The three jewels of Marconi: Most men achieve greatness with one idea; the Father of Radio produced two more

Aboard his yacht Elettra, Guglielmo Marconi first used frequencies of about 500 MHz over long paths up to 250 km 6368669 almost nine times the optical distance. He was well aware that his observations did not square with accepted theory of the day. In fact, he noted: “The speculations that may arise from such results concern the entire theory of radio transmission over distances greater than the optical one.”