The NSS Bulletin - ISSN 1090-6924
Volume 49 Number 1: 1-9 - June 1987

A publication of the National Speleological Society

A New Radio Location Device
Anne and Andrew Bell


The article describes a radio location device of a rather different design to those previously decribed in the literature. Its essential features are a sensitive receiver with a very narrow bandwidth and a tranmitter of very simpe design which is therefore comparatively cheap to build. The circuitry is described in some detail, as is the construction of the oop antennas used with the devise. Finally some details are given of locations carried out with the device. Originating in Wales, this radio location equipment has become known as the "Ogof Beacon."

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