The fourth annual National Radio Exposition took place from the 12th to 19th September 1925 at Grand Central Palace on Lexington Avenue in Midtown Manhattan, New York City.
An impressive number of radio expositions took place across North America from August 22nd to November 22nd 1925 (GD) :
Radio World (August 22, 1925)
The Rapid Gain Of The U.S. Public Interest In Radio
" In 1922 there were hardly 100,000 radio sets in use; in 1923 the number had grown to 2,000,000; in 1924 to 3,750,000 and by the end of 1925 it is estimated that the number of sets in use will reach a total of 5,000,000.
The retail value of sets and parts has grown from $50,000,000 in 1922 to an estimated $500,000,000 in 1925, one of the most stupendous growths in history.
Public interest in radio has gained rapidly and apparently has continued un- abated ".
Radio World (August 22, 1925).
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