Ogden Standard-Examiner | 1922-05-28 | Page 22 | Counterpoise Allows Sharper Tuning of Set

COUNTERPOISE ALLOWS SHARPER TUNING OF SET This Arrangement Used m Place of Ground for Wireless . By II L DUN( w. Director, Radio institute or imerlca. Tho counterpoise or artificial s-i..un.l is a useful addition to a radio receiving station and is simple In lu construction. Won't try' to use it with a crystal receiver unless near the transmitting station. But with d vacuum tube detector and amplifying set. the counterpoise lends harpn.s- inning and greatly eliminates Interference, although it cuts down the strength of the Incoming Incom-ing signals a little. I In using a counterpoise, no ground I connection is made to the receiving I set the counterpoise antenna taklnn 1 Its place. On aircraft and in places where the ground nas poor conductivity, .thu counterpoise antenna must be used Thl.s is merely another antenna supported sup-ported above the earth and lnsulatd from it. The station apparatus Is connected to the regular antenna m l earth. I M )N IKi I Wi s On an airplane the counterpoise Is furnished by the metal wires of the framework the engine, and metalizcd wings. The antenna may consist of a long wire which trails behind tho plane when In flight often below the counterpoise Rut the action Is not different from the ordinary antenna and counterpoise systems. Where an outdoor antenna is used in the country- the counterpoise should best bC located directly unde-r the aerial. It should be strung on small w oo.i.-n posts arranged so that I the wire does noi touch the ground. The wire should be or the same , kind as that used In the aerial. BACH CASE IMi mi i To determine the amount of wire and length of the counterpoise, each i ' operator will have to experiment with ; his ow n problem, inasmuch as it all depends upon the size, length and number of aires n the aerial. Bo csure to keep the lead-in v.. from the .aerial and the counterpoise well apart to do away with lot t caused by induction In the city where the aerial Is j placed on top of an apartment house. ( ! It will probably be impossible to erect ! I a counterpoise. If at all possible, however, every .'transmitting station should use thlsj I counterpoise, for it increases radla-. I tion and transmitting distance.