The thermionic vacuum tube and its applications (1920)
Van der Bijl, Hendrik Johannes, 1887- · New York McGraw-Hill Book, Co · leaf 344
as such a value that the maximum negative potential of the gridbecomes equal to CF (Fig. 189), the current is reduced to zero andthe modulated output wave then takes the form shown in Fig. 191.The wave can then be said to be completely modulated. Whenthis happens the coefficient B in equation (12)… … Fig. 191. modulated as will become evident later on when we come to con-sider measurements on the detecting efficiency of tubes. The second term in equation (11) gives a measure of the extentto which a wave is modulated. The coefficient a2 is given byequation (8), namely, 1 (12= —^ 9 / 2 (r,+ro)^…
Telegraph, Wireless
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