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

[Tom Van Baak]

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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