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In page Wardenclyffe Tower:

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At this point, Marconi was transmitting radio signals beyond the range most physicists thought possible (over the horizon) and the description of the Italian inventor's use of a "Tesla coil" "connected to the Earth" led Tesla to believe Marconi was copying his earth resonance system to do it.[1][3] Tesla, believing a small pilot system capable of sending Morse code yacht race results to Morgan in Europe would not be able to capture the attention of potential investors, decided to scale up his designs with a much more powerful transmitter, incorporating his ideas of advanced telephone and image transmission[citation needed] as well as his ideas of wireless power delivery.