Practical wireless telegraphy; a complete text book for students of radio communication (1917)
Bucher, Elmer Eustice, 1885- · New York, Wireless Press, Inc · leaf 122
layers. Possiblepunctures from this sourcemay be obviated by meansof choking coils of rela-tively high self inductanceconnected between thetransformer and the con-denser as shown at N andN2, Fig. 130. These coilsconsist of a few turns of finewire wound in the form ofa spiral, or in a single layeron… … 112 PRACTICAL WIRELESS TELEGRAPHY. greatly impede the radio-frequency oscillations. Hence the secondary winding is protectedfrom injury. 108. High Voltage Transformers.—The construction of the open andclosed core types of transformers of the Marconi Company is shown in Figs. 131and 132. The primary…
Telegraph, Wireless
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