[time-nuts] VRefs - I'm a bigger Voltnut than a timenut..

[wje]

Yes, I do have full schematics for the Datron refs, including the 
LTZ1000 circuitry. It isn't the same as that in the LTZ1000 data sheet. 
I'll dig out my manuals. If you'd like a copy, email your postal address 
and I'll copy the page and send it to you:

wje at quackers.net

I've built a few standards myself. My latest was one using 16 399's. I 
shamelessly stole some circuit designs from a Fluke reference to provide 
sense-current compensation, etc. It was a lot of fun.

Bill Ezell
----------
They said 'Windows or better'
so I used Linux.



Dr. Frank Stellmach wrote:
> @Bill Ezell:
>
> Well, I have the same motivation to invest time and money into "precision".
>
> I started with metrology working in a German Airforce cal lab  in 1980.
> We had all that goddie equipment, ie. a bank of Weston standard cells, 
> the Fluke cal system, DCF receiver, a HP caesium standard, and so on. 
> This cal lab was tightly associated with our PTB.
> In a "secret" lab they obviously made some tests on the new Josephson 
> junction standard, as they transferred the Volt from this lab to our 
> facility with a Fluke 731A, and they were very proud of that.
>
>  From then on, the ppm quest never let me go.
> It's biggest fun for me to design standards on my own, not only to 
> collect and repair old ones.
>
> I've already read about the Datron standards, but didn't know details, 
> and that it's so sophisticated. It's inner principle of dividing the 
> reference is identical to the Fluke 5720A, I think.
>
> Do you have a detailed schematic of the LTZ reference circuitry in the 
> Datron?
> This cannot be found in the manuals of HP3458 or Fluke 7000.
>
> In Germany there is no big chance for getting surplus standards for a 
> reasonable price.
> It's a pity..
>
> Frank
>
>
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