Abstract :
The principle of both the single-dipole and double-dipole compensated loop direction-finder is described and reference is made to several patents which embody applications of these principles. A brief account is given of the theoretical and practical work carried out at Slough on the single-dipole system. It is shown that this system can in certain circumstances be made to have a considerably higher pick-up factor for a given overall area than the Adcock direction-finder but that it is limited to use on ground of good conductivity. The double-dipole system, on the other hand, is independent of ground conductivity but has no superiority over the ¿H¿ type of Adcock system as regards pick-up factor.
