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make your own vacuum tubes?

Posted: Mon Jan 07, 2008 8:57 pm
by hanelyp

Posted: Tue Jan 08, 2008 4:37 pm
by MSimon

Roll your own cathode tubes

Posted: Wed Jan 09, 2008 4:02 am
by hanelyp
Along the same theme, Roll your own cathode tubes.
via ... e_tub.html
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