Show Service of Loop Aerial in Securing Selectivity The greatest objection to o the use ot of a loop aerial In securing maximum selectivity Is the loss of ot volume When Is la experienced from the in- in interference In Interference of two or more stations near the same wave length or when the static becomes so hen heavy as a to drown out even the locals the trouble may be reduced at ut least 7 75 per cent by closing the gro ground nd switch twitch thus I grounding the lie aerial and connecting I the set to a 3 or foot 4 loop of 10 or 12 1 I turns shunted hunted by u It variable conden conden- condenser condenser ser the loop to be placed as near as possible to the wire connecting the tho aerial to the ground Using an ordinary three circuit three tuner and a WD 11 tube a correspondent dent writes I regularly receive e 1000 miles through static that would make reception Impossible other otherwise Ise and andal al also o out cut code Interference entirely The fhe method Is equally efficient with a two-circuit two set tile the tb only requisite being that the loop be benot benot benot not more than lien 2 or 3 feet from the th ground round wire Ire A plaster pluster wall separating ing Ins them seems to make no difference how however r Radio Digest |