1.Previous
3.Next

used crude spark transmitters capable only of sending the dots and dashes of Morse code. In the early 1900s, the first audio-capable transmitters were developed. Although these were initially used for point-to-point communication, there was also experimentation with broadcasting news and entertainment. Many of the earliest test transmissions functioned as advertisements for their owners and their new technologies. Stations soon began playing phonograph records

1.Previous
3.Next