1 page matching crystal radio variable-capacitor in this book
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adjusted alternating current alternating-current ammeter amount ampere-hour antenna circuit applied armature audio audio frequency auto alarm band battery broadcast calibration capacity carrier cell charge choke coil coil condenser conductor connected contacts coupling crystal current flow curve cycles detector diagram direct current direct-current direction finder effect electrical electrolyte electrons energy equipment filament filter frequency grid ground impedance increase indicated inductance input installation intermediate frequency kilocycles load loop magnetic field maximum meter microphone modulation motor negative normal obtained ohms operation oscillator output panel phase plate circuit plate current plate voltage position potential power-amplifier radiation radio radio direction finder radio-frequency radio-frequency amplifier reactance receiver rectifier relay resistance resistor resonance result rheostat secondary shown in Fig shunt signal stations supply switch terminal tion transformer transmitter tuning unit vacuum tube voltmeter volts watts wave Western Electric winding wire zero