Show an easily made coil cheap and efficient quite often in his experimenting a radio fan needs ft coll coil that Is easily made cheap and efficient the materials needed for this coll coil are an ardt nary drinking glas some no 24 D S C wire a roll of tape four rahne faline stock clips and a piece of 0 thin wood such as may be obtained from a cigar box the wood should he cot to 1 hy by 46 inches and then placed across tho th middle of lie he open end of the tumbler tum double a piece of the tape and wrap it I 1 PL 0 WOOD roe CLASS JAR coll coil wound on tumbler will creati reduce losses tightly across tile the glass and over tile the wood then double another piece piece of tape and place it over th glass and wood so that it divides then into four equal parts bend the culpi in the middle and round them a litolf so that they will fit against the curva of the glass slip the ends of the clip under the tape and to thear end rolden the wire the coil can then be mount ed by means of holes drilled in th tb wooden base if the lie wire Is tightly around the glass and tap there will be no danger of its slip slipping pini off on and the coll coil will be found to bt b an elli clent one news |