[volt-nuts] Resistance standard
jfor at quik.com
Wed Dec 16 16:36:36 UTC 2009
I think it could be hard to get a strain free mount arrangement that way.
If you don't like oil (a reasonable dislike) there are some high MW
Freons. However they are very expensive and maybe (wrongly, IMO) highly
regulated because of the Global Warming alarmists.
> In message <1188.8.131.52.35.1260974407.squirrel at popaccts.quik.com>, "J.
> 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
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