[time-nuts] any way to bootstrap a frequency standard into a, voltage or resistance standard?

[Bruce Griffiths]

WB6BNQ wrote:
> Ed,
>
> No way in hell does that thing qualify as a voltage standard.  It barely qualifies as a VERY short term transfer device assuming the temperature does not change.
>
> If you want a real voltage reference then buy, from eBay, a Fluke 731B voltage standard.  You will still need to get it calibrated, but then it will hold under 10ppm for well over a year or
> more.  Actually, if they are adjusted correctly, you can get less than 5ppm and it will hold it at a given temperature.  These items are serious devices and their latest versions (very expensive)
> are better than a properly maintained and operated group of standard cells.
>
>   
The latest Fluke voltage standards use a selected LTZ1000 plus a
precision resistor array.
The earlier versions used selected Motorola zener diode references.
The latest versions allow the LTZ1000 chip temperature to be cycled to
largely eliminate hysteresis which may occur when they lose power during
shipment.
> Bill....WB6BNQ
>
>
>   

Bruce