The thermionic vacuum tube and its applications (1920)
Van der Bijl, Hendrik Johannes, 1887- · New York McGraw-Hill Book, Co · leaf 354
is usually secured by putting in the negative grid battery Eg. DETECTION OF CURRENTS WITH THE VACUUM TUBE 331 In practice, especially when receiving weak signals, it is usuallynot necessary to insert this battery because the potential varia-tions impressed on the grid seldom exceed a small fraction… … 40 fcO Plate Voltage Fig. 197. the filament and the system constituting grid and plate. Thequantity e in the characteristic equation gives a measure of thiseffect. If the filament, grid and plate are of the same material ewill usually be practically zero, but if the filament is, for example,of a…
Telegraph, Wireless
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