A-26. An energy converter that changes sound energy into electrical energy.
A-27. The changing resistance of carbon granules as pressure is applied to them.
A-28. Background hiss resulting from random changes in the resistance between individual carbon
A-29. The piezoelectric effect.
A-30. A dynamic microphone has a moving coil and the magnetic microphone has a moving armature.
A-31. Rf and af units.
A-32. 100 kilohertz, 5 kilohertz, 95 kilohertz, and 105 kilohertz.
A-33. All of the sum frequencies above the carrier.
A-34. The intelligence is contained in the spacing between the carrier and sideband frequencies.
A-35. The highest modulating frequency.
A-36. The depth or degree of modulation.
A-37. One-half the amplitude of the carrier.
A-39. Modulation produced in the plate circuit of the last radio stage of the system.
A-40. Class C.
A-41. Power amplifier.
A-42. Between 0 and nearly two times its unmodulated value.
A-43. Plate modulator.
A-44. In cases when the use of a minimum of af modulator power is desired.
A-46. Gain is varied by changing the voltage on the emitter.