Audels Electronic Devices:

adjusted alternating current amount of light amperes amplifier tube anode anode current anode voltage applications atom AUDELS battery calibrated capacitance cathode characteristics condenser conductor connected contactor Control Grid controlled vapor discharge Courtesy General Electric current flow desired device diagram diode direct current disk door electrons emission filament foot-candles frequency galvanometer grid bias grid controlled vapor grid voltage heat heater illumination impedance indicating instantaneous instrument lamp light beam light intensity light source load luminous flux Maximum measured mechanical megohm metal meter mirror motor negative neon lamp ohms operation oscillator Pages pentode photo-electric tube photocell photoelectric cell phototube phototube amplifier plate current plate voltage positive potential potentiometer radiation radio recording element rectifier relay coil resistance resistor rotating screen grid selenium sensitive shown in fig speed standard surface switch temperature thyratron Thyratron Tube transformer triode vacuum tube vapor discharge tube volts welding wire zero