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From: taber@ultnix.enet.dec.com (Patrick Taber)
Newsgroups: sci.electronics
Subject: Re: Has anyone made any homemade valves (tubes), semiconductors ...
Message-ID: <2310@ryn.esg.dec.com>
Date: 26 Jul 90 18:44:26 GMT
References: <10368@crdgw1.crd.ge.com> <872@massey.ac.nz> <37291@shemp.CS.UCLA.EDU>
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Reply-To: taber@ultnix.enet.dec.com (Patrick Taber)
Organization: Murder Inc.
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In article <10368@crdgw1.crd.ge.com>, perley@galaxy (Donald P Perley) writes:
|> >You could do this successfully if you had some way of getting a  
|> >good vacuum. (Commercial valves have chemical compounds known as
|> >"getters" which aid in removing oxygen from the valve)
|> 
[...] 
|> I'm not sure what is in the getters.. maybe those could be homebrewed
|> as well?

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
science project.  We got a nice tour from the folks at MIT out of it.
Sadly, our mirror mounts never worked out.)

                                             >>>==>PStJTT
                                     Patrick St. Joseph Teahan Taber

My employer doesn't care what I think.  I, in turn, don't care what
you think.  You probably don't care what my empolyer thinks.  Thus is
life a circle.