RADIO PESTS.
DETECTING OSCILLATORS. (bi cable—PßES3 ASSOCIATION—COPYRIGHT.) (AUSTRALIAN AND N.Z. CABLE ASSOCIATION.) (Received January 18th, 7.20 p.m.) LONDON, January 17. The latest addition to twentieth century wonders is a van like an undersized "Black Maria" with a circular frame aerial on the roof. It is used as a Post Office sleuth in tracking down wireless oscillators. . A hand on an innocent-looking dial inside the van is able to point with unerring certainty to the actual house in which the mysterious and annoying oscillator resides, after which officers enter and gentle persuasion and expert guidance follow. It is a truly ingenious system. Bearings are taken on three sides of the area visited and plotted down on a large scale map. If the lines intersect each other, the location of the oscillator is known, and the van proceeds immediately in the indicated direction. As the house is approached the oscillation becomes gradually fainter, till the zero point is reached when the van gets immediately before the house.
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Press, Volume LXIII, Issue 18903, 19 January 1927, Page 11
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165RADIO PESTS. Press, Volume LXIII, Issue 18903, 19 January 1927, Page 11
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