two-way radio systems

Radio has played a role in world politics and strategy since its invention ... In the same year Navy radio proved its usefulness in a national emergency ... Aug 7, 2023 ... KDAY became the country's first radio station to play hip-hop on a full-time basis. In addition to programming the more established East Coast ... In 1893 the inventor Nikolai Tesla demonstrated a wireless radio in St. Louis, Missouri. Despite this demonstration, it was Guglielmo Marconi who is often ... Feb 25, 2016 ... Fessenden also developed a more effective way of sending Morse code than Guglielmo Marconi, the original inventor. This was a few years before ... The station's creator and owner, an entrepreneur, inventor, and manufacturer named Powel Crosley Jr. ... He agreed to buy his nine-year-old a radio, but when he ... We are grateful to our customers for enjoying the ride with us for the past century, and we're eager for the next hundred years. Time Flies. Enjoy the Ride ... Tesla actually invented the idea of radio in 1892 — not too long after Heinrich Hertz demonstrated UHF spark wireless transmissions in Germany in 1885. In 1898, ... May 12, 2022 ... ... invention." The wireless became the only way for survivors on board the RMS Carpathia to contact their families. Since messages were charged ... Aug 3, 2023 ... He used a spark gap attached to an induction coil and a separate spark gap on a receiving antenna. When waves created by the sparks of the coil ... Oct 30, 2020 ... In 1920, employees of inventor and industrialist George Westinghouse hit upon an idea to boost radio sales by providing programming that ...