Broadcasters’ news bulletin (June-Dec 1931)

Record Details:

Title:
Broadcasters’ news bulletin
Date:
June-Dec 1931
Publisher:
Washington, D.C. : The National Association of Broadcasters
Volume:
Broadcasters’ news bulletin (June-Dec 1931)
Leaf #:
000543
Language:
English
Subjects:
NAB reports, Radio broadcasting -- United States – Periodicals","Radio -- Law and legislation -- United States -- Periodicals","National Association of Broadcasters -- Periodicals","National Association of Broadcasters
Collection:
Broadcasting & Recorded Sound
Format:
Periodicals
Contributor:
University of Maryland College Park
Sponsor:
University of Maryland College Park
Coordinator:
Media History Digital Library
Date Added:
September 14, 2023
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Soptcmbor 26, 1931 2 Frequency Difference PO'l i:r 50 100 : 250 500 1 IP' : 2. 5 K 5 Kv; : :5 KL 10 K" 25 IP’.’ 5 0 KT’’ Local : Regional : Hig h PoTrer Reg; Clc ar ( 0 1950 1950 (10 400 403 419 426 434 448 460 504 582 677 757 5 IP (20 147 150 166 173 181 195 207 222 257 292 317 (30 72 73 84 91 99 113 125 151 175 198 213 67 (3) (40 69 70 74 77 80 87 96 122 144 169 169 Clear ( 0 — « (10 444 447 463 470 478 492 504 530 60S 705 783 5 IP: (20 162 165 181 188 196 210 222 248 283 318 343 (30 98 99 106 112 119 134 151 158 180 205 225 93 ( 4) (40 95 96 100 103 106 113 122 126 148 173 193 ( 0 (10 522 525 541 548 556 570 582 608 630 725 805 U o t — 1 ‘ (20 197 200 216 223 231 245 257 283 305 340 365 (30 120 121 128 134 141 156 175 180 192 217 237 115 ( 4) (40 117 118 122 125 128 135 144 148 154 179 199 ( 0 (10 617 620 636 643 651 665 677 703 725 750 830 25 :o' (20 232 235 251 258 265 280 292 318 340 365 390 I / ] (30 145 146 153 159 166 181 193 205 217 232 252 140 ^ 4 > (40 142 143 147 150 153 160 169 173 . 179 186 206 ( 0 (10 697 700 716 723 731 745 757 783 805 830 850 50 IP' (20 257 260 281 288 291 305 317 343 365 390 410 (30 165 166 173 179 186 201 218 225 237 252 260 160 (40 162 . 163 167 170 173 180 189 193 199 206 210 * These separations are c alculated to minimize objectionable intorfercnco in the good s orvicG areas of stations about 90 per cent of the time approximately as follows: (1) 50 '!! . tc 100 Local Channel, 2 millivolts, 7 to 10 miles (2) 250 to 1000 ’■'. Rogional Channel, 1 millivolt, 26 to 40 miles (3) 5 IC:' to 10 lO" High Pouer Regional, 1 millivolt, 65 to 80 miles (4) 5 K".; to 50 IC ■ Clear Channel, 0.5 millivolt, 93 to 160 miles. \