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 476
h tubes. Tubes Nos. 16,17, 18 are intended primarily for receiving, but are also usedto some extent for transmitting. Tube No. 16, which has twoprojections at the top, is designed primarily for apparatus in- 4 4fL |: J, J hit 1 2 3 4 1 ,1 i ■ 1 i J i 5 8 9 10 11 12 13 14 15 ff 16 17 18 19 20 Fig.… … Fig. 266.—Large transmitting tubes. as widely separated as possible to minimize the capacity be-tween them. In all these French tubes the filament is straight,the grid is a spiral wire surrounding the filament, and the plate 472 ELECTROS TUBES. Is a cylinder surrounding both. Tubes Nos. 17 and 18…
Telegraph, Wireless · Radio
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