[volt-nuts] Resistance standard

Poul-Henning Kamp phk at phk.freebsd.dk
Wed Dec 16 15:18:47 UTC 2009

In message <1180. at popaccts.quik.com>, "J. Forste
r" writes:

>On the oil question, you really do need a sealed system, with provisions
>for expansion, or the oil will "breathe" with temperature and atmospheric
>pressure fluctuations and absorb water.

I would go for the copperblock and use thermal paste to improve the
resistors thermal contact with the block, rather than start
experimenting with oils.

The only reason oils got used in the first place, was lack of anything
better under the constraints back then.  Today most cal-labs try to
avoid it if at all possible.

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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