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 73
Ffl. Battery - OscillationGenerator … FilamentRheostat 7~\ Fig. 28—Schematic circuit for the production of beats. produced by a local oscillation generator whose frequency is101,000 cycles per second. Both are radio frequencies andneither by itself produces any audible response in the telephonereceiver. Now, the local oscillations are…
Vacuum-tubes · Radio
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