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Show An Easily Made Coil, Cheap and Efficient i Quite often In his experimenting a 1 radio fan needs a coil that is easily I made, cheap and efficient. The mate- rials needed for this coll are an ordinary ordi-nary drinking glass, some No. 24 D. S. C. wire, a roll of tape, four Fahne-stock Fahne-stock clips and a piece of thin wood, such as may be obtained from a cigar box. The wood should be cut to l'i oy 44 inches and then placed across the middle of the open end of the tumbler. Double a piece of the tape and wrap 1' TAPE. r 1 Coll Wound on Tumbler Will Greatl) Reduce Losses. tightly across the glass and obliquelj over the wood. Then double anothei j piece' of tape and place It over the i glass and wood, so that It divides thou j into four equal parts. F.end the clip! i in the middle and round them a little so that they will fit against the curvi of the glass. Slip the ends of the clip; under the tape and to their end soUh-i the wire. The coil can then he mount ed by means of holes drilled In tlx wooden base. If the wire Is wrapper tightly around the glass and tape there will be no danger of Its slipping off, and the coll will be found to b - an efficient one. Iladio News. |