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Radio Record, Volume I, Issue 13, 14 October 1927, Page 4

Herbert HI, Frost, former President of the Radio Manufacturers Association of the United States, who has been making a study of radio conditions in Europe, in reporting his survey of conditions abroad showed European broadcast programmes to be of excellent quality. England, he said, was still in the crystal-set stage because the high power used by their broadcasting statious made multiple-valve sets, such as are common in the Ninited States, untiecessary,