The principles underlying radio communication (1922)
United States. National Bureau of Standards, Ould, Richard Sheldon, 1889-, United States. Army. Signal Corps · Washington, Govt. Print. Off. · leaf 473
8 9 10 II 12 13 14 15 … Fig. 265.—Practical forms of three-electrode electron tubes.470 PRACTICAL FORMS. 471 tended to operate on short wave lengths, the idea of the con-struction being to keep the connections to the grid and plate
Telegraph, Wireless · Radio
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