Radio Broadcast (May 1928-Apr 1929)

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In the Grand Canyon of the Colorado A PORTABLE radio receiver in use in the Grand Canyon in 1923. A special receiver was built for the expedition by the Bureau of Standards which was carried on a geological survey of the Canyon under the auspices of the United States Geological Survey. This illustration is from a photograph by Lewis R. Freeman, of the Explorers' Club, New York, who was a member of the expedition. Mr. Freeman explains that at the time the expedition was undertaken, there was some doubt as to whether radio reception would be possible in the Canyon. It was conclusively demonstrated that excellent reception was possible. The receiver performed as well at depths of 500 feet as at 5000, Mr. Freeman says. The antenna in the illustration also, it seems, served the party as a clothesline. 64