. 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 . the re-ceiving station each circuit eliminates the energy of cer-tain wave lengths and the result is that only the energyof a very narrow band of wave lengths arrives at thedetector. The curves shown in figure 26, in addition to the curvesof previous figures, will give a more comprehensive viewof the whole subject of interf
. 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 . the re-ceiving station each circuit eliminates the energy of cer-tain wave lengths and the result is that only the energyof a very narrow band of wave lengths arrives at thedetector. The curves shown in figure 26, in addition to the curvesof previous figures, will give a more comprehensive viewof the whole subject of interference, resonance, and cou-pling. The three curves shown in figure 26-A show thevariation of the energy received at different wave lengthswith a variation in coupling. Thus the lengths of the linesah, a V, and ab represent the energy received at the wavelengths 1,120, 1,200, and 1,280, respectively, when the MIRACLE OF THE AGE 267 coupling is correct. The length of the lines ac, ac, andac represents the energy received at the same wavelength when the coupling is too close. The double humpcurve marked Coupling too close would be obtainedwith close coupling in any receiving set. Note that thereare two frequencies (wave lengths) that receive a large 6 Correct- Coupling. Coup//na too c/ssc Coupling too loose 1120 1200 1260 Wave Length FiaZGrb c
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Keywords: ., bookcentury1900, bookdecade1920, bookidradiomiracle, bookyear1922
