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Broadcasting station KZY, located in Oakland, California, was licensed to the Atlantic-Pacific Radio Supplies Company from December 9, 1921 until its deletion on January 24, 1923. It, and the Preston D. Allen station, KZM, were the first broadcasting stations licensed to Oakland.〔"New Stations", ''Radio Service Bulletin'', January 3, 1922, page 2.〕 KZY was the successor to Experimental station 6XC, which dated to mid-1920, and which founder Lee De Forest suggested deserved credit as the "first radio-telephone station devoted solely" to broadcasting to the public.〔"'Broadcasting' News by Radiotelephone" (letter from Lee de Forest), ''Electrical World'', April 23, 1921, page 936.〕 Including its predecessor, KZY's broadcasting history predated that of many better known pioneer stations, including WWJ in Detroit, Michigan (started August, 1920, originally as 8MK) and KDKA in Pittsburgh, Pennsylvania (debuted November 2, 1920 as 8ZZ). ==6XC (California Theater station)== Radio station 6XC〔The "6" in 6XC's callsign indicated that the station was located in the 6th Radio Inspection District, while the "X" signified it held an Experimental license.〕 was established by radio inventor Lee DeForest following his March, 1920 move from New York City to San Francisco. In late 1919, DeForest had restarted an experimental radio station, 2XG (also known as "The Highbridge station"), at his laboratory in New York City, in order to promote the DeForest Radio Telephone and Telegraph company and showcase developments in vacuum-tube technology. Beginning in November, 1919, that station had featured a nightly broadcast of news and entertainment. However, in early 1920 DeForest moved 2XG's transmitter from the Bronx to Manhattan without first getting permission from the government, and due to this infraction the local District Radio Inspector ordered him to suspend the station's operations.〔''Father of Radio: The Autobiography of Lee de Forest'', 1950, pages 349-351.〕 DeForest's response was to ship 2XG's 500-watt transmitter from New York to San Francisco, where it was used to start a new station, also operating under an Experimental license, now with the callsign 6XC. Ellery W. Stone made arrangements for the station to be located at the California Theater,〔(Ellery W. Stone: An Interview Conducted by Frank A. Polkinghorn, April 24, 1974 ), IEEE History Center.〕 thus 6XC was commonly referred to as "The California Theater Station". It began operating in April, and was initially licensed to Lee de Forest, Inc.〔"Special Land Stations", ''Radio Service Bulletin'', October 1, 1920, page 5.〕 The new station's broadcasts would be even more varied than what had been offered in New York, and DeForest personally oversaw the station's construction. The transmitter was located in the flies of the theater, with an antenna strung from the theater roof to the adjoining Humboldt Bank Building. Daily matinee concerts given at the theater by Herman Heller's orchestra were the main source of programming.〔DeForest, pages 354-356.〕 The station also featured professional singers, including Mary White〔"The California Theatre Radiophone" by Lieut. Ellery W. Stone, ''Pacific Radio News'', June, 1921, page 368.〕 and Frieda Hempel,〔"Hempel Heard in Honolulu", ''Musical Monitor'', June, 1921, page 441.〕 plus lectures by prominent speakers including Ellery Stone〔"The First Lecture by Radiophone", ''Pacific Radio News'', August, 1921, pages 4, 8.〕 and American Radio Relay League president Hiram Percy Maxim.〔"Talking to a Nation by Wireless", ''Journal of Electricity'', September 1, 1920, page 219.〕 Another special program had Robert Newton Lynch, Vice President and General Manager of the San Francisco Chamber of Commerce, sending greetings to the Japanese Armament Conference delegation as it approached the city aboard the ''Korea Maru''.〔"Japan's Envoys to Limitation of Armament Conference Welcomed", ''San Francisco Business'', October 21, 1921, page 6.〕 An estimated 1,500 concerts were broadcast by the end of 1921. In mid-1921 control of 6XC was transferred to the Atlantic-Pacific Radio Supplies Company,〔"Alterations and Corrections: Special Land Stations", ''Radio Service Bulletin'', September 1, 1921, page 7.〕 which was the local DeForest company representative. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「KZY」の詳細全文を読む スポンサード リンク
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