Practical wireless telegraphy; a complete text book for students of radio communication (1917)
Bucher, Elmer Eustice, 1885- · New York, Wireless Press, Inc · leaf 170
e shownin Fig. 179. From the viewpoint of mechanical construction, it is practicallyidentical with the Fleming valve, with the exception that a metallic element knownas a grid is placed in the path of the electrons flowing from the filament to theplate. This grid may be made up of a zig-zag shaped… … Fig. 179—Fundamental Circuit for Valve. the Three Element Oscillation \ / adopted for the three \ element valve appears in Fig. 179, where the pri-mary and secondary cir-cuits of a receiving tunerare represented by theusual notations and thegrid, plate and filamentof the valve by G, P, andF,…
Telegraph, Wireless
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