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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