. 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 . the v a r i o -coupler and the compact coilarrangement. It consists of alarge tube on which are woundmany turns of wire, which isthe primary and is connected with the antenna and theground, and a smaller tube, which slides in and out of thelarge tube and is wound with many turns of wire
. 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 . the v a r i o -coupler and the compact coilarrangement. It consists of alarge tube on which are woundmany turns of wire, which isthe primary and is connected with the antenna and theground, and a smaller tube, which slides in and out of thelarge tube and is wound with many turns of wire. Somemeans, such as a slider or a multi-point switch, is generallyemployed to vary the numberof active turns in both the pri-mary and secondary of the loosecoupler. In keeping with modern prac-tice, which has done away withsliding arrangements in favorof rotary adjustments, the vario-coupler has become the stand-ard device for coupling theprimary and secondary circuitsof a receiving^ set. The vario- t 1 J. u J vt, Vario-coupler, which has coupler has a tube wound with taken the place of the old many turns of wire, forming *yp« loose-coupier. the primary or antenna-ground circuit, and a woodenball or composition frame, which is mounted on a rotableshaft and is also wound with many turns of wire to form. RADIO FOR EVERYBODY 131 FT
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Keywords: ., bookcentury1900, bookdecade1920, bookidradioforever, bookyear1922
