Television: From Mechanical to Electronic Systems

The transcript discusses the evolution of television technology, starting with Baird's mechanical system using rotating discs and 30 vertical lines. It highlights the transition to electronic systems with cathode ray tubes, despite challenges with early camera tubes. By 1930, semi-regular test transmissions were conducted in Britain, with sound added in France and Germany. In 1936, trials at London's Alexandra Palace showcased EMI's high definition system, which sent 25 images per second with 405 lines, setting the foundation for modern television.

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