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Published on: VG

November 1901 – September 1902

Long Island, New York. Nikola Tesla builds the Wardenclyffe Tower. This is a tower for transmitting radio signals worldwide through the ground. It has a hemisphere on top, 21 meters in diameter and weighs 55 tons. It is constructed of pine wood for electrical insulation. It can be seen from New Haven, Connecticut. There are also underground structures extending 40 meters into the ground, the purpose and function of which are unclear. Boilers produce power (200 kW) through a 44,000-volt, four-phase AC generator, and the frequency can be varied between 1,000 Hz and 200,000 Hz. Tesla plans to send these electromagnetic waves across the planet and reflect them back to Wardenclyffe, to establish standing waves by exploiting the Earth’s resonance. His tests in Colorado led him to believe the frequency is 6 Hz. Recent measurements put this value at 8Hz, suggesting he wasn’t off the mark. Tesla’s goal, however, was even more ambitious: to allow anyone in the world to connect to the ground and receive electrical power and an electromagnetic signal with information. Tesla never explained how the electrical signal would return to complete the circuit.