Radio for everybody; being a popular guide to practical radio-phone reception and transmission and to the dot-and-dash reception and transmission of the radio telegraph, for the layman who wants to apply radio for his pleasure and profit without going into the special theories and the intricacies of the art (1922)
Lescarboura, Austin C. (Austin Celestin), 1891- · New York, Scientific American publishing company [etc.] · leaf 318
uningmember, which is simply a mailing tube measuring 3^inches in diameter by 4 inches long, on which two wind-ings are carefully wound. The first winding consists oftwenty turns of No. 20 B. & S. gauge double cotton cov-ered wire, wound close together, of course, while the sec-ond winding,… … 300 RADIO FOR EVERYBODY in place simply by making holes in the cardboard tubeand passing the ends of the windings through these holes.Under no circumstances should the windings be varnished -40 TURNS
Radio
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