Show Functions of Parts of j Radio Receiving Sets Antenna Converts radio waves into an alternating current of high frequency. fre-quency. Inductance coil Together with tb antenna forms a circuit which can ba tuned to respond to the Incoming radio ra-dio wave. ! Series condenser Shortens the pe-1 riod in which the antenna responds. ! Inductance (secondary) Provides-rough Provides-rough tuning of the desired wave. Secondary condenserProvides fine-adjustment fine-adjustment of the secondary circuit. : Detector tube Changes the alternating alter-nating current into a pulsating current cur-rent and amplifies it. ' "A" battery Provides current to heat the filaments of the tubes. "B" battery Supplies current through the tube between plate and filament. Rheostat Provides means of regulating regu-lating the current to the filaments of tubes. Telephone Converts the electrical currents into audible sound. Tickler coll Feeds the effect of the current in the plate circuit back into the grid circuit to be reampllfled. j Grid leak and condenser Adjusts voltage on the grid to a value giving sensitive action of tube as detector. Potentiometer Provides fine adjustment adjust-ment of plate voltage. Telephone condenser Provides pnth for radio frequencies that Is much easier eas-ier than through the telephone. Amplifier tube Converts the small power and voltages applied to the grid into larger voltages and power at the plate. ! Amplifier transformer Converts the small voltages applied to the Input side Into larger voltages ot the output side. j |