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List of oldest radio stations

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It is generally recognised that the first radio transmission was made from a temporary station set up by Guglielmo Marconi in 1895. This followed on from pioneering work in the field by a number of people including Alessandro Volta, André-Marie Ampère, Georg Ohm and James Clerk Maxwell.[1]

The several potential contenders for the title of "oldest radio station" are listed below, organized by sign-on date. These are not restricted to radio broadcasting, i.e., the transmissions were not necessarily intended to reach a wide audience.

Stations

[edit]

AM on mediumwave and longwave

[edit]
Experimental and early radio stations (AM on mediumwave and longwave)
Station
call-sign
(original) 		Station
call-sign
(current) 		City/location On air Transmission frequency
(AM radio / FM radio) 		Broadcast class
Roberto Landell de Moura n/a São Paulo (between Paulista Avenue and Alto de Santana)[2] 1893
Guglielmo Marconi n/a Broadcast across his garden in Pontecchio, Italy.[1][3] 1895 Experimental
Although Australia's first officially recognised broadcast was made in 1906, some sources claim that there were transmissions in Australia in 1897, either conducted solely by Professor William Henry Bragg of the University of Adelaide[4][5] or by Prof. Bragg in conjunction with G.W. Selby of Melbourne.[1][List entry too long] n/a 1897 Experimental. Disputed in some sources.
Guglielmo Marconi, first trans-Atlantic transmission. n/a from Poldhu, Cornwall to Signal Hill, St. John's, Newfoundland.[1][3] December 1901 Experimental
(First official Morse Code transmission in Australia) n/a from Queenscliff, Victoria to Devonport, Tasmania 1906 Experimental
(Reginald Fessenden experimental alternator station) BO[6] Brant Rock, Massachusetts, United States 21 December 1906 (Audio tests from various locations from as early as 1900) AM 50 kHz (approximately) ? W
Lee de Forest (laboratory in the Parker Building) [?] New York City, New York, United States 1907 AM ? kHz (approximately) ? W
(Beloit College Professor Dr. Charles Aaron Culver) [WBCR, WBNB, WEBW] Beloit, Wisconsin, United States 1907[7] AM ? kHz (approximately) now airs on 90.3 FM. ? W
FN/SJN/6XF/6XE/KQW/"San Jose" KCBS San Jose, California/San Francisco, California 1909, 1921 (officially granted experimental license as KQW, become commercial in 1921, and KCBS in 1949) AM 740 kHz (Originally used 15 watts modulated with Carbon microphone) Class-B
XWA CINW Montreal, Quebec, Canada August 1914 – 1 December 1919 – May 1922 – 29 January 2010 AM 940 kHz (Not original frequency). Considered by many Canadians to be "First scheduled broadcast station;" prior call sign CFCF stood for Canada's First, Canada's Finest. Class-A (Clear channel); XWA Experimental and W/T School station licence starting end of 1914,[8] regular broadcasting test emissions starting 1 December 1919 with XWA being replaced in May 1922 by private commercial broadcasting licence CFCF;[9] AM station CINW ceased operations on 29 January 2010.
2YU WRUC Union College, Schenectady, New York 1915[10] Various Frequencies AM, switched in 1975 to 90.9 FM, & moved in 1983 to 89.7 FM Original: Technical & Training School License, Current: Class-A
2XI WGY Schenectady, New York 20 February 1922 AM 810 kHz Class-A
9ZP, 9CLS KGFX Pierre, South Dakota The station's roots date back to 1912 when Dana McNeil, was first licensed as 9ZP. In 1916, he was licensed as 9CLS. According to the FCC's card file for the station, the broadcast license for KGFX was first issued on 15 August 1927, with the licensee listed as Dana McNeil, The station was originally at 1180 kHz, moving to 580 kHz in 1928. In 1932, it moved to 630 kHz, where it remained until 1967.As of 2018 KGFX 1060AM continues to broadcast local content at 10 kW power in Pierre, SD. With an FM translator broadcasting at 107.1[List entry too long] Various frequencies,
2XG New York City 1916 Unknown Unknown
(see also Lee de Forest [above].)
8XK, 8ZZ KDKA Pittsburgh, Pennsylvania 1916 AM 1020 kHz 75 watts (1916), Class-A (1920–present). Began simulcasting on shortwave in 1923 as 8XS.
Irish rebel station none General Post Office, Sackville Street, Dublin, Ireland 24 April 1916 Morse code only (Despite this claimed[where?] by some[who?] to be "world's first broadcast" as transmission not aimed at specific target) converted ship transmitter
9XM WHA University of Wisconsin–Madison, Madison, Wisconsin 4 December 1916 (regular Morse code weather broadcasts; first voice broadcast in February 1919; regular programming January 1921) AM 970 kHz Class-B
First direct communication Australia to the United Kingdom n/a AWA; Ernest Fisk; Sydney 1918 AM 21 kHz [11]
7AC/7XC KJR Seattle, WA, USA 1919 AM 833 kHz/619 kHz, then various frequencies; currently AM 950 kHz & FM 102.9 MHz [12]
Rádio Clube de Pernambuco same name as well Recife, Pernambuco, 1919 AM 720 kHz Made the first radiophonic broadcast in Brazil, but the first radio officially acknowledged was Rádio Sociedade do Rio de Janeiro (actually, Rádio MEC). Also, it is one of the oldest stations in the world.[List entry too long]
First Australian experiment in the broadcast of music n/a AWA; Ernest Fisk; Sydney 8 August 1919 AM [11]
Doubleday-Hill radio department station[13][14] KQV[15] Pittsburgh, Pennsylvania 19 November 1919[13][14][16] Currently AM 1410 kHz Currently Class D
(Experimental Czech tests) Petřínská rozhledna (Petřín Lookout Tower), Prague, Czechoslovakia 28 October 1919 (Experimental),
20 May 1920 		AM ??? kHz ?? kW
2MT (Marconi experimental station with a regular news service) Writtle, Chelmsford, Essex, England 23 February 1920 AM 107 kHz 15 kW
LOR Radio Argentina LOR Buenos Aires, Argentina 27 August 1920

Continued daily commercial broadcast up to 1997

AM 857 kHz[17] 5 Watts initially, 500 Watts by 1921
6ADZ KNX Los Angeles, California Summer 1920, granted broadcasting station license 1921 AM 1070 kHz Class-A
8MK WWJ Detroit, Michigan 20 August 1920 AM 950 kHz Class-B
KDKA same as original. Pittsburgh, Pennsylvania 27 October 1920 (Aired as 8ZZ that night) AM 1020 kHz Class-A (Clear channel)
9AH Toronto, Canada 18 April 1921 (as 9AH); 18 April 1922 (as CKCE) - closed September 1924 450 metres Licensed to Canadian Independent Telephone Company of Toronto (CITCO), initially as experimental license for wireless telephony.[18]
9YK WEW St. Louis, Missouri 21 April 1921 (as 9YK); 23 March 1922 (as WEW) AM 770 kHz Class-D
WRR KTCK Dallas, Texas 4 August 1921 (broadcasts date back to 1920) AM 1310 kHz
WBZ Same as original. Boston, Massachusetts 19 September 1921 AM 1030 kHz Class-A (Clear channel)
XEH-AM Same as original. San Nicolás de los Garza, Nuevo León 9 October 1921 AM 1420 kHz Class-B
KYW same as original Chicago, Illinois (1921)[19]
Philadelphia, Pennsylvania (1934)[20]
Cleveland, Ohio (1956)
Philadelphia, Pennsylvania (1965)[21] 		11 November 1921 AM 560 kHz, 570 kHz, 1020 kHz (Chicago)
AM 1020 kHz (Philadelphia)
AM 1100 kHz (Cleveland))
AM 1060 kHz (Philadelphia) 		Class-A (Clear channel)
Experimental broadcasts by Professor Robert Jack[22] of Otago University 4XD Dunedin, New Zealand 17 November 1921 experimental New Zealand's first regular broadcasts of voice and music[23]
2CM   Charles Maclurcan; Sydney 1921 AM 214 kHz Australia's first experimental station[11]
Radio Journal de la Tour Eiffel
(Eiffel Tower Newsreel) 		France Inter Paris, France 1921 "Long wave"
115 kHz (2600 m) 		N/A
WCAT Rapid City, South Dakota 1922 AM 618 kHz (1922–?)
AM 1200 kHz 1928–1941
AM 1230 kHz 1941–1952
9-BC, 9-XR, 9-BY, WOC WOC Davenport, Iowa 1922 1420 kHz (1942–present) Class-B
WLB KUOM Saint Paul, Minnesota 13 January 1922 AM 770 kHz Class-D
WHN WEPN Ridgewood, New York February 1922,[24] some sources cite 18 March 1922 AM 833 kHz Class-A
KLZ same as original Denver, Colorado 10 March 1922[25] AM 560 kHZ www.KLZradio.com, Colorado's First Station, Class-B
WSB Same as original Atlanta, Georgia 15 March 1922[26] Originally on 360 meters (AM 833 kHz), moved across the dial and eventually assigned to AM 750 kHz following the NARBA treaties Class-A (Clear channel)
WIP WTEL Philadelphia, Pennsylvania 17 March 1922 AM 610 kHz Class-B
WLW WLW Cincinnati, Ohio 23 March 1922 AM 700 kHz Class-A (Clear channel)
WWL same as original New Orleans, Louisiana 31 March 1922 AM 870 kHz Class A
WGU WSCR Chicago, Illinois 13 April 1922 Originally AM 833 kHz, became WMAQ at 750 kHz on 2 October 1922, moved to 670 kHz on 2 July 1923 Class-A
KHJ KHJ Los Angeles, California 13 April 1922 AM 720 kHz, founded by C.R. Kierulff & Co., sold to Times-Mirror Company in late 1922 Class-A
KFI KFI Los Angeles, California 16 April 1922 AM 640 kHz, founded by Earle C. Anthony Class-A
4XD WBT Charlotte, North Carolina 18 December 1920, License granted 10 April 1922 AM 1110 kHz Class-A
CKOC CKOC Hamilton, Ontario 1 May 1922 410 metres (1922–1925)

AM 880 kHz (1925–1930)
AM 1120 kHz (1930–1931)
AM 630 kHz (1931–1933)
AM 1120 kHz (1933–1941)
AM 1150 kHz (1941—present)

Class B
KZN KSL Salt Lake City, Utah and vicinity 6 May 1922 AM 1160 kHz(1941–present) Class A (Clear channel)
2LO 2LO London, United Kingdom 11 May 1922 1 hour daily tests on 350 metres (857 kHz) AM. Full service opened: 14 November 1922
2ZY 2ZY Manchester, United Kingdom 17 May 1922 Test TXs: 350 metres (857 kHz) AM. Full service opened 15 November 1922: 375 meters
CFCA none Toronto, Canada 22 June 1922 — 1 September 1933 Began testing on 450 metres on 10 April 1922, licensed for 400 metres beginning 22 June 2022. Moved to 770 kHz in 1928.
KFBL KRKO Everett, Washington, USA 26 August 1922[27] AM 1380  kHz (1958–present) Class B (Regional)
CKAC same as original Montreal, Quebec/Montreal, Québec, Canada 12 September 1922 AM 730 kHz Class-A
DN 4XD Dunedin, New Zealand 4 October 1922 originally AM 1431 kHz, now AM 1305 kHz and FM 99.8 MHz
9BT CFRC-FM Kingston, Ontario, Canada 7 October 1922 450 metres (666 kHz) (ca.1923–1925),
AM 1120 kHz (1925–1930),
AM 930 kHz (1930–1933),
AM 915 kHz (c. 1933),
AM 1510 kHz (1933–1941),
AM 1490 kHz (1941–1990)
concurrently FM 91.9 MHz (1954–1990)
(now FM 101.9 MHz) 		Class-A
5IT 5IT Birmingham, United Kingdom 15 November 1922 Not known
WNAX same as original Yankton, South Dakota 25 November 1922 AM 570 kHz
WKAQ same as original San Juan, Puerto Rico 3 December 1922 AM 580 kHz Class-B
Radio Ceylon Sri Lanka Broadcasting Corporation Colombo, Sri Lanka 1923 (experimental), 1925 (official launch) – present "Long wave" 375 kHz 1500 W[28]
WKBV
William Knox BrookVille 		Same as is Richmond, Indiana
Whitewater Broadcasting 		1923 AM 1000 kHz 24/7 Class B
Radio Chilena (Chile Radio Company) CB66 Santiago, Chile October 1922 (experimental), 26 March 1923 (official launch) – 2005 AM 660 kHz
PKX (Malabar Radio) n/a Bandung, Dutch East Indies (now Indonesia) 5 May 1923 Long wave
Radiojournal Český rozhlas Radiožurnál Prague-Kbely, Czechoslovakia 18 May 1923 "Long wave"
292 kHz (1025 m)[verification needed] 		[29][30]
CYB "El Buen Tono" XEB-AM (Instituto Mexicano de la Radio) Mexico City, Mexico 23 September 1923[31] AM 1220 kHz N/A
Finland's first private public broadcasting station. 3NB 3NB, Tampere Tampere, Tavastia 1 November 1923 AM kHz [32]
Australia's first official station. 2SB; 2BL as from 1 March 1924 ABC Radio Sydney Sydney 23 November 1923. One of six Sealed Set system stations; AM 855 kHz [33][34]
XRO n/a Shanghai, China November 1923 AM 1500 kHz 50 Watts (1923). First radio station in China.[35]
2FC 2RN, Radio National Sydney 12 December 1923. One of six Sealed Set system stations; AM 273 kHz [33][34]
Radio Ibérica N/A Madrid, Spain 22 December 1923.; AM 729 kHz N/A
19 September 1924 Radio Belgrade Belgrade, Serbia 19 September 1924.; AM 684 kHz N/A
3AR 3RN, Radio National Melbourne, Victoria, Australia 26 January 1924. One of six Sealed Set system stations; AM 625 kHz [36][34]
WES WLS Chicago, Illinois Owned by Sears Roebuck, WLS would come to stand for the World's Largest Store. Sears ran broadcasts from WMAQ studios as WBBX in March 1924. WES tests were conducted 9 to 11 April 1924. WLS would begin on 12 April and became one of 25 original 50,000 watt "Clear Channel" system stations; Originally AM 870 kHz, AM 890 kHz Class-A
6WF 720 ABC Perth Perth, Western Australia 4 June 1924. One of six Sealed Set system stations; AM 240 kHz [37][34]
N/A Radio Bloemendaal Bloemendaal, Netherlands
15 June 1924 originally AM 1500 kHz (200m)
later AM 1223 kHz (245 m)
currently AM 1116 kHz (269 m) 		various
VOWR/8WMC 800 AM St. John's, Newfoundland and Labrador, Canada 24 July 1924 800 AM VOWR - Wikipedia
URI (Unione Radiofonica Italiana), 1-RO Rai Radio 1 Rome, Italy
6 October 1924 AM 705 (425m)  kHz
KFUO Same as original St. Louis, Missouri 14 December 1924 AM 850 kHz Class-B
KOA same as original Denver, Colorado, United States
15 December 1924 One of 25 original 50,000 watt "Clear Channel" system stations AM850 kHz
Statsradiofonien DR P1 Copenhagen, Denmark 1 April 1925 (experimental), license granted April 1926, Regular broadcast from April 1926 "Long wave" N/A
WCSH WZAN Portland, Maine 1925 "Long wave"
N/A Radio Poland Warsaw, Poland 1 February 1925 (experimental), Regular broadcast from 18 April 1926 "Medium wave" N/A
N/A Radio Romania Bucharest, Romania Summer 1925 – 1927 (experimental), license granted March 1928, Regular broadcast from 1 November 1928 "Long wave" N/A
2BE. Australia's first commercial station. Burgin Electric Company. n/a Sydney 7 November 1924 to 6 November 1929 AM 870 kHz. (Wavelength later taken by 2GB.)[38] B Class, commercial[34]
WEBK WOOD Grand Rapids, Michigan, United States 16 September 1924 AM 1130 kHz, presently on 1300 kHz, Class-B
3LO 774 ABC Melbourne Melbourne, Victoria, Australia 13 October 1924. One of six Sealed Set system stations; AM 175 kHz [36][34]
5MA n/a Adelaide, South Australia April 1924 to early 1925. One of six Sealed Set system stations. Does not appear to have actually broadcast see Arthur William Jarrett
2UE. Australia's third commercial station, and the oldest commercial station still operating. 2UE Sydney 26 January 1925 AM 1025 kHz B Class, commercial.[34] Was originally going to broadcast as 2EU, but the callsign was reversed prior to the licence being issued on 7 November 1924.
JOAK same as is Tokyo, Japan 22 March 1925 AM 594 kHz
Bataviase Radio Vereniging RRI Jakarta stations (part of RRI) Batavia, Dutch East Indies (now Jakarta, Indonesia) 16 June 1925
CHRC CHRC Quebec City, Quebec/Quebec City, Quebec, Canada 1 April 1926 AM 800 kHz Class-B. Final broadcast in 2012.
Lietuvos Radijas LRT Radijas Kaunas, Lithuania 26 June 1926 AM 1961 kHz
XOH, later COHB n/a Harbin, China 1 October 1926 AM 1071 kHz 100 Watts, 1928 1 kW. First radio station founded by Chinese.[39]
CFCO same as is Chatham, Ontario/Chatham-Kent, Ontario, Canada September 1927 AM 630 kHz Class-B
JODK HLKA Seoul, South Korea 1927 AM 711 kHz
GOW, ZBW RTHK Hong Kong 30 June 1928 (GOW, now RTHK 3)
1XE became WGI February 1922 (and WARC March 1925) Medford, Massachusetts 1916 sporadically, then 1919–1920 till April 1925 ? – later on 833 kHz
2XN City College of New York, New York City 1913; 1920
2ZK New Rochelle, New York 1916
NSF/HDO, later ANDO and AVRO NPO Huizen (transmitter), Hilversum (studio), Netherlands 21 July 1923, from 1930 part of Dutch Public Radio AM 279 kHz, 1927 also 1004 kHz, today FM network 500 W, 1927 5 kW
2RN (Irish Free State radio) RTÉ (Irish national radio & television)[40] General Post Office (O'Connell Street), Dublin, Ireland 1 January 1926 AM 380 kHz, and from Cork AM612 kHz,
NDO, 50% time KRO, 50% NCRV NPO Huizen (transmitter), Hilversum (studio), Netherlands 1927, from 1930 part of Dutch Public radio AM 160 kHz,1935 transmitter moved to Kootwijk, 1938 also Jaarsveld 722 kHz, today FM network and 747/1251 kHz Huizen 15 kW, Kootwijk day 15 kW, evening 120 kW, Jaarsveld 20 kW
2TM 2TM Tamworth, Australia 27 February 1935 1287 kHz

FM or shortwave

[edit]
Experimental or early radio stations (FM and shortwave)
Station
call-sign
(original) 		Station
call-sign
(current) 		City/location On air Transmission frequency
(AM radio / FM radio) 		Broadcast class
PCGG N/A The Hague, Netherlands 6 November 1919 – 11 November 1924 Narrow-band FM, 570 m N/A
WWV US Government Time Service WWV Fort Collins, Colorado "6 months before KDKA" (May 1920) 2.5 MHz, 5 MHz, 10 MHz, 15 MHz and 20 MHz HF (Shortwave)
XS (1921-1929),
W8XK (1929-1939),
WPIT (1939-1940)[41] 		Pittsburgh, Pennsylvania November 1920 – December 1939
Owned and operated by Westinghouse Electric Corporation. Used to relay KDKA signal to AM rebroadcasters in other cities.[42] Broadcast programming from KDKA, and also broadcast Northern Messenger to the Arctic. Merged with WBOS (1940) and became a VOA transmitter (1942). 		15,210 kHz, 11,880 kHz, 6,140 kHz[43] 40 kW (1937)[44]
PCJJ Radio Netherlands Worldwide Philips Laboratories at Eindhoven, Netherlands, moved to Hilversum in 1933. The first shortwave station in Europe. 25 June 1926 (test transmissions began), and the first shortwave station in the world with its own dedicated programming rather than being a simulcast of an AM/MW or LW station such as KDKA. Regular broadcast from 30 May 1927 to May 1940 when the station went dark due to the German occupation of Holland; resumed after liberation October 1945 – 1946 when Philips and other shortwave radio stations taken over by Radio Netherlands Worldwide. Sister station PHI broadcast in Dutch to the Dutch East and West Indies from 1928 to 1930 and 1934 to 1949. 30.2 metres shortwave
G2NM[45] Caterham, Surrey, England 11 September 1927. 23 and 33 metres 1 kW
CKUA CKUA Radio Network Edmonton, Alberta
(broadcast province-wide) 		27 November 1927 500-watt (Original)
AM 580 kHz (Edmonton)
Various FM frequencies province-wide 		B
VE9GW CRCX Bowmanville, Ontario April 1930 – 1938 – used to relay CRCT (later CBL) to northern Ontario, northern Manitoba and the Canadian Arctic 6.095 MHz (primarily), 11.810 MHz, 24.380 MHz 25 watt (initially), 200 watts (1031), 500 watts (1932)
HVJ Vatican Radio Vatican City 12 February 1931 10 kW (originally)
HCJB HCJB Quito, Ecuador 25 December 1931 50.26 metres, later 6050 kHz, 9745 kHz, 11775 kHz and 15155 kHz. 200 watts (initially), 1,000 watt (1937), 10,000 watt (1940), 100,000 (1967), 500,000 (1981)
W8XH Buffalo, New York 18 March 1934 – July 1939. Replaced in 1944 with an FM station, now known as WTSS. 51.4 & 41.0 MHz Apex (ultra-shortwave)
W1XOJ Paxton, Massachusetts/Boston, Massachusetts 1937 Unknown
W1XPW, briefly W65H WHCN Hartford, Connecticut 1939 102.9 FM
W2XMN Alpine, New Jersey 1939 – 1946 42.8 MHz, later 44.1 MHz
W2XDA (Schenectady)/W2XOY (New Scotland), later WGFM WRVE Schenectady, New York 1939, 20 November 1940 as W2XOY[46] Originally on FM 48.5 MHz, now FM 99.5 Unknown
W47NV N/A Nashville, Tennessee 1941 to 1951 Unknown

Networks

[edit]
Early radio networks
Name Full name Location On air Notes
British Broadcasting Company United Kingdom 1922–1926 Private commercial company made up of 26 stations by 1926. Nationalised to become the British Broadcasting Corporation (BBC Radio) in 1927.
CNR Radio Canadian National Railway Radio Department Canada 1923–1933 First national radio network in North America.[47] Developed by the Canadian National Railway to provide en route entertainment for train passengers but also available to anyone within signal range. Consisted of 27 stations (3 owned and operated and up to 24 "phantom stations" – time leased on affiliated radio stations.
WEAF chain Broadcasting Company of America Northeast and Midwest United States 1923–1926 Regional network of AT&T-owned radio stations with New York City radio station WEAF as its hub. Grew to 27 stations (WEAF and 26 affiliates) stretching from Boston to Kansas City by the end of 1925 under the name Broadcasting Company of America, Sold to RCA in 1926 and merged with RCA's WJZ chain to form the National Broadcasting Company (NBC)

See also

[edit]

References

[edit]
  1. ^ a b c d Mimi Colligan, Golden Days of Radio, Australia Post, 1991
  2. ^ "Memórias de um Jornalista – Atualidades do mundo da Saúde" (in Brazilian Portuguese). Archived from the original on 2 January 2019. Retrieved 25 January 2019.
  3. ^ a b "The Nobel Prize in Physics 1909".
  4. ^ "TIME LINE – ESTABLISHMENT OF WIRELESS INSTITUTE OF AUSTRALIA"
  5. ^ Bernard Harte, When Radio Was The Cat's Whiskers, 2002, privately published Dural, NSW
  6. ^ "United States: Brant Rock, Mass.", List of Wireless-Telegraph Stations of the World (1 August 1907 edition), page 24.
  7. ^ "Radio Station | WBCR 90.3 FM Beloit College Radio | United States". WBCR. Retrieved 17 March 2022.
  8. ^ "Report of the Department of the Naval Service for the Fiscal Year ending March 31, 1915"
  9. ^ Armstrong, R. (2015), "Broadcasting Policy in Canada", 2nd Edition, University of Toronto Press, p.23; "LE RADIO – Programme du 25 juin", La Presse newspaper, Saturday 24 June 1922
  10. ^ "Union College", Education's Own Stations by S. E. Frost, Jr., PhD, 1937, pages 437–441.
  11. ^ a b c Carty, Bruce, On the Air – Australian Radio History, privately published Gosford NSW, page 25
  12. ^ "The 100th Anniversary of KJR Seattle, 1919 to 2019". 24 December 2019.
  13. ^ a b "Telephone Downtown Soon", "The Radio Amateur" by C. E. Urban, Pittsburgh Gazette Times, 26 October 1919, Sixth section, page 13.
  14. ^ a b "Wireless Phone Installed by Local Firm", "The Radio Amateur" by C. E. Urban, Pittsburgh Gazette Times, 25 January 1920, Fifth section, page 9.
  15. ^ "New Stations: Commercial Land Stations", Radio Service Bulletin, 1 November 1921, page 2.
  16. ^ "Radiophone Concert Schedule", "The Radio Amateur" by C. E. Urban, Pittsburgh Gazette Times, 15 February 1920, Second section, page 4. "Messrs. Williams and Devinney" were Burton P. Williams and Robert C. Devinney.
  17. ^ Revista Telegráfica, May 1923, Page 134
  18. ^ "CKCE (AM)". History of Canadian Broadcasting. Canadian Communications Foundation. Retrieved 9 August 2024.
  19. ^ Radio broadcast-Volume 1-Radio Has Gripped Chicago-pages 503–511
  20. ^ "New KYW Opens December 3rd (page 4)" (PDF). The Microphone. 24 November 1934. Retrieved 14 July 2010.
  21. ^ KYW Newsradio Station History Archived 7 January 2007 at the Wayback Machine, which details the evolution of the station from Chicago, to Philadelphia, to Cleveland and back to Philadelphia.
  22. ^ "Robert Jack (physicist)".
  23. ^ "NZHistory".
  24. ^ "Archived copy". Archived from the original on 26 May 2011. Retrieved 30 July 2008.{{cite web}}: CS1 maint: archived copy as title (link)
  25. ^ "United States Pioneer Broadcast Service Stations". Retrieved 21 January 2020.
  26. ^ "New Stations: Commercial Land Stations", Radio Service Bulletin, April 1, 1922, page 2.
  27. ^ "Radio Service Bulletin" (PDF).
  28. ^ "Shortwave Central: The Story of Radio Broadcasting in Ceylon". 10 April 2012.
  29. ^ "Czech Radio history". Archived from the original on 20 August 2008. Retrieved 27 January 2007.{{cite web}}: CS1 maint: bot: original URL status unknown (link)
  30. ^ "Czech Radio history". Radio Prague International. Retrieved 9 May 2020.
  31. ^ About XEB (in Spanish) Archived 10 August 2013 at the Wayback Machine
  32. ^ "Radiopioneerit tamperelaisella ullakolla". 21 August 2013.
  33. ^ a b Carty, Bruce, On the Air – Australian Radio History, privately published Gosford NSW, page 27
  34. ^ a b c d e f g R R Walker, The Magic Spark: 50 Years of Radio in Australia, The Hawthorn Press, Melbourne, 1973
  35. ^ 第一节 无线广播, shtong.gov.cn
  36. ^ a b Carty, Bruce, On the Air – Australian Radio History, privately published Gosford NSW, page 47
  37. ^ Carty, Bruce, On the Air – Australian Radio History, privately published Gosford NSW, page 74
  38. ^ Carty, Bruce, On the Air – Australian Radio History, privately published Gosford NSW, page 28
  39. ^ "黑龙江省志 广播电视志". Archived from the original on 13 April 2019. Retrieved 9 October 2019.
  40. ^ "History of RTÉ". RTÉ.ie.
  41. ^ "WESTINGHOUSE INTERNATIONAL STATIONS: UNDER NEW CALL LETTERS", The Palestine Post (1933-1950); Jerusalem, Israel [Jerusalem, Israel]22 Sep 1939: 7.
  42. ^ http://explorepahistory.com/hmarker.php?markerId=1-A-3A5 [bare URL]
  43. ^ "QUESTIONS AND ANSWERS: Time Schedule and Channels Used by KDKA's ShortWave Transmitter--Call Is W8XK", The New York Times (1923-Current file); New York, N.Y. [New York, N.Y]17 Aug 1930: 120.
  44. ^ "The Canadian Northern Messenger Service". Wavescan (Adventist World Radio). 4 March 2018. Retrieved 29 September 2020.
  45. ^ Clarricoats, John (1967). World at their fingertips, pub. RSGB, pp. 130–132
  46. ^ "Carnival Atmosphere", Broadcasting, 1 December 1940, page 76.
  47. ^ CNR Company Fonds [permanent dead link‍], Provincial Archives of Alberta. Retrieved 22 January 2008
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