Knowledge

File:KDKA-KDPM-WBZ Shortwave relay diagram (1923).jpg

Source 📝

38: 238: 209: 86: 498: 468: 140:
In 1923, the Westinghouse Electric & Manufacturing Co. operated shortwave links to provide for the retransmission of the programming from broadcasting station KDKA in East Pittsburgh, Pennsylvania over its broadcasting stations KDPM in Cleveland, Ohio and WBZ in East Springfield,
243:
Public domain works must be out of copyright in both the United States and in the source country of the work in order to be hosted on the Commons. If the work is not a U.S. work, the file
52: 48: 42: 65: 97: 539: 497: 492: 557: 230: 345: 399: 329: 467: 462: 365: 312: 56: 37: 508: 478: 248: 105: 534: 226: 222: 217: 92: 164:, as part of the article "Broadcast Relay on 100 Meters" by Howard Allen Duncan. 266: 150: 272://commons.wikimedia.org/File:KDKA-KDPM-WBZ_Shortwave_relay_diagram_(1923).jpg 529: 435:
Click on a date/time to view the file as it appeared at that time.
160:
Illustration included on page 674 of the November 1923 issue of
203: 80: 251:
indicating the copyright status in the source country.
124: 104:
Commons is a freely licensed media file repository.
70:(700 × 605 pixels, file size: 168 KB, MIME type: 130:KDKA-KDPM-WBZ Shortwave relay diagram (1923).jpg 85: 8: 540:Shortwave broadcasting in the United States 437: 292: 183: 550:The following other wikis use this file: 172:Uncredited magazine article illustration 527: 413: 397: 379: 363: 343: 327: 310: 307: 288: 281: 525:The following 3 pages use this file: 208: 7: 515:User created page with UploadWizard 426: 301: 295: 242: 214: 134: 117: 63: 300: 286: 236: 207: 84: 31: 21: 283: 135: 14: 282: 26: 1: 260:be used for sound recordings. 308:Items portrayed in this file 576: 554:Usage on ja.wikipedia.org 206: 427: 233:) before January 1, 1929. 16: 285: 229:(or registered with the 91:This is a file from the 514: 484: 296:Shortwave relay diagram 168: 156: 149: 146: 127: 95:. Information from its 493:01:49, 31 January 2019 98:description page there 41:Size of this preview: 463:11:23, 1 October 2020 231:U.S. Copyright Office 162:Science and Invention 269:in the United States 215:This work is in the 485:Better quality scan 247:have an additional 47:Other resolutions: 546:Global file usage 518: 294: 280: 279: 276: 202: 201: 176: 175: 113: 112: 93:Wikimedia Commons 32:Global file usage 567: 535:KDPM (Cleveland) 505: 475: 330:copyright status 274: 273: 270: 264: 256:This tag should 241: 240: 239: 211: 210: 204: 198: 195: 192: 189: 184: 152: 139: 131: 125: 109: 88: 87: 81: 75: 73: 60: 57:700 × 605 pixels 53:555 × 480 pixels 49:278 × 240 pixels 43:694 × 600 pixels 575: 574: 570: 569: 568: 566: 565: 564: 544: 519: 511: 510:Thomas H. White 503: 481: 480:Thomas H. White 473: 429: 428: 425: 424: 423: 422: 421: 420: 419: 418: 416: 406: 405: 404: 402: 391: 390: 389: 388: 387: 386: 385: 384: 382: 381:1 November 1923 372: 371: 370: 368: 357: 356: 355: 354: 353: 352: 351: 350: 348: 336: 335: 334: 332: 321: 320: 319: 318: 317: 315: 299: 298: 297: 275: 271: 265: 262: 261: 237: 234: 225:because it was 196: 193: 190: 187: 182: 177: 151:1 November 1923 142: 129: 122: 115: 114: 103: 102: 101:is shown below. 77: 71: 69: 62: 61: 46: 12: 11: 5: 573: 571: 563: 562: 561: 560: 548: 547: 543: 542: 537: 532: 523: 522: 517: 516: 513: 509: 506: 500: 495: 490: 487: 486: 483: 479: 476: 470: 465: 460: 456: 455: 452: 449: 446: 443: 440: 433: 432: 417: 414: 412: 411: 410: 409: 408: 407: 403: 398: 396: 395: 394: 393: 392: 383: 380: 378: 377: 376: 375: 374: 373: 369: 364: 362: 361: 360: 359: 358: 349: 344: 342: 341: 340: 339: 338: 337: 333: 328: 326: 325: 324: 323: 322: 316: 311: 309: 306: 305: 304: 303: 302: 291: 290: 287: 284: 278: 277: 212: 200: 199: 181: 178: 174: 173: 170: 166: 165: 158: 154: 153: 148: 144: 143: 141:Massachusetts. 132: 123: 121: 118: 116: 111: 110: 89: 79: 78: 40: 36: 35: 34: 29: 24: 19: 13: 10: 9: 6: 4: 3: 2: 572: 559: 556: 555: 553: 552: 551: 545: 541: 538: 536: 533: 531: 528: 526: 520: 512: 507: 501: 499: 496: 494: 491: 489: 488: 482: 477: 471: 469: 466: 464: 461: 458: 457: 453: 450: 447: 444: 441: 439: 438: 436: 430: 401: 367: 347: 346:public domain 331: 314: 268: 267:Public domain 259: 255: 252: 250: 249:copyright tag 246: 235: 232: 228: 224: 223:United States 220: 219: 218:public domain 213: 205: 191:Public domain 188:Public domain 186: 185: 179: 171: 167: 163: 159: 155: 145: 138: 133: 126: 119: 107: 100: 99: 94: 90: 83: 82: 76: 67: 66:Original file 58: 54: 50: 44: 39: 33: 30: 28: 25: 23: 20: 18: 15: 549: 524: 434: 431:File history 257: 253: 244: 216: 161: 136: 106:You can help 96: 64: 22:File history 128:Description 558:フランク・コンラッド 521:File usage 502:909 × 976 472:700 × 605 448:Dimensions 415:image/jpeg 400:media type 72:image/jpeg 27:File usage 530:KDKA (AM) 445:Thumbnail 442:Date/Time 366:inception 227:published 180:Licensing 137:English: 504:(360 KB) 474:(168 KB) 289:Captions 459:current 454:Comment 313:depicts 293:English 263:PD-1923 221:in the 120:Summary 68:‎ 169:Author 157:Source 254:Note: 197:false 194:false 451:User 245:must 147:Date 17:File 258:not 55:| 51:| 45:. 108:. 74:) 59:.

Index

File
File history
File usage
Global file usage
File:KDKA-KDPM-WBZ Shortwave relay diagram (1923).jpg
694 × 600 pixels
278 × 240 pixels
555 × 480 pixels
700 × 605 pixels
Original file
Wikimedia Commons
description page there
You can help
public domain
United States
published
U.S. Copyright Office
copyright tag
Public domain
depicts
copyright status
public domain
inception
media type
11:23, 1 October 2020
Thumbnail for version as of 11:23, 1 October 2020
Thomas H. White
01:49, 31 January 2019
Thumbnail for version as of 01:49, 31 January 2019
Thomas H. White

Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.