[volt-nuts] Making a Reference IC

[John Phillips]

We upgraded about 20 3458As  to the 4 ppm reference for a local equipment
rental co.
Others may have done the same to and are selling the old boards that may be
even more stable than 4 ppm because they have aged for years.

The difference between references is aging and screening.


On Mon, Sep 14, 2015 at 4:37 AM, Poul-Henning Kamp <phk at phk.freebsd.dk>
wrote:

> --------
> In message <CANX10hC6YXVNqMa+mo2K1TmdCDA0XBQa6G0O=
> ndcYiggBW_QOw at mail.gmail.com>, "Dr. David Kirkby (Kirkby Microwave Ltd)"
> writes:
>
> >A used 3458A fetches several thousand USD,
>
> There's actually one in france for EUR1500 right now...
>
>
> --
> Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
> phk at 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.
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-- 

*John Phillips*