The thermionic vacuum tube and its applications (1920)
Van der Bijl, Hendrik Johannes, 1887- · New York McGraw-Hill Book, Co · leaf 277
-ence between filament and plate of tube A. To avoid this thenegative voltage Eg is applied to the second grid to give it theappropriate negative potential with respect to its filament. Tliis non-inductive type of amplification circuit is a veryimportant contribution made possible by the thermionic… … Fig. 144. currents of very low frequency, such as are used on telegraph linesand especially on submarine telegraph cables. Transformers forsuch frequencies are unpractical, being costly and inefficient.Besides, they distort the wave form which it is very desirable topreserve. Even when dealing with…
Telegraph, Wireless
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
