The thermionic vacuum tube and its applications (1920)
Van der Bijl, Hendrik Johannes, 1887- · New York McGraw-Hill Book, Co · leaf 145
does not amount to more than a few hundred volts, the full voltage of the generator is impressed on the valve during the blocking half period. The tube must therefore be evacuated to such an extent that the high voltage does not start a glow discharge. This necessitates clearing the elec-trodes and… … Fig. 49. RECTIFICATION OF CURRENTS BY THERMIONIC VALVE 123 the power that could safely be dissipated in it is about 10 watts percm^.^ This corresponds to a temperature of about 1600° K. If theanode temperature rises above this value the anode emits electronsat a sufficiently high rate to make the…
Telegraph, Wireless
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