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KZY

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74:(also known as "The Highbridge station"), at his laboratory in New York City, in order to promote the DeForest Radio Telephone and Telegraph company and showcase developments in vacuum-tube technology. Beginning in November 1919, that station had featured a nightly broadcast of news and entertainment. However, in early 1920 de Forest moved 2XG's transmitter from the Bronx to Manhattan without first getting permission from the government, and due to this infraction the local District Radio Inspector ordered him to suspend the station's operations. 126: 94:. Acoustics were a challenge, because the orchestra needed to be heard by both the auditorium audience and radio listeners. Because of this restriction, the normal radio studio practice of deadening echoes by the use of wall coverings was unavailable. The solution for radio pickup was to suspend a large horn 40 feet (12 meters) above the orchestra, with the horn located above the quieter string instruments and away from the louder drums and basses. 62: 165:
to be moved from his home. There were plans to move KZY back to San Francisco with the new location said to be the Atlantic-Pacific headquarters at 646 Mission Street. However, it does not appear that KZY ever broadcast from the new location, and later that year the station was reported to have permanently ceased operations, although it was not formally deleted until January 24, 1923.
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Although KZY was well-managed, the station would be short-lived, and gave its last known broadcast the evening of June 17, 1922. At the time it was stated that this was only a temporary suspension, necessitated because Henry M. Shaw had resigned as Atlantic-Pacific's president and the station needed
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Although initially there were no formal standards for U.S. radio stations that provided entertainment broadcasts, effective December 1, 1921 the Department of Commerce adopted a regulation requiring that stations engaged in broadcasting to the public now needed to hold a Limited Commercial license.
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After a rush to move the facility to the new site, KZY's official opening took place on Christmas morning, December 25, 1921, with a live concert of Christmas-themed music. 6XC had operated on its own longwave frequency, but the new regulations required that all broadcasting stations use a shared
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entertainment wavelength of 360 meters (833 kilohertz). Under the initial timesharing agreement, KZY's schedule was 3:30-4:30 p.m. and 7:00–7:30 p.m. daily (except Sundays), plus 3:00–4:00 p.m. on Sundays, 2:30–3:15 p.m. on Wednesdays, and 8:15–9:00 p.m. on Saturdays.
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In mid-1921 control of 6XC was transferred to the Atlantic-Pacific Radio Supplies Company, which was the local DeForest company representative. In September, the station's primary schedule consisted of daily (except Sunday) concerts from 4:00-4:30 p.m., 7:15-7:45 p.m. and
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Therefore, a new license, with the randomly assigned call sign of KZY, was issued for the station on December 8, 1921. At the same time, it was decided to transfer the station to the home of Henry M. Shaw, the Atlantic-Pacific Radio Supplies president, located in the
109:. Another special program had Robert Newton Lynch, Vice President and General Manager of the San Francisco Chamber of Commerce, sending greetings to the Japanese Armament Conference delegation as it approached the city aboard the 44:
suggested deserved credit as the "first radio-telephone station devoted solely" to broadcasting to the public. Including its predecessor, KZY's broadcasting history predated that of many better-known pioneer stations, including
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made arrangements for the station to be located at the California Theater, thus 6XC was commonly referred to as "The California Theater Station". It began operating in April, and was initially licensed to Lee de Forest, Inc.
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De Forest's response was to ship 2XG's 500-watt transmitter from New York to San Francisco, where it was used to start a new station, also operating under an Experimental license, now with the call sign 6XC.
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9:00-9:45 p.m., plus Sunday at 10:00-12:00 noon, in addition to daily (except Sunday) "press" from 7:45-8:00 p.m. The station transmitted on a longwave wavelength of 1,250 meters (240 kHz).
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Radio station 6XC was established by radio inventor Lee de Forest following his March 1920 move from New York City to San Francisco. In late 1919, de Forest had restarted an experimental radio station,
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The new station's broadcasts would be even more varied than what had been offered in New York, and de Forest personally oversaw the station's construction. The transmitter was located in the
263:, October 1, 1920, page 5: The "6" in 6XC's call sign indicated that the station was located in the 6th Radio Inspection District, while the "X" signified it held an Experimental license. 97:
Daily matinee concerts given at the theater by Herman Heller's orchestra were the main source of programming. The station also featured professional singers, including Mary White and
1948: 33:, that was licensed to the Atlantic-Pacific Radio Supplies Company from December 9, 1921, until its deletion on January 24, 1923. It, and the Preston D. Allen station, 1943: 1938: 1991: 149:
Due to its more remote location, the station attracted fewer prominent artists than it had in San Francisco, although it did feature the radio debut of
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KZY was the successor to Experimental station 6XC, which dated to mid-1920, and which founder
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Ellery W. Stone: An Interview Conducted by Frank A. Polkinghorn, April 24, 1974
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of the theater, with an antenna strung from the theater roof to the adjoining
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in Detroit, Michigan (started August 1920, originally as 8MK), and
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For the radio station in Bemidji, Minnesota, branded as "KZY", see
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in Pittsburgh, Pennsylvania (debuted November 2, 1920 as 8ZZ).
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Father of Radio: The Autobiography of Lee de Forest
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Mary White with Lee de Forest, broadcasting at 6XC.
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Stone, 204:, April 23, 1921, page 936. 103:American Radio Relay League 10: 2038: 483:"Close Rock Ridge Station" 387:"Can You Hear Rock Ridge?" 377:, September 1921, page 49. 317:, August 1920, pages 4, 8. 295:"Hempel Heard in Honolulu" 188:, January 3, 1922, page 2. 18: 1847: 1780: 1297: 1147: 1112: 1045: 962: 753: 634: 605: 502:, June 17, 1922, page 20. 473:, June 17, 1922, page 20. 460:, March 25, 1922, page 1. 276:, June 18, 1922, page F7. 1972:station with notability. 527:"Answers to Questions", 121:KZY (Rock Ridge station) 518:, July 1, 1922, page 9. 489:, August 1922, page 33. 393:, June 1922, back page. 274:San Francisco Chronicle 1963:Clear-channel stations 1854:San Francisco Bay Area 1852:Radio stations in the 545:Radio Service Bulletin 516:Radio Service Bulletin 407:Radio Service Bulletin 360:Radio Service Bulletin 344:San Francisco Business 331:Journal of Electricity 301:, June 1921, page 441. 261:Radio Service Bulletin 235:, 1950, pages 349-351. 223:, June 1921, page 368. 186:Radio Service Bulletin 130: 92:Humboldt Bank Building 66: 458:Riverside Daily Press 128: 64: 1917:Yuba City-Marysville 1878:Other nearby regions 428:by Ellery W. Stone, 140:Oakland, California 31:Oakland, California 1114:NOAA Weather Radio 584:Radio stations in 375:Pacific Radio News 315:Pacific Radio News 221:Pacific Radio News 155:David Starr Jordan 131: 67: 1979: 1978: 1108: 1107: 107:Hiram Percy Maxim 2029: 1882:Fort Bragg/Ukiah 960: 959: 578: 571: 564: 555: 554: 548: 538: 532: 525: 519: 509: 503: 496: 490: 480: 474: 467: 461: 451: 445: 439: 433: 423: 414: 400: 394: 384: 378: 369: 363: 353: 347: 340: 334: 324: 318: 308: 302: 292: 286: 283: 277: 270: 264: 254: 248: 242: 236: 230: 224: 214: 205: 202:Electrical World 195: 189: 179: 2037: 2036: 2032: 2031: 2030: 2028: 2027: 2026: 1982: 1981: 1980: 1975: 1955: 1875: 1843: 1776: 1293: 1151: 1143: 1116: 1104: 1041: 958: 749: 630: 601: 582: 552: 551: 539: 535: 529:Oakland Tribune 526: 522: 510: 506: 500:Oakland Tribune 497: 493: 481: 477: 471:Oakland Tribune 468: 464: 452: 448: 440: 436: 424: 417: 401: 397: 385: 381: 370: 366: 354: 350: 341: 337: 325: 321: 309: 305: 299:Musical Monitor 293: 289: 284: 280: 271: 267: 255: 251: 243: 239: 231: 227: 215: 208: 196: 192: 180: 176: 171: 151:Glenhall Taylor 123: 80:Ellery W. 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437: 429: 406: 398: 390: 382: 374: 367: 359: 351: 343: 338: 330: 322: 314: 306: 298: 290: 281: 273: 268: 260: 252: 240: 232: 228: 220: 201: 193: 185: 177: 163: 148: 144: 132: 115: 110: 96: 85: 76: 68: 39: 26: 25: 1944:TV stations 1810:(shortwave) 1047:Translators 138:section of 1986:Categories 1949:Newspapers 1907:Sacramento 1869:Santa Rosa 598:California 592:, and the 169:References 136:Rock Ridge 111:Korea Maru 105:president 1300:call sign 1117:frequency 626:San Mateo 621:Palo Alto 590:Peninsula 1923:See also 1912:Stockton 1864:San Jose 611:Berkeley 594:East Bay 1970:Part 15 1897:Modesto 1814:KQWA-LP 1781:Defunct 1757:KXSF-LP 1722:KSFP-LP 1680:KQED-FM 1675:KQEB-LP 1670:KQEA-LP 1650:KPEA-LP 1601:KNBR-FM 1532:KJTZ-LP 1500:KHMV-LP 1490:KGPC-LP 1480:KGMZ-FM 1475:KFRC-FM 1465:KEXU-LP 1450:KEPT-LP 1378:KBLX-FM 1358:KACR-LP 1289:107.7-2 1284:107.7-1 1279:107.3-3 1274:107.3-2 1269:107.3-1 1264:106.9-1 1259:106.1-1 1254:105.3-1 1249:103.7-2 1244:103.7-1 1239:102.9-3 1234:102.9-2 1229:102.9-1 1224:102.1-1 1219:101.3-2 1214:101.3-1 1035:KXSF-LP 1030:KSFP-LP 1015:KQEB-LP 1010:KQEA-LP 1005:KGPC-LP 1000:KEPT-LP 990:KPEA-LP 985:KJTZ-LP 980:KEXU-LP 975:KACR-LP 616:Oakland 1892:Merced 1887:Fresno 1353:K285FA 1348:K281BU 1343:K277CH 1338:K269FB 1333:K265CV 1328:K249DJ 1323:K237GZ 1318:K229DD 1313:K205BM 1308:K201BV 1209:99.7-2 1204:99.7-1 1199:98.1-1 1194:97.3-2 1189:97.3-1 1184:96.5-3 1179:96.5-2 1174:96.5-1 1169:94.9-1 1164:93.3-1 1159:88.5-1 1139:162.55 1129:162.45 1026:102.5 588:, the 1958:Notes 1772:WWF64 1495:KHB49 1440:KEC49 1430:KDX54 1134:162.5 1124:162.4 1100:104.9 1095:104.1 1090:103.3 1085:101.7 1080:100.9 1022:100.9 996:96.9 971:96.1 954:107.7 949:107.3 944:106.9 939:106.1 934:105.3 929:104.5 924:103.7 919:102.9 914:102.1 909:101.7 904:101.3 803:89.5 778:89.3 487:Radio 430:Radio 391:Radio 88:flies 1824:KUSF 1819:KSAN 1808:KGEI 1798:KFRC 1788:KABN 1767:KZDG 1762:KYLD 1752:KVTO 1747:KVHS 1742:KTRB 1737:KTCT 1732:KSOL 1727:KSMC 1717:KSFO 1712:KSFN 1707:KSFB 1695:KSAN 1690:KRZZ 1685:KRBQ 1665:KPOO 1660:KPFB 1655:KPFA 1645:KPDO 1633:KOSF 1616:KOIT 1611:KOHL 1606:KNEW 1596:KNBR 1591:KMVS 1579:KMVQ 1574:KMKY 1569:KMEL 1564:KLVS 1552:KLLC 1547:KKSF 1542:KKIQ 1537:KKDV 1527:KITS 1522:KISQ 1517:KIQI 1505:KIOI 1470:KFAX 1460:KEXC 1455:KEST 1445:KECG 1435:KEAR 1425:KDOW 1420:KDIA 1415:KDFC 1410:KCSM 1405:KCRH 1400:KCEA 1395:KCBS 1373:KATD 1368:KALX 1363:KALW 1075:97.7 1070:95.3 1065:93.7 1060:88.9 1055:88.1 964:LPFM 899:99.7 894:98.9 889:98.1 884:97.3 879:96.5 874:95.7 869:94.9 864:94.1 859:93.3 854:92.7 849:92.1 844:91.7 839:91.1 834:90.7 829:90.5 824:90.3 819:89.9 812:KSMC 807:KPOO 797:KPFB 792:KPDO 787:KOHL 782:KMVS 774:89.1 769:88.5 764:88.1 745:1710 740:1640 735:1550 730:1510 725:1450 720:1400 715:1310 710:1260 705:1220 700:1100 695:1050 690:1010 51:KDKA 21:KKZY 1968:2. 1961:1. 1839:KZY 1834:KZM 1829:KYY 1803:KGB 1793:KDN 1700:HD2 1638:HD2 1626:HD3 1621:HD2 1584:HD2 1557:HD2 1510:HD2 1485:KGO 1388:HD3 1383:HD2 1298:By 754:By 685:990 680:960 675:910 670:860 665:810 660:740 655:680 650:610 645:560 635:By 411:KQL 159:WGY 72:2XG 47:WWJ 35:KZM 27:KZY 1988:: 543:, 514:, 485:, 456:, 418:^ 405:, 358:, 329:, 313:, 297:, 259:, 209:^ 184:, 600:) 596:( 577:e 570:t 563:v 23:.

Index

KKZY
Oakland, California
KZM
Lee de Forest
WWJ
KDKA

2XG
Ellery W. Stone
flies
Humboldt Bank Building
Frieda Hempel
American Radio Relay League
Hiram Percy Maxim

Rock Ridge
Oakland, California
Glenhall Taylor
David Starr Jordan
WGY
"New Stations: Commercial Land Stations"
"'Broadcasting' News by Radiotelephone"


"The California Theatre Radiophone"
Ellery W. Stone: An Interview Conducted by Frank A. Polkinghorn, April 24, 1974
"New Stations: Special Land Stations"
"Hempel Heard in Honolulu"
"The First Lecture by Radiophone"
"Talking to a Nation by Wireless"

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