In message <[email protected]>, "J. Fors
ter" writes:

>As to making one, I'd use stainless Conflat parts from eBay, used
>commercial pumps, feedthroughs, fittings, etc.  You can spend a lot of
>time trying to leak check home brew stuff.

USNO gave up on stainless, too much magnetic field.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
[email protected]         | 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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