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 68
slight a fluctuating current, and it will con-trol or modulate or modify a far more powerful current;thus we have the weak current moulding a powerful cur-rent, and it is this feature which gives us the amplifier.It is this characteristic, too, that makes the vacuum tuhethe finest telephonic relay… … The farmer, using an inexpensive radio receiving set, can now keep in touch with the outside Avorld. He hears the latest musical hits, and he receives weather forecasts, crop reports, and other information of real A^alue. of the vacuum tube, and there serve to control a freshand far more powerful…
Radio
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