Principles of Radiotelegraphy

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1919 Excerpt: ...is measured in mils, the formula reduces to R = 9.68 X 10-5 RodVf. This formula applies only when the frequency is very high. That is, 9.68 X 10bd/f must be larger than unity, of the order 10 or more. Example The direct-current resistance of a certain length of No. 20 copper wire is 10 ohms. What is the alternating ...

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