LOOPS OF LARGE DIMENSIONS.

Radio Record, Volume I, Issue 41, 27 April 1928, Page 13

LOOPS OF LARGE DIMENSIONS.

READER of a London wireless journal gives an account of experiments which he has made with large loop aerials formed around the walls of a room, and some of the results he has obtained are really surprising. As a matter of fact, in view of the difficulty of erecting a good ontdoor aerial, as well as the objection which many people seem to have to an outdoor aerial in any case, it has always seemed to me that a guod deal more attention might, with profit, be devoted to the loop acrial. The reader in question sets up two loops on two adjacent walls of the room, that is, two walls meeting at a corner. ‘hese loops are made by means of a few turns (usually not more than half a dozen) along the floor, up the wall, along the ccilings of picture rail and down the wall again. They are further arranged so that they may be put electrically in series. When recciving a station, first one loop is tried, then the other, and then the two in series. It may be that one or the other gives the best results, according to the bearing of the desired station, or it may be that the two together give a resultant directional effect better than that obtained with eithcr separately, JT‘urthermore, the loops are arranged so that they may be reversed electrically. In these and various ways it is evident that, althongh the loops are actually fixed, it is possible so to manipulate them efectrically that practically the same result is obtained as if they were mechanically movable, Although there is a good deal in all this that is well known, it seems to point the way to intetesting and useful developments,