MAKE A MEME View Large Image 6P1P trio.JPG A comparison of vacuum tubes 6P1P by Svetlana 1971 left 6P1P-EV by Svetlana 1986 6P1 by Beijing Electron Tube Factory 1986 right Own 2007-01-12 Tvezymer Beam tetrodes Trios
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Keywords: 6P1P trio.JPG A comparison of vacuum tubes 6P1P by Svetlana 1971 left 6P1P-EV by Svetlana 1986 6P1 by Beijing Electron Tube Factory 1986 right Own 2007-01-12 Tvezymer Beam tetrodes Trios
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