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#purposedfutured - 14 - Siobhán Henry interviews John Putt

Huffduffed by dajbelshaw on June 16th, 2011

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Huff-Duff: – noun; The common pronounciation of the acronym HF/DF meaning high frequency direction finder.; A triangulation method that uses two or more radio receivers to find the bearings of a radio transmitter.

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