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Special Tube Types
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a-c voltage action anode current anode potential anode voltage applied armature battery bias capacitor cathode and anode cathode heater cathode potential charge coil conduct connected constant contactor control circuit control grid current flow curve d-c supply decrease desired discharge drop effect Elec electrical electron flow electron tube electronic circuit electronic control elements emission energy field filament filter frequency gas-filled tube glass grid potential half cycle heat heater ignitron impedance increase inductance industrial electronic input insulated ionization lens light load maximum megohms meter motor negative normally obtained ohms operation oscillator output parallel peaking transformer pentode permit phase phase-shift photoelectric phototube plasma plates pliotron potentiometer primary reactance relay resistance resistor resonant reverse saturable reactor screen grid secondary signal sine wave speed suppressor grid switch temperature thyratron triode usually vacuum tube vector voltage divider volts weld welder winding wire zero