January 13, 1910 –
Lee De Forest, the American inventor of the vacuum tube, demonstrates the first radio broadcast, a live performance of Cavalleria Rusticana with Enrico Caruso from the Metropolitan Opera, on this date.
The broadcast over a telephone transmitter could be heard only by the small number of electronics hobbyists who had radio receivers or could squeeze into telephone booths. De Forest started regular nightly concerts in 1915, increasing interest in radio receivers, which at the time depended on the vacuum tubes manufactured by De Forest’s company.
How convenient.
The Haus of Dcaligari 