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.