Elements of Radio |
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A-F AMPLIFIER alternating current alternating-current ammeter amperes amplifier tube amplitude antenna coupler antenna-ground system armature audio battery called capacitance carrier carrier wave cathode cathode-ray conductor connected coupling crystal current flowing cycles per second detector Diagram showing diode direct current direct-current distortion effect elec electric current electrical energy electromagnet electromotive force electron stream feedback filament filter fluctuating frequency galvanometer graph grid bias half-wave impedance inductance inductor input lines of force loop magnetic field meter method modulation negative charge ohms oscillator output phones plate circuit plate current plate voltage pole positive charge power tube primary PROBLEM quency radiation radio receiver radio wave radio-frequency amplifier radio-frequency current reactance resistance resistor resonant circuit rheostat screen grid secondary shown in Figure signal sky wave stage station superheterodyne receiver transformer transmission line transmitter triode tuner tuning circuit variable capacitor varying voltage drop volts wire