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 335
ntensity of high-frequency cur- 308 RADIOTELEPHONY rent in the antenna. This changes the amplitude of theoscillations as the amplitude varies with the intensity ofcurrent in the oscillation. Figure 48-A shows this simplearrangement where T is a microphone transmitter. Speech in the mouthpiece of… … 30O Volts. 200 vo/+f} 7T Oscillations with200 Volts on P/afe ^- Oscillation? with300 Volts on Plate or a part of the inductance in the circuit. By this methodnot only is the resistance varied but the antenna has itsnatural period of oscillation varied by the action of themicrophone. This change in…
Radio
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