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Bureau of Standards

jUN 2 5 1926

QC100
DEPARTMENT OF COMMERCE

BUREAU OF STANDARDS

George K. Burgess, Director

KILOCYCLE-METEF

There is increasing tendency in radio practice to use radio fre quencies in kilocycles rather than wave lengths in meters. "Kilo' means a thousand, and "cycle" means one complete alternation

The number of kilocycles (abbreviated kc) indicates the number o thousands of times that the rapidly alternating current in the antenn,

repeats its flow in either direction in one second. The smaller th wave length in meters, the larger is the frequency in kilocycles. Thi

numerical relation between the two is given by the following rule

For approximate calculation, to obtain kilocycles divide 300,000 b; the number of meters, and to obtain meters divide 300,000 by th

number of kilocycles. For example, 100 meters equals approximatel;

3,000 kilocycles, 300 m equals 1,000 kc, 1,000 m equals 300 kc, 3,001

m equals 100 kc. For highly accurate conversion the factor 299,82(

is used instead of 300,000. This rule is based on the fact that wav<

KILOCYCLES (kc) TO METERS (m), OR METERS TO KILOCYCLES

[ COLUMNS ARE INTERCHANGEABLE J

kcorm m orkc pr m m orkc

-

"' '" m or kc kr " r morke kcorm morkc kc or m morke L, nr n, —- morkc : m or e cor m or c cor m^ m or

10 29 982 1 010 296 9 2 010 149 2 3 010 99 61 4 010 74, 77 5 010 59 84 6 010 49 89 7 010 42. 77 8. 010 37. 43 0, 010 33. 2( 20 It, 991 l! 020 203. 9 2! 020 148! 4 3! 020 99. 28 4! 020 74 58 5! 020 SO 73 6, 020 40. 80 7! 020 42! 71 8! 020 37! 38 9, 020 33! 24 30 9, 994 1. 030 291. 1 2. 030 147. 7 3. 030 98. 95 4. 030 74 40 5, 030 59. 61 6. 030 40. 72 7. 030 42. 65 8. 030 37. 34 9, 030 33. 20

288. 3 74 ni

42. 59 8. 040 37. 29 9. 040 33. 17 sn K 99ft 1 050 285. 5 2 050 146 3 ' OR in 4' nsn 5 nsn so 17 ft nen 49 56 7 05J 42. 53 8, 050 37. 24 9, 050 33. 13

60 4 997 1 060 282. 8 2 060 145 5 3 060 97 08 4 060 73 85 5 060 59 25 6 060 40 48 7. 060 42. 47 8. 060 37. 20 9, 060 33. 09 70 4, 283 l! 070 2 80! 2 2! 070 144! 8 3. 070 97. 66 4! 070 73! 67 5! 070 59. 13 6! 070 49. 30 7! 070 42. 41 8. 070 37. 15 9, 070 33. 06

80 3, 748 1. 080 277. 6 2. 080 144 1 3, 080 97. 34 4. 080 73. 49 5. 080 59. 02 6. 080 49. 31 7. 080 42. 35 8. 080 37. 11 9, 080 33. 02

3 331 275. 1 42. 29 8, 090 37. 06 9, 090 32. 9i 100 2 998 l' 100 272. 6 2! 100 142. 8 3. 100 Oft 7? \ ?nn

' 71' M 5 100 58 79 r! 100 49. 15 7' 100 42. 23 8. 100 37. 01 9, 100 32. 9i

110 2. 726 1,110 270. 1 2. 110 142. 1 3 110 96 41 4 110 72 95 5 110 58. 67 6, 1 10 49. 07 7. 110 42. 17 8. 110 36. 97 9, 110 32. 91 120 2. 499 l! 120 267. 7 2,' 120 141 4 3! 120 96. 10 4! 120 72! 77 5! 120 58! 56 6! 120 48. 99 7! 120 42. 11 8. 120 36. 92 9. 120 32. 88

130 2, 306 1. 130 265. 3 2, 130 140. 8 3. 130 95. 79 4. 130 72. 60 5. 130 58. 44 6. 130 48. 91 7. 130 42. 05 8, 130 36. 88 9, 130 32. 84

140 2, 142 1. 140 263, 2 140 140. 1 3. 140 7 140 41. 99 8. 140 36. 83 9, 140 32. 80

ISO 1, 999 1, 150 260. 7 2! 150 139. 5 3, 150 95. 18 4. 150 72. 25 5 150 58. 22 6 150 48. 75 7. 150 41. 93 8! 150 36. 79 0, 150 32. 77

160 1. 874 1. 160 258. 5 2, 160 138. 8 3, 160 94. 88 4 160 72. 07 5 160 58. 10 6 160 48. 67 7, 160 41. 87 8, 160 36. 74 9, 160 32. 73 170 1, 764 1, 170 256. 3 2, 170 133. 1 3! 170 94. 58 4! 170 71. 90 5! 170 57. 99 6! 170 48. 59 7! 170 41. 82 8, 170 36. 70 9, 170 32. 70

ISO 1, 666 1, 180 254. 1 2, 180 137. S 3, 180 94. 28 4. 180 71. 73 5, 180 57. 88 6. 180 48. 51 7, 180 41. 76 8, 180 36. 65 9, 180 32. 66

190 1, 578 1, 190 252. 2, 190 136. 9 3. 190 93. 99 71. 56 5 190 57. 77 6 100 48. 44 7, 190 41. 70 8. 190 36. 61 9, 190 32. 62 200 1, 499 1, 200 249. 9 2, 200 136. 3 3, 200 93. 69 4' 200 71. 39 5* 200 57. 66 6, 200 48. 36 7. 200 41. 64 8. 200 36. 56 9, 200 32. 59

210 1, 428 1, 210 247. 8 2, 210 135. 7 3, 210 93. 40 4 210 71. 22 5, 210 57. 55 6, 210 48. 28 7, 210 41. 58 8, 210 36. 52 9, 210 32. 55 220 1, 363 1, 220 245. 8 2. 220 135. 1 3, 220 93! 11 4! 220 7l! 05 5! 220 57! 44 6! 220 48! 20 7,' 220 41. 53 8. 220 36. 47 9, 220 32. 52 230 1, 304 1, 230 243. 8 2. 230 134. 4 3, 230 92. 82 4, 230 70. 88 5, 230 57. 33 6. 230 48. 13 7, 230 41. 47 8, 230 36. 43 0, 230 32. 48

240 1, 249 1, 240 241. 8 2, 240 133. 8 3, 240 92. 54 4 240 70. 71 5. 240 57. 22 6, 240 48. 05 7. 240 41. 41 8. 240 36. 39 0, 240 32. 45

250 1, 199 1, 250 239. 9 2, 250 133. 3 3. 250 92. 25 4 250 70. 55 5! 250 57. 1

6 250 47. 97 7, 250 41. 35 8. 250 36. 34 9, 250 32. 41

260 1, 153 1. 260 238. 2, 260 132. 7 3, 260 91. 97 4 260 70. 38 5, 260 57. 00 6 260 47. 89 7, 260 41. 30 8. 260 36. 30 9, 260 32. 38

270 1. 110 1, 270 236. 1 2, 270 132 1 3, 270 9l! 69 4! 270 70. 22 5! 270 56. 89 6, 270 47! 82 7! 270 41. 24 8! 270 36. 25 9, 270 32.' 34

280 1. 071 1, 280 234. 2 2, 280 131. 5 3, 280 91. 41 4, 280 70. 05 5, 280 56. 78 6. 280 47. 74 7, 280 41. 18 8, 280 36. 21 9, 280 32. 31 290 1. 034 1, 290 232. 4 2, 290 130. 9 3, 200 91. 13 4 290 69. 89 5, 290 56. 68 6 290 47. 67 7 290 41. 13 8, 290 36. 17 0. 200 32. 27 300 999. 4 1, 300 230. 6 2, 300 130. 4 3, 300 00. 86 4, 300 69. 73 5! 300 56. 57 6 300 47. 59 7, 300 41. 07 8, 300 36. 12 9, 300 32. 24

310 967. 2 1, 310 228. 9 2, 310 129. 8 3, 310 00. 58 4, 310 69. 56 5, 310 56. 46 6 310 47. 52 7 310 41. 02 8, 310 36. 08 9, 310 32. 20 320 936. 9 1. 320 227. 1 2, 320 129. 2 3, 320 90. 31 4! 320 69. 40 5, 320 56. 36 6! 320 47! 44 7! 320 40. 96 8, 320 36. 04 9, 320 32! 17 330 908. 6 1, 330 225. 4 2, 330 128. 7 3, 330 90. 04 4, 330 69. 24 5, 330 56. 25 6. 330 47. 36 7, 330 40. 90 8, 330 35. 99 0, 330 32. 14 340 881. 8 1, 340 223. 7 2, 340 128. 1 3, 340 89. 77 4, 340 69. 08 5, 340 56. 15 6, 340 47. 29 7, 340 40. 85 8, 340 35. 95 9, 340 32. 10 350 8S6. 6 1. 350 222. 1 2, 350 127. 6 3, 350 89. 50 4, 350 68. 92 5, 350 56. 04 6, 350 47. 22 7, 350 40. 79 8, 350 35. 91 9, 350 32. 07

360 832. 8 1, 360 220. 4 2, 360 127. 3, 360 89. 23 4, 360 68. 77 5, 360 55. 94 6, 360 47. 14 7, 360 40. 74 8, 360 35. 86 0, 360 32. 03 370 810. 3 1. 370 218. 8 2, 370 126. 5 3, 370 88. 97 4, 370 68. 61 5, 370 55. 83 6, 370 47. 07 7, 370 40. 68 8, 370 35. 82 9, 370 32. 00 380 789. 1. 380 217. 3 2. 380 126. 3, 380 88. 70 4, 380 68. 45 5, 380 55. 73 6, 380 46. 99 7, 380 40. 63 8. 380 35. 78 9, 380 31 06 390 768. 8 1, 390 215. 7 2, 390 125. 4 3, 390 88. 44 4, 390 68. 30 5. 390 55. 63 6, 300 46. 02 7, 390 40. 57 8. 300 35. 74 9, 390 31. 93 400 749 6 1, 400 214. 2 2, 400 124. 9 3, 400 88. 18 4, 400 68. 14 5, 400 55. 52 6, 400 46. 85 7. 400 40. 52 8, 400 35. 69 9, 400 31. 90

410 1,410 212. 6

Tit . I' tin 1 u n 1' VS.

87. 92 4, 410 67. 99 5. 410 55. 42 6, 410 46. 77 7, 410 40. 46 8. 410 35. 65

15 ft|

9, 410 a 4?n31. 86

11 si

' 1, 3UU iyy. y 2 5UU 1 19. y 3, 500 85. 66 4, 500 66. 63 5, 500 54. 51 ft 500 1 46 13 7, 500 39. 98 8! 500 35. 27 9! 500 31. 56

510 587. 9 1, 510 198 6 2, 510 119. 5 3, 510 85. 42 4, 510 66. 48 5. 510 54. 41 6 510 46 06 7, 510 39. 92 8, 510 35 23 9, 510 31. 53 520 576! 6 1, 520 197. 2 2, 520 119. 3. 520 85. 18 4, 520 66. 33 5, 520 54. 32 6! 520 45. 98 7, 520 39. 87 8! 520 35. 19 9, 520 31. 49 530 565. 7 1, 530 196. 2, 530 118. 5 3, 530 34. 04 4, 530 66. 19 5. 530 54. 22 6, S30 45. 01 7, 530 39. 82 8. 530 35. 15 9, 530 31. 46

555. 2 1. 540 194. 7 2, 540 118. 3 540 84. 70 4, 540 66. 04 5. 540 54. 12 7, 540 30. 76 8 540 35. 1

9, 540 31. 43 550 545 1 1, 550 193. 4 2! 550 117. 6 3! 550 84. 46 4, 550 65. 89 5, 550 54. 02 ft ecrt

0, 5D0 45 77 7, 550 30. 71 8' 550 35. 07 9, 550 31. 39

560 535. 4 1. 560 192. 2 2, 560 117. 1 3, 560 84. 22 4, 560 65. 75 5. 560 53. 92 6 560 45 70 7. 560 30. 66 8 560 35. 03 9, 560 31. 36

570 526. 1, 570 191. 2! 570 116. 7 3! 570 83! 98 4. 570 65. 61 5, 570 53. 83 6! 570 45. 63 7. 570 39. 61 8! 570 34. 98 9, 570 31. 33 580 516. 9 1, 580 189. 8 2, 580 116. 2 3, 580 83. 75 4. 580 65. 46 5. 5S0 53. 73 6. 580 45. 57 7. 580 39. 55 8, 580 34. 94 9, 580 31. 30

1, 590 188. 6 2, 590 1 15. 8 3, 500 83. 52 4, 590 65. 32 5, 590 53. 64 7, 590 39. 50 8 500 34. 90 9, 590 31. 26

ftnn 400' 7 1, 600 187. 4 2 600 115. 3 3 600 83. 28 4, 600 65. 18 5, 600 53. 54 ft' ftnn 6, 600 45. 43 7, 600 39. 45 8 600 34. 86 9, 600 31. 23

610 491 5 1, 610 186. 2 2, 610 114. 9 3, 610 83. 05 4, 610 65. 04 5, 610 53. 44 6 610 45 36 7, 610 39. 40 8 610 34. 82 9, 610 31. 20 620 483! 6 1. 620 185. 1 2! 620 114 4 3! 620 82! 82 4. 620 64. 90 5, 620 53. 35 6, 620 4S. 29 7, 620 39. 35 8! 620 34! 78 9, 620 31. 17 630 475. 9 1. 630 183. 9 2, 630 114. 3, 630 82. 60 4, 630 64. 76 5, 630 53. 25 6, 630 45. 22 7, 630 39. 29 8, 630 34. 74 9, 630 31. 13

1, 640 182. 8 2 640 1 13. 6 3 640 82. 37 4. 640 64. 62 5, 640 53. 16 7. 640 39. 24 34. 70 9, 640 31. 10

fttn 650 1, 650 181. 7 2 650 113. 1 3* 650 82. 14 4, 650 64. 48 5. 650 53. 07 ft' ftsn 6, 650 45 no 7, 650 39. 19 8 650 34. 66 9 650 31. 07

660 454 3 1, 660 180. 6 2 660 1 12. 7 3 660 81 92 4, 660 64. 34 5, 660 52. 97 660 45 02 7, 660 39. 14 8 660 34. 62 9 660 31. 04 670 447! 5 1, 670 170. 5 2! 670 112! 3 3! 670 8l! 70 4, 670 64. 20 5. 670 52. 83 6! 670 44. 95 7. 670 39. 09 8! 670 34 58 9! 670 3l! 01 680 440. 9 1, 680 178. 5 2, 680 111. 9 3, 680 81. 47 4, 680 64. 06 5. 680 52. 79 6. 680 44. 88 7, 680 39. 04 8, 680 34. 54 9, 680 30. 97 690

l?fl *

1, 690 177. 4 1U5 4, 690 63. 93 5, 690 52. 69 2i 75

7, 690 38. 90 9 600 30. 04 700 1, 700 176. 4

2' 700 1110 3 700 81 03 4, 700 63. 79 5. 700 52. 60 ft' 7ftft 6, 700 44. 75 7, 700 38. 94 r' 7nn 1 34 46 9, 700 30. 01

710 422 3 1, 710 175. 3 2 710 110 6 3 710 80 81 4, 710 63. 66 5, 710 52. 51 710 44 68 7, 710 38. 89 8 710 34 42 9 710 30. 88 720 416. 4 1, 720 174. 3 2! 720 110. 2 3! 720 80! 60 4, 720 63. 52 5. 720 52. 42 6! 720 44. 62 7, 720 38. 84 8! 720 34! 38 9! 720 3o! 85 730 410. 7 1, 730 173. 3 2, 730 100. 8 3. 730 80. 38 4. 730 63. 39 5, 730 52. 32 6. 730 44. 55 7, 730 38. 79 8. 730 34. 34 9, 730 30. 81 740

tfto a

1, 740 172. 3 4, 740 63. 25 5, 740 52. 23 7. 740 38. 74 750 399. 8 1, 750 171. 3

2' 750 109 3 750 70 QC 4, 750 63. 12 5. 750 52. 14 ft' 7sn 6, 750 44, 42 7, 750 38. 60 r' 750 14 27 9 750 30. 75

760 394 5 1, 760 170. 4 2 760 108 6 3 760 79 74 4. 760 62. 99 5, 760 52. 05 6 760 44 35 7. 760 38. 64 8 760 34 23 9 760 30 72 770 389! 4 1, 770 169. 4 2! 770 108! 2 3! 770 79! 53 4, 770 62. 86 5. 770 51. 96 6, 770 44! 29 7. 770 38. 59 8! 770 34! 10 9! 770 30. 69 780 384. 4 1. 780 168. 4 2, 780 107. 8 3, 780 79. 32 4, 780 62. 72 5, 780 51. 87 6, 780 44. 22 7, 780 38. 54 8, 780 34. IS 9, 780 30. 66

790 379. 5 1, 790 167. 5 107 ? \ Ron

79 1

4, 790 62. 59 5. 790 51. 78 6. 790 44. 16 7, 790 38. 49

14

- II Q 790 30. 63 800 374. 8 1, 800 166. 6 ? flnn 78. 90 4, 800 62. 46 5, 800 51. 69 6, 800 44. 09 7, 800 38. 44 r' Rno 9, 800 30. 59

810 370. 2 1, 810 165. 6 2 810 106 7 3 810 78 69 4, 810 62. 33 5. 810 51. 60 6, 810 44 03 7, 810 38. 30 8 810 34 03 9 810 30 56 820 365. 6 1, 820 164. 7 2! 820 106 3 3! 820 78! 49 4. 820 62. 20 5. 820 51. 52 6, 820 43! 96 7. 820 38. 34 8! 820 33! 99 9! 820 30! 53 830 361. 2 1, 830 163. 8 2. 830 105. 9 3. 830 78. 28 4. 830 62. 07 5, 830 51. 43 6. 830 43. 90 7, 830 38. 29 8. 830 33. 95 9, 830 30. 50 840 356. 9 1, 840 162. 9 ?' atn \n\ ? \ ten

4, 840 61. 95 5, 840 51. 34 6, 840 43. 83 7. 840 38. 24 W RR 850 352. 7 1, 850 162. 1 2, 850 77 RR 4, 850 61. 82 5, 850 51. 25 6, 850 43. 77 7, 850 38. 19 r rso o' R50 10 it

860 348. 6 1, 860 161. 2 2 860 104 8 3 860 77 67 4, 860 61. 69 5, 860 51. 16 6, 860 43. 71 7, 860 38. 14 8 860 33 84 9 860 30 41 870 344. 6 1, 870 160. 3 2! 870 104 5 3! 870 77! 47 4, 870 61. 56 5. 870 51. 08 6, 870 43. 64 7. 870 38. 10 8! 870 33! 80 9, 870 30! 38 880 340. 7 1, 880 159. 5 2, 880 104. 1 3. 880 77. 27 4. 880 61. 44 5, 880 SO. 09 6. 880 43. 58 7, 880 38. 05 8. 880 33. 76 9, 880 30. 35 890 336. 9 1, 890 158. 6

ini I

4. 890 61. 31 5, 890 50. 90 6, 890 43. 52 7, 890 38. 00 W fto 900 333. 1 I, 900 157. 8 2, 900 7fi 76. RROS 4, 900 61. 19 5, 900 50. 82 6. 900 43. 45 7, 900 37. 95 r' onn 0' onn * in 2R

910 329. 5 1, 910 157. 2 910 103 3 010 76 68 4. 910 61. 06 5.910 50. 73 6, 910 43. 39 7, 910 37. 90 8 910 33 65 9 910 30 25 920 1, 920 156. 2 2! 920 102. 7 3! 920 76. 48 4, 920 60. 94 5. 920 50. 65 7. 920 37. 86 8! 920 33 61 o! 920 30 22 930 322! 4 1, 930 155 3 2! 930 102! 3 3! 930 76! 29 4, 930 60. 82 5, 930 50. 56 6! 930 43! 26 7. 930 37. 81 8, 930 33. 57 9, 930 30. 19 940 319. 1, 940 154. 5 2, 940 102. 3, 940 76. 10 4, 940 60. 69 5. 940 50. 47 6, 940 43. 20 7. 940 37. 76 8, 940 33. 54 9, 940 30. 16 950 315 6 1, 950 153. 8 2, 950 101. 6 3, 950 75. 90 4, 950 60. 57 5, 950 50. 39 6, 950 43. 14 7, 950 37. 71 8,950 33. 50 9,950 30. 13

960 312. 3 1, 960 153. 2, 960 101. 3 3, 960 75. 71 4, 960 60. 45 5. 960 50. 31 6. 960 43. 08 7. 960 37. 67 8, 960 33. 46 9,960 ! 30. 10 970 309. 1 1, 970 1S2. 2 2. 970 100. 9 3, 970 75. 52 4, 970 60. 33 5. 970 50. 22 6. 970 43. 02 7. 970 37. 62 8, 970 33. 42 9, 970 30. 07 980 303. 9 1, 980 151. 4 2. 980 100. 6 3, 980 75. 33 4. 980 60. 20 S. 980 50. 14 6, 980 42. 95 7. 980 37. 57 8, 980 33. 39 9, 980 30. 04

990 302. 8 1. 990 ISO. 7 2, 990 100. 3 3, 990 75 14 4. 990 60. 08 5, 990 50. 05 6, 990 42. 89 7, 090 37. 52 8. 990 33. 35 9, 990 30. 01

I. 000 299. 8 2, 000 140 9 3, 000 99. 94 4. 000 74. 96 5. 000 59. 96 6. 000 4». 97 7, 000 42. 83 8. 000 37. 48 9, 000 | 33. 31 10, 000 29. 98 (OVER)
DEPARTMENT OF COMMERCE

BUREAU OF STANDARDS

George K. Burgeaa, Director

KILOCYCLE-METEF

There is increasing tendency in radio practice to use radio fre quencies in kilocycles rather than wave lengths in meters. "Kilo' means a thousand, and "cycle" means one complete alternation The number of kilocycles (abbreviated kc) indicates the number o thousands of times that the rapidly alternating current in the antenni

repeats its flow in either direction in one second. The smaller thi wave length in meters, the larger is the frequency in kilocycles. Th' numerical relation between the two is given by the following rule For approximate calculation, to obtain kilocycles divide 300,000 b; the number of meters, and to obtain meters divide 300,000 by thi number of kilocycles. For example, 100 meters equals approximate!; 3,000 kilocycles, 300 m equals 1,000 kc, 1,000 m equals 300 kc, 3,001 m equals 100 kc. For highly accurate conversion the factor 299,821

is used instead of 300,000. This rule is based on the fact that wavi

MISCELLANEOUS PUBLICATION OF THE BUREAU OF STANDARDS

No. 67

(Issued October 9, 1925)

AVERSION TABLE

th is equal to velocity divided by frequency, and the velocity of

o waves in space, according to the best data available, is 299,820 neters per second.

lis table gives accurate values of kilocycles corresponding to any

iber of meters, and vice versa. The table is based on the factor

820, and gives values for every 10 kilocycles or meters. It should

articularly noticed that the table is entirely reversible ; that is, for

nple, 50 kilocycles is 5,996 meters, and also 50 meters is 5,996

:ycles. The range of the table is easily extended by shifting the mal point; the shift is in opposite directions for each pair of values;

;xample, one can not find 223 in the first column, but its equivalent

Dtained by finding later in the table that 2,230 kilocycles or meters

juivalent to 134.4 meters or kilocycles, from which 223 kilocycles

deters is equivalent to 1,344 meters or kilocycles.

MISCELLANEOUS PUBLICATION OF THE

BUREAU OF STANDARDS

No. 67

(Issued October 9, 1925)

Price per copy, 5 cents

MVERSION TABLE

th is equal to velocity divided by frequency, and the velocity of o waves in space, according to the best data available, is 299,820

meters per second.

tiis table gives accurate values of kilocycles corresponding to any

iber of meters, and vice versa. The table is based on the factor

820, and gives values for every 10 kilocycles or meters. It should

larticularly noticed that the table is entirely reversible ; that is, for nple, 50 kilocycles is 5,996 meters, and also 50 meters is 5,996

cycles. The range of the table is easily extended by shifting the

mal point; the shift is in opposite directions for each pair of values;

ixample, one can not find 223 in the first column, but its equivalent

Stained by finding later in the table that 2,230 kilocycles or meters

juivalent to 134.4 meters or kilocycles, from which 223 kilocycles

deters is equivalent to 1,344 meters or kilocycles.


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