The thermionic vacuum tube and its applications (1920)
Van der Bijl, Hendrik Johannes, 1887- · New York McGraw-Hill Book, Co · leaf 370
circuit whereby detectors can be compared is shown inFig. 206. The input voltage can be adjusted to the desired valueby adjusting the resistance r and need not be known accurately,it being sufficient to know that it lies within the range of voltagesused in practice. By means of the switch W either… … Fiu. 20G. the shunt into or out of the circuit according as W connects thetube of higher or lower efficiency. The capacity C is a radio fre-quency leak and the output circuit is connected across the chokecoil, which insures that the d-c. potential on the plate remainsconstant for all adjustments of…
Telegraph, Wireless
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