English

Experimental wireless stations : their theory, design, construction and operation; a complete account of sharply tuned modern wireless installations for experimental purposes which comply with the new wireless law, with more than 80 illustr

CONTENTS CHAPTER I NATURE OF WIRELESS TRANSMISSION Theory; Action of Radiant Waves; Interference; How Signals Are Sent; Wave Lengths Used 11 CHAPTER II AERIALS The Antenna; Dimensions; Supports; Height and Length; Various Types; 200 Meter Design; Table for Various Wave Lengths; Radiation Resistance; Capacity and Inductance; Insulation and Construction; Poles and Guy Wires 23 CHAPTER III COIL AND SUB-SURFACE SYSTEMS Multi-Turn Coil Receiver; Portable Receiving Long Distance Set; Principle of Coil Action; Directional Effects of Coils; Types and Construction; Radio Compass. Sub-Surface Radio; Antenna Buried Underground; Roger's System; U. S. Navy Experiments 48 CHAPTER IV GROUNDS AND LIGHTNING PROTECTION Ground Connections; Various Types; Construction; Lightning Protectors; A Safe Radio Station; Underwriter's Rules 57 CHAPTER V THE TRANSMITTER AND RESONANCE Transmitting Circuit; Principle of Oscillations; Action of Energy; Resonance; Period of Vibration; Adjustments; Harmonic Effects; Resistance; Beats; Typical Curves for Various Transmitters; Damping; Relation of Antenna Current and Voltage; Experiment Illustrating Coupling 65 CHAPTER VI WAVE LENGTH, CAPACITY, AND OSCILLATION CIRCUIT

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