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I presume you are posting this as evidence that the earth is flat? If so then you do not understand how radio signals in the AM band propagate through the ground wave effect, and not line of sight like the higher frequencies.-
At 500 Kilowatts WLW could reach: It was truly “The Nation’s Station.”
The coverage from this station was enormous. Operating at 500 kilowatts, the 390-Ohm base impedance ran some 35 Amperes of RF. The unmodulated signal produced a RF field intensity of at least 6 Volts per meter at a distance of one mile from the tower. At night, the signal regularly went from Maine to Southern California and Mexico.
Requests came from daytime listeners in Hawaii and from Buckingham Palace.
Broadcasts were heard regularly in Columbia, South America. (Time Magazine Letters May 11, 1936)
Centenary Radio: WLW – The "Big One" in US Broadcasting
Radio propagation - Wikipedia.
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