Abstract
THE description given by E. T. Burton1 of his measurements of audio frequency interference is of great interest, and would be more so if quantitative values of the interference levels had been given. The similarity between the natural interference experienced on an untuned aerial and a cable is to be expected, but details of the depth and armouring of the cable would be valuable to estimate approximately the attenuation of the higher frequencies. Mr. Burton does not state whether a local earth was used, or a sea earth contiguous to the main cable; nor the length of the latter, if used.
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References
E. T. Burton : NATURE, 126, p. 55; July 12, 1930.
K. W. Wagner : Elektrische Nachrichten-Technik, 6, p. 125; April 1929. H. C. Channon : Jour. I.E.E., 67, p. 500; April 1929. See also Jour. Am. I.E.E., 48, p. 635; August 1929.
N. W. McLachlan : Electrician, 103, p. 704; Dec. 6, 1929.
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MEYERS, A. Submarine Cable Interference. Nature 126, 169 (1930). https://doi.org/10.1038/126169b0
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DOI: https://doi.org/10.1038/126169b0
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