. 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 . -smfo-1—I—II—1A~ joj OridWof. Variable Coupling PlateBattery or Phones ■Negative Plate BatteryTerminal Grounded here(Puts that Terminal atGround Potential toAvoid Capacity Effect) W G
. 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 . -smfo-1—I—II—1A~ joj OridWof. Variable Coupling PlateBattery or Phones ■Negative Plate BatteryTerminal Grounded here(Puts that Terminal atGround Potential toAvoid Capacity Effect) W GroundFig. 42—Three Circuit Regenerative Receiver for Short and Medium Waves. In Fig. 43 is shown the schematic circuit of a two stageaudio-frequency amplifier coupled to a detector. If in any ofthe previous circuits the grid circuit of the first amplifiertube is connected into the plate circuit of the detector tube(through the transformer) in place of the telephone receivers,the detector energy at audio-frequency may be amplified. Theconnections are only shown for one type of detector operating point must be adjusted to the straight portion ofthe characteristic curve in the case of each of the amplifiertubes in order to avoid distortion effects. This is done byapplying a normal negative potential to the grids in the manner 104 A B C OF VACUUM TUBES shown and by adjusting the plate battery voltage and filamentcurrent to
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Keywords: ., bookcentury1900, bookdecade1920, bookidabcofvacuumt, bookyear1922
