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 279
together. Another method ofcoupling circuits is shown in figure 19. An arrangementsuch as this is called an autotransf ormer. Other methodsof coupling are used in receiving circuits and will be dis-cussed later. It is to be noted that each type of transformer shownabove contains a variable factor.… … with very little force upon the other circuit, the couplingis said to be loose. All degrees of coupling between closeand loose are possible. The following example will illustrate more fully howvarious degrees of coupling are possible. Suppose it wasdesired to swing an occupied hammock. This could…
Radio
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