-------- 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@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. -- Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG         | TCP/IP since RFC 956 FreeBSD committer       | BSD since 4.3-tahoe    Never attribute to malice what can adequately be explained by incompetence. _______________________________________________ volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.