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 325
R, of the oscillation trans-former. (3) Builds up a potential in coil, S, so that the gridend of the coil and the grid itself become negative, which 297 298 RADIOTELEPHONY (4) Decreases the current in circuit B-R-F-P-B. Thedecreasing of the current through coil, E, (5) Builds up a potential in… … The oscillations are generated as long as the key isclosed. It is to be noted that the oscillations have energyfrom the battery, B, added. Hence, they are undampedoscillations. The circuit containing the antenna deter-mines the frequency of the oscillations. The couplingbetween R and S must be…
Radio
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