[volt-nuts] Is there a "standard" much better than a LTZ1000, but much cheaper than a Josephson Junction Array?

[Dr. David Kirkby]

-------- Original message --------
From: Poul-Henning Kamp 
Date:20/10/2016 00:08 (GMT+00:00) 
To: Discussion of precise voltage measurement ,"Dr. David Kirkby (Kirkby Microwave Ltd)" 
Subject: Re: [volt-nuts] Is there a "standard" much better than a LTZ1000, but much cheaper than a Josephson Junction Array? 

--------
In message <CANX10hCbbrWvtQhybFf-Pm1uaSyZ3agHLEo8p_5iyoyYR-gP8Q at mail.gmail.com>
, "Dr. David Kirkby (Kirkby Microwave Ltd)" writes:

>The question about the Josephson Junction Array got me thinking. I wonder
>if there are any sort of technologies that can produce a voltage with much
>better stability than the LTZ1000, but without the cost of a Josephson
>Junction Array. A sort of half-way house.

As far as I know there are only two steps between the LTZ1000 and JJAs:

1. Specially cared for LTZ1000's (See: Fluke)

2. Lots of LTZ1000's to get sqrt(N) reductions.


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