The effect of local conditions on radio direction-finding installations

This paper is an account of some of the experiments carried out during the past year by the Sub-Committee of the Radio Research Board on Wireless Direction Finding. The majority of the work was done either at the Radio Research Station, Slough, or the National Physical Laboratory, Teddington. The paper summarizes the work of previous investigators on the same lines, and indicates why further reasearch was necessary. It then describes experiments which provide quantitative data as regards the effect of metal work, coils, aerials, overhead wires and trees on a direction-finding set in their vicinity, and gives definite figures which show the extent in certain cases of errors produced by mountains and buildings.