Radio, miracle of the 20th century ... a story of human achievement that stands unrivalled in the history of humanity, together with a colorful portrayal, giving a broad, general view of the whole subject of wireless telegraph and telephone and its marvelous development (1922)
Drinker, Frederick E. [from old catalog], Lewis, James G., [from old catalog] joint author · [Philadelphia, Printed by National publishing co.] · leaf 338
t in the primary induces a varying potential in thesecondary. This varying potential in the secondary isimpressed on the plate, thus varying the amplitude of theoscillations as has been explained. This arrangement isvery simple but has the disadvantage of being limited inthe amount of variation… … Figure 53 is a simplified diagram of a complete radio-telephone set. LFC are inductances of such values as tochoke out not only radio-frequency oscillations, but audio-frequency oscillations as well. They prevent the pass-age of audio-frequency oscillations or of audio-frequencyvariations in direct…
Radio
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