The thermionic vacuum tube and its applications (1920)
Van der Bijl, Hendrik Johannes, 1887- · New York McGraw-Hill Book, Co · leaf 363
eard in the receiver T is equal 340 THERMIONIC VACUUM TUBE to the detecting current coming from the detector tube D. Bymeans of the switch W either the detecting current or the currentfrom the generator U can be passed through the telephone receiver.If the switch is thrown to the left the current… … \smj-
Telegraph, Wireless
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
