As radio developed in the early 1920s, the focus for most people was the AM band and stations such as KDKA, the first broadcast station. There was, however, ano

Shortwave broadcasting originated in the 1920s, when stations used the new technology to increase their range in order to serve foreign audiences and reach part

"This book presents the histories of the major North American shortwave clubs and reviews the professional and listener-generated shortwave literature of the er

The discovery and development of shortwave technology during the 1920s and 1930s permitted radio stations worldwide to transmit their programs over long distanc

In July 1923, less than three years after Westinghouse station KDKA signed on, company engineer Frank Conrad began regular simulcasting of its programs on a fre