Principles of Radio Communication
John Wiley & sons, Incorporated, 1921 - Amplifiers, Vacuum-tube - 935 pages
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adjusted alternating current ammeter amperes amplifier amplitude antenna circuit antenna current battery capacity cent charge coil component conductor connected constant coupling crystal detector cuit current flowing cycles damped decrease decrement detector diaphragm dielectric effective value electric field electrons energy equal equation excitation farads filament current flux given grid condenser grid potential hence high-frequency current impedance impressed increase indicated in Fig inductance input circuit insulated leak resistance loading coil magnetic field meters microhenries modulated negative obtained ohms operation oscillating circuit output phase phones plate circuit plate current plate voltage primary produce radiation radio radio frequency reactance receiving antenna receiving circuit rectifier resonance secondary shown in Fig signal sine wave skin effect spark gap station switch telephone Test transmitter tuned vacuum tube variation varies velocity volts wave wave-length wave-meter wire zero