AF amplifier AFC RF amplifier amplifier baffle bypass cabinet capacitor chassis coil condenser console detector dial exciter filter frequency control heater heterodyne housing inductor knob lead-in wire on-off switch output transformer parasitic suppressor phase control potentiometer power pack power plug power supply power transformer preamplifier preselector program discriminator radio radio set radio telescope radio-frequency amplifier receiver receiving set resistor rheostat selector selsyn set speaker tone control transformer transistor trimmer volume control wave trap wireless wireless set