plate modulation การใช้

• plate modulation, are the workhorses of international shortwave broadcasting, including numbers stations.
• Electrically, AN / ARC-5 transmitters use high-level final amplifier plate modulation, and the output tank circuit is shunt high voltage fed.
• High level plate modulation consists of varying the voltage on the plate ( anode ) of the valve so that it swings from nearly zero to double the resting value.
• In the 1920s, Loy Barton, an engineering graduate student at the University of Arkansas, set forth the principle of high-level Class B plate modulation for radio transmission and developed the technology that allowed small-and medium-size AM radio stations to flourish across the United States.