We used helium to cool IR detectors on the RF-4C. It is also fun later. The last IR system used nitrogen to cool the detectors. Not as much fun.
On Sat, Jul 25, 2020 at 11:35 RICHARD Martin <dick93...@gmail.com> wrote: > If you have to use gas, use Helium. It is very good especially at reduced > pressures where the mean free path approaches the dimension of the > container. > > Dick Martin KN6AA > > On Sat, Jul 25, 2020, 07:37 W2xj <w...@w2xj.net> wrote: > > > I would avoid that in ham or broadcast transmitters due to the potential > > skill sets (or lack thereof)of end users. Hydrogen is too explosive in > the > > wrong hands. > > > > Sent from my iPad > > > > > On Jul 25, 2020, at 6:41 AM, Rich NE1EE <73.de.ne...@gmail.com> wrote: > > > > > > If you're up to the challenge, hydrogen is a great for cooling. Very > > nice thermal conductivity and thermal capacity. I've worked on systems > that > > used it for cooling. > > > > > > ~R~ > > > 72/73 de Rich NE1EE > > > On the banks of the Piscataqua > > > > > > ______________________________________________________________ > > > Elecraft mailing list > > > Home: http://mailman.qth.net/mailman/listinfo/elecraft > > > Help: http://mailman.qth.net/mmfaq.htm > > > Post: mailto:Elecraft@mailman.qth.net > > > > > > This list hosted by: http://www.qsl.net > > > Please help support this email list: http://www.qsl.net/donate.html > > > Message delivered to w...@w2xj.net > > > > > > > ______________________________________________________________ > > Elecraft mailing list > > Home: http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/mmfaq.htm > > Post: mailto:Elecraft@mailman.qth.net > > > > This list hosted by: http://www.qsl.net > > Please help support this email list: http://www.qsl.net/donate.html > > Message delivered to dick93...@gmail.com > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to ai4ns.m...@gmail.com ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
