The thermionic vacuum tube and its applications (1920)
Van der Bijl, Hendrik Johannes, 1887- · New York McGraw-Hill Book, Co · leaf 255
etween plate and grid; r = diameter of grid wires; n = number of wires per unit length. 232 THERMIONIC VACUUM TUBE C is a constant which for the parallel-plane tj^pe of tube (see Fig.68) has a value of 80. Since this equation is non-dimensional,C is independent of the sj^stem of units used in… … e 8 10 Humber of Grid Wires Per Cm. Fig. 122. Equation (79) has been determined from measurements madeon a large number of carefully constructed tubes in which not onlythe quantities given in the equation were varied, but also thedistance between filament and plate, and the distance betweenfilament…
Telegraph, Wireless
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