Detail map of Pittsburgh, Pennsylvania, United States Overview map of Pittsburgh, Pennsylvania, United States

A: Pittsburgh, Pennsylvania, United States

KDKA Transmits the First Commercial Radio Broadcast

11/2/1920
Photograph of the 9th floor KDKA transmission room. c. 1921
Photograph of the 9th floor KDKA transmission room. c. 1921

On November 2, 1920 KDKA, a Pittsburgh, Pennsylvania Westinghouse station, transmitted the first commercial radio broadcast.

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