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Chapter Page INTRODUCTION
RADIO TRANSMISSION AND RECEPTION
THE AUDIO OSCILLATOR
7 other sections not shown
adjusted alternating current amateur amount amperes amplitude antenna audio amplifier audio oscillator battery beat frequency beat note receiver broadcast stations bulb called capacity cause chassis class B amplifiers coil and condenser connected construction current flows cycles per second denser diagram diode direct current dry cell earphones Eglp curve electrical electromotive force electrons filament grid bias grid circuit grid leak headphones headset heard heat high frequency incoming signal insulation iron lator magnetic field metal meter microphone mixer mmfd modulation negative number of turns Ohms Ohms Law operation oscillation control output phones plate circuit plate current positive produce prong tube quency radio frequency radio frequency amplifiers radio waves resistance resistor resonant schematic symbol screw secondary winding solder sound stage superheterodyne terminal tion transformer transmitter transmitting antenna triode tube socket tuned circuit tuning condenser unit vacuum tube varies volts volume wire