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Then, by delicately manipulating the variable condensers and inductances of his sensitive shunting relay circuits, he slowly shifted that frightful rod of energy from frequency to frequency, staring into the brilliant blankness of his micrometer screen as he did so. After a few minutes of search the screen darkened somewhat, revealing the image of the Jovian globe.
There was machinery in view, but no shafts or gears or power-leads. He guessed it to be machinery because it could not be anything else. He saw a dented case of metal, with an opened top. The boys had apparently dragged it into the relatively undamaged part of the ship to work upon its contents. He could see coils of bare metal, and arrangements which might have been inductances.
Tuning coils, sometimes called transmitting inductances and oscillation transformers, are of various types. The simplest kind is a transmitting inductance which consists of 25 or 30 turns of copper wire wound on an insulating tube or frame.
Tuning coils, sometimes called transmitting inductances and oscillation transformers, are of various types. The simplest kind is a transmitting inductance which consists of 25 or 30 turns of copper wire wound on an insulating tube or frame.
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