This guide provides an overview of a fascinating example involving mass marketing, technology and stamp collecting! With the end of World War I the world awakened to many new technologies, including commercial...
QSL stands for “I acknowledge receipt,” or “I hear you.” It comes from the Q codes, a set of radio shorthand developed by the British government around 1909, which were in turn based on similar codes developed...
One of the big fads of the 1920s was the radio verification stamp. With a letter to a station about their programs and a dime, a listener could get a handsome stamp with the station’s call sign, made for the...