Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!samsung!munnari.oz.au!goanna!dnl From: dnl@goanna.cs.rmit.oz.au (David "IGOR" Latter) Newsgroups: sci.electronics Subject: Re: Has anyone made any homemade valves (tubes), semiconductors ... Summary: reference wanted Message-ID: <3496@goanna.cs.rmit.oz.au> Date: 31 Jul 90 23:42:17 GMT References: <10368@crdgw1.crd.ge.com> <872@massey.ac.nz> <37291@shemp.CS.UCLA.EDU> Organization: Comp Sci, RMIT, Melbourne, Australia Lines: 14 >Scientific American published articles on making your own HeNe LASER >back in the late 60's/ early 70's that among other things detailed >making your own getters to purge the LASER tube. (I remember it >because my buddy and I tried to make a LASER as a high-school Does anyone know the issue that this appeared in? I am currently setting up a pumping system to resore vintage radio tubes and would find the information interesting. Eventually I intend to re-create replacement parts for pre 1930 radio gear for the Historical Radio Society of Australia members. David.