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Article #5366Re: Has anyone made any homemade valves (tubes), semiconductors ...
From: George Noyes
Date: Mon, 30 Jul 1990 21:49
Date: Mon, 30 Jul 1990 21:49
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In article <10368@crdgw1.crd.ge.com>, perley@galaxy (Donald P Perley) writes: > In article <37291@shemp.CS.UCLA.EDU>, cccph@eel (Charles Hobbs) writes: > >In article <872@massey.ac.nz> GMoretti@massey.ac.nz (Giovanni Moretti) 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? > "Getters" - typically barium, sometimes cesium or other metals that are highly reactive to oxygen (and sometimes nitrogen). Magnesium and "Lime (Calcium carbonate)" have been used in antique (pre 1930) tubes. fyi george noyes, W1XE
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arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!uakari.primate.wisc.edu!pikes!mercury.cair.du.edu!isis!nbires!stcvax!ginReferences:
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!uakari.primate.wisc.edu!pikes!mercury.cair.du.edu!isis!nbires!stcvax!gin From: gin@stcvax.STORTEK.COM (George Noyes) Newsgroups: sci.electronics Subject: Re: Has anyone made any homemade valves (tubes), semiconductors ... Summary: getters Message-ID: <367@stcvax.STORTEK.COM> Date: 30 Jul 90 21:49:56 GMT References: <872@massey.ac.nz> <37291@shemp.CS.UCLA.EDU> <10368@crdgw1.crd.ge.com> Organization: Storage Technology Corp. Louisville, CO Lines: 20