Radio Telephony

DIO TELEPHONY a RADIATIO O N F MODULATED ENERGY. b CAUSES OF SPEECH D I S T O R T I O N - C in e rt ia v - r ec eiver distortion-transmitter distortion. C NON-LINEA A R M PLIFICATION AND SPEECH DISTORTION-types of distortion. d SECRECY OF COMMUNICATION IN RADIO TELEPHONY. e STRAY INTERFERENCE IN RADIO o - t r a n s m i s s i o n factor of safetyH- assistance of context. CHAPTER 11. ......................................................... 21 6. SUSTAINED NAVE GENERAT, ORS. a ARCS-Duddetl-Poulsen arc-Poulsen arc-Fullers method of increasing output . efficiency-arcs of Danish Continental Syndicate- flywheel circuitH-arcs of Berliner Company-arcs of Lorenz Company-arcs of Federal Telegraph Compariy-experiments of Majorana-arcs of Telefunken Company-arcs of Colin and Jeance. CHAPTER 111. ........................................................ 44 - b RADIO-FREQUENSTP ARKS-inverse charge frequency4xperiments of Ruhmer-xpekiments of Dubilier-Lorenz Com any multitone system-system of von Lepel-experiments of Chaffee, and Cutting and Washington-Ditcham system-T. Y. K. system-Hanscom transmitter - de Forest D. C. and A. C. systems-experiments of Moretti--experiments of Vanni-experiments of Goldschtnidt and Scheidlt-Boon-experiments of hlarzi brathers-Marconis timed spark method. 1V Contents CHAPTER IV. ........................................................ 76 c VACUUM T UBE OSCILLATORS-DUS d at a-teSm perature and space charge limitation of plate current-thermionic currents in filament-White filament supply methodgrid potential control of plate current-tube amplification of alternating current-self-excited oscillations-oscillating circuit of Meissner-Marconi-Franklin circuits - de Forest ultraudion and other circuits-high power tubes-General Electric Company pliotrons-oscillating circuit of General Electric Company-Western Electric Company tubes-experiments of Colpitts-experiments of Heising-Nicolson tube-General Electric Company dynatron and pliodynatron-Hulls dynatron amplifier and oscillator-Hulls pliodynatron controlled oscillator. CHAPTER V. ..................... . . ................................. 103 d T E R N A T R O S F RADIOF REQUENCY-problem of construction - types of solution-Goldschmidt alternator-frequency multiplication by internal reflectionH-constructional details-principle of ferromagnetic frequency multiplier-Telefunken Company frequency doublers and triplers-Arco alternator of Telefunken Company-Alexanderson alternator-constructional details-electrical characteristics-Experiments of Fessenden and National Electric S i n a l i n C o m anv-ex eriments of General Electric an- le andkrson-tr iple frequency alternator. CHAPTER VI. ........................................................ 1 27 7. MODULATION CONTROL IN RADIO TELEPHONY. a DEGREE OF CONTROL-modulation characteristic-linear and non-linear modulation control-actual characteristic. b STABILITY OF CONTROL-static and dynamic characteristics. c RATING OF RADIOPHONE TRANSMITTERS...