Depiction of radio transmission and reception through diagrams.
United States USA Date:1941 Duration:10 min 38 sec Sound:NO SOUND
Radio transmission and reception. Electromagnetic waves come in contact with antenna. Animation shows electromagnetic waves passing. A tuning coil is placed in antenna for better connectivity. This process adjusts antenna frequency. Diagram shows the tuning coil with a pendulum. The dots traveling on circuit show the frequency of reception. Diagram shows water line and the pebble. The filament circuit heats up. Incoming waves in the grid. Man holds torch in hand and opens it. Coil is placed on each end of magnet. Sound waves reduced from entering the diaphragm.
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