In the early 20th Century, crystal radios were immensely popular until most were replaced by vacuum tube receivers in the mid-1920s.
Charles Correll & Freeman Gosden as Amos and Andy 1929, Wikimedia Commons.
American Radio
Aug 14, 2011
In the early 20th Century, crystal radios were immensely popular until most were replaced by vacuum tube receivers in the mid-1920s.
Charles Correll & Freeman Gosden as Amos and Andy 1929, Wikimedia Commons.