We think of radio navigation and direction finding as something fairly modern. However, it might surprise you that direction finding is nearly as old as radio itself. In 1888, Heinrich Hertz noted ...

Every two years, competitors from 25 different countries descend upon a forest, armed with the direction-finding tools of a bygone era. They wave large, pronged radio receivers — the kind you may find ...

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THE radio direction-finder is an instrument for determining the direction of arrival of electric waves of the frequencies normally used in radio communication. Although it was introduced during the ...