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Title: Collection of early VALVES [Go to resource]
Description: Collection of early VALVES, comprising: - 3 soft "Round" receiving Valves, c.1916; 1 V24 Valve; 1Q Valve; 1 FEI(space charge tetrode); 1 French "Bigril" tetrode; 2 French R Type; 3 British "R" and 1 D.E.R. License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Source: Science Museum Identifier: 1947-303 Go to resource More Like this...
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