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James A. Van Allen lab journal, March 1958-September 1959
Page 77
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Number of turns = (4/(5 x (10 exponent -5))) ~ (10 exponent 5) turns for [packing?] factor of 1.00 (and no insulation) (A) (2 pi) (r) (p) weight of Copper = (4) (2 pi) (5) (9) = 1130 gm. ~ 2.5 lbs ! Looks reasonable ! Length of wire ~ (10 pi)(10 exponent 5) = 3 x (10 exponent 6) cm = 30 km. R=100,000 ohms ! -------------------------------- L ~ (0.01257)(5)((10 exponent 5) exponent 2) ((2.3 [log sub 11? log sub 10? log sub 1gamma?])(((16)(5))/2) - 1.75) ~ (6.3 x (10 exponent 8))[1.93] = 1.2 x (10 exponent 9) μh L ~ 1200 [henries?] --------------------------------------
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Number of turns = (4/(5 x (10 exponent -5))) ~ (10 exponent 5) turns for [packing?] factor of 1.00 (and no insulation) (A) (2 pi) (r) (p) weight of Copper = (4) (2 pi) (5) (9) = 1130 gm. ~ 2.5 lbs ! Looks reasonable ! Length of wire ~ (10 pi)(10 exponent 5) = 3 x (10 exponent 6) cm = 30 km. R=100,000 ohms ! -------------------------------- L ~ (0.01257)(5)((10 exponent 5) exponent 2) ((2.3 [log sub 11? log sub 10? log sub 1gamma?])(((16)(5))/2) - 1.75) ~ (6.3 x (10 exponent 8))[1.93] = 1.2 x (10 exponent 9) μh L ~ 1200 [henries?] --------------------------------------
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