Abstract
WE welcome this volume, which gives full practical details of the “Telef unken” or quenched-spark system of radiotelegraphy. (We use this word, fpr we think it will shortly receive international sanction.) Practically all the treatises, on this subject published in English concern themselves mainly with the Marconi system, and discuss very briefly, if at all, the quenched-spark system. In 1906 Max Wien showed that it was possible to quench the oscillations in the primary circuit of the sending station, after a few oscillations, leaving the bulk of the electromagnetic energy to be expended in, and radiated from, the antenna circuit alone. Hence the efficiency and the amount of energy radiated are practically doubled. The system is the standard one in Germany, and the author thinks that possibly national prejudice has prevented us from judging its merits fairly.
Wireless Telegraphy: With Special Reference to the Quenched-Spark System.
By B. Leggett. (The Directly-Useful Technical Series.) Pp. xv + 485. (London: Chapman and Hall, Ltd., 1921.) 30s. net.
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Wireless Telegraphy: With Special Reference to the Quenched-Spark System . Nature 107, 390–391 (1921). https://doi.org/10.1038/107390b0
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DOI: https://doi.org/10.1038/107390b0
