[time-nuts] Some pics of the Datron 491x DC reference cell

Bruce Griffiths bruce.griffiths at xtra.co.nz
Sun Feb 1 22:20:11 UTC 2009

Dr. Frank Stellmach wrote:
> Bill,
> thank you very much for the schematics and the photographs!
> Using XP / firefox, I was able to retrieve the files with the given 
> special link, and also very easily with the FileZilla Client.
> The most interesting part, i.e. the precision resistor circuitry, 
> obviously resides on the bottom side of the ref board.
> Would be great to get a photo also from that side, as Datron made some 
> efforts to get rid of strain and heat conduction effects.
> Best regards - Frank Stellmach

The precision resistors are more likely to be inside the metal can
labeled vishay.


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