The A B C of vacuum tubes in radio reception; an elementary and practical book on the theory and operation of vacuum tubes as detectors and amplifiers. Explains non-mathematically the fundamental principles upon which all vacuum tube circuits are based. Includes practical circuits and practical questions and answers. It is written especially for the beginner. All electrical and radio terms are fully explained (1922)
Lewis, Elmer Hugh, 1889- · New York, Norman W. Henley Pub. Co. · leaf 58
gas in a detector tube—Heterodyne action or the pro-duction of beats. The Telephone Receiver When ether waves are produced at a distant transmittingstation and, in turn, cause oscillating electric current to flow ina receiving antenna, it is necessary to provide some kind of anindicator which will… … Soft IronDiaphragm Ordinary Receiver Fig. 21—Construction of a typical telephone receiver. oscillations into audible sound so that signals may be perceivedby the sense of hearing. A telephone receiver, the constructionof which is shown in Fig. 21, has two coils of wire, eachwound in many layers…
Vacuum-tubes · Radio
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