On 11/30/08 5:29 PM, "Brian Kirby" <[EMAIL PROTECTED]> wrote: > A cryo may be hard to put togather (and maintain - from experience) > but there are plenty of peltier junctions/devices out there... > > Brian KD4FM > > Lux, James P wrote: >> Cost wise, I like the snippet I read in Scientific American a decade or so >> ago.. LN2 is the cost of milk, LHe is the cost of fine scotch whisky >> Is a obsessive precision worth a bottle of scotch? >> >> Jim Can't get that cold with Peltiers.. Even 77K is a stretch. You run into a problem with the maximum delta T from one device, and then having to suck up the heat from that one. You wind up with a pyramid shaped stack with terrible efficiency. The Melcor website has details. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
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