Philco Radio Atlas of the World, 1935

Philco Radio Atlas of the World (1935): pp 2-3. Musée des ondes Emile Berliner.
This map of the world shows all of the shortwave radio stations around the globe in 1935. Listeners could tune in to stations from other continents if they listened in at the right time. This “radio atlas” helped radio listeners visualize the way they could travel the globe with their shortwave radio sets.