The Radio Amateur's Handbook. 48th Edition. Newington, Conn.: The American Radio Relay League, 1971.
Founded by William J. Halligan in 1932, the company was huge at one time, and enjoyed its greatest success from 1945 to 1963. In 1966, company ownership passed to the Northrop Corporation, but competition from Japanese imports led to the company's demise in 1975.
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