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2 ноя 1920 г. - First commercial AM radio signal

Описание:

The first commercial AM radio signal is made by KDKA Pittsburgh. They chose to debut the signal on election day so they could broadcast the results.

Добавлено на ленту времени:

History of Media

ByMk Palazzola
22 окт 2018

Дата:

2 ноя 1920 г.
Сейчас
~ 103 г назад

Изображения:

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