote:

> Nice find. Original manuals are sometimes harder to find than original
> equipment. In the case of the Varian R20 there is a clean copy on fellow
> time-nut Didier's website:
>
> http://www.ko4bb.com/manuals
>
> Search for Varian or R20. The 128 page file is:
>
> Varian_R20_Rubidium_Frequency_Standard_Service_Manual_1966.pdf
>
> See how your hardcopy compares with that PDF. FYI, there is a nice
> history of Rb standards here:
>
> "A History of the Rubidium Frequency Standard"
>
> http://www.wriley.com/A%20History%20of%20the%20Rubidium%20Frequency%20Standard.pdf
>
> /tvb
>
>
> On 12/6/2020 3:24 AM, Ulf Kylenfall via time-nuts wrote:
> > Gentlemen.
> > I have salvaged a manual for a Varian R-20 Rubidium Frequency Standard.
> >
> > It was left when my employer borrowed such a unit when
> > performing the first cross-atlantic VLBI Experiments
> > some time in the late 70's. The unit must have been returned to its
> > owner but they forgot to include the manual...
> >
> > It is in excellent shape.
> >
> > Are there any such units still in operation?
> > Is there a need for it? The thickness of the papers
> > is about 1 inch. Most pages are easy enough to scan but the
> > last 1/3rd is fold-out schematics for which I have no
> > appropriate way to scan.
> >
> > Best Regards
> >
> > Ulf Kylenfall
> > SM6GXV
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