Path: utzoo!utgpu!news-server.csri.toronto.edu!mailrus!umich!yale!cs.yale.edu!yarvin-norman From: yarvin-norman@cs.yale.edu (Norman Yarvin) Newsgroups: sci.electronics Subject: Re: sources for IR scope tubes Message-ID: <25775@cs.yale.edu> Date: 8 Aug 90 21:21:28 GMT References: <26851@nigel.ee.udel.edu> <10846@crdgw1.crd.ge.com> <2903@isc-br.ISC-BR.COM> Sender: news@cs.yale.edu Distribution: na Lines: 10 Nntp-Posting-Host: salmon.zoo2.cs.yale.edu Originator: yarvin@salmon.CS.Yale.Edu In article <2903@isc-br.ISC-BR.COM> jimc@isc-br.ISC-BR.COM (Jim Cathey) writes: >The last (and only) heat-seeking doodad I saw required a liquid >nitrogen (or something like that) supply to cool the sensor assembly >down to the point where it would work. The early Sidewinders weren't liquid-nitrogen-cooled; that was introduced in later versions, to make the seeker more sensitive. -- Norman Yarvin yarvin-norman@cs.yale.edu