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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 319

An illustration from 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, leaf 319
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 … FIBRE SHELL How the fixed winding: of the variometeris made. A frame work is built up withsheet fiber on a square form, and heldtogether Avith shellac or glue. The wind-ing is placed on this form, as shown. or shellacked, as this introduces certain undesirable char-acteristics. Both windings are…

Radio

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More pictures from 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

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