AM broadcasting (English Wikipedia)

"The Versatile Audion" by H. Winfield Secor, Electrical Experimenter, February 1920, pages 1000–1001, 1080-1083.
McNicol, Donald Monroe (August 11, 1946). "Radio's conquest of space". New York : Murry Hill – via Internet Archive.
"Election Returns Flashed by Radio to 7,000 Amateurs", The Electrical Experimenter, January 1917, page 650. (archive.org)

arstechnica.com (Global: 473^rd place; English: 338^th place)

Gitlin, Jonathan M. (23 May 2023). "Congress wants AM radio in all new cars—trade groups say that's a mistake". Ars Technica. Retrieved 23 May 2023.

axios.com (Global: 1,139^th place; English: 623^rd place)

Muller, Joann (17 May 2023). "Scoop: Congress moves to preserve AM radio in cars". Axios. Retrieved 18 May 2023.

baltimoresun.com (Global: 588^th place; English: 292^nd place)

Morgan, TaNoah (11 October 2002). "Digital radio approved by FCC". Baltimore Sun.

biennophone.ch (Global: low place; English: low place)

"Sammlung alter Biennophone-Radios". Biennophone.ch. Retrieved 23 July 2017.

books.google.com (Global: 3^rd place; English: 3^rd place)

"A Review of Radio", by Lee de Forest, Radio Broadcast, Vol. 1, No. 4, August 1922, p. 333.
"The First Wireless Time Signal" (letter from Captain J. L. Jayne), Electrician and Mechanic, January 1913, page 52. (Reprinted from The American Jeweler, October 1912, p. 411).
"Radio Apparatus" (advertisement), Radio Amateur News, October 1919, p. 200.
"A Newspaper's Use of the Radio Phone", The Wireless Age, November 1920, p. 10.
"Wireless Transmission of News". Telephony. 71 (27). Chicago: Telephony Publishing Co.: 32–33 December 30, 1916. Retrieved December 23, 2015.
"Foot Ball Score—Via Wireless Telephone" by Morris Press, Radio Amateur News, December 1919, pp. 295, 321.
News by Radiotelephone" (letter from Lee de Forest), Electrical World, April 23, 1921, p. 936.
Hilmes, Michele (2011). Network Nations: A Transnational History of British and American Broadcasting. Routledge. p. 6. ISBN 978-0415883856.
Street, Sean (2002). A Concise History of British Radio, 1922-2002. Kelly Publications. ISBN 9781903053140.
Street, Sean (2002). A Concise History of British Radio, 1922-2002. Kelly Publications. ISBN 9781903053140.
David J. Hess; Professor David J Hess; Robert Gottlieb (2009). Localist Movements in a Global Economy Sustainability, Justice, and Urban Development in the United StatesStates. MIT Press. p. 199. ISBN 9780262012645. Retrieved 7 February 2021.

commlawblog.com (Global: low place; English: low place)

"FCC OK's AM on FM Translators" by FHH Law, June 30, 2009 (commlawblog.com).

commons.wikimedia.org (Global: 484^th place; English: 698^th place)

"Will Give Concert by Wireless Telephone", San Jose Mercury Herald, July 21, 1912, page 27.
"The News Radiophone To Give Vote Results", Detroit News, August 31, 1920, pp. 1–2.
"To Give Election Results by Radio", Cleveland Plain Dealer, October 28, 1920, p. 10.

digitalradioinsider.blogspot.com (Global: low place; English: low place)

"Digital Radio FM Insider: DRM Advantage for Terrestrial Digital Radio in Italy and India". November 23, 2024.
"Digital Radio FM Insider: Radio Industry Urges Indian Government to Opt for DRM For Digital Radio". 2025-01-11.

drm.org (Global: low place; English: low place)

ebu.ch (Global: 5,698^th place; English: 5,387^th place)

tech.ebu.ch

"TECHNICAL BASES FOR DRM SERVICES COVERAGE PLANNING" (PDF). tech.ebu.ch.

espacenet.com (Global: 950^th place; English: 813^th place)

worldwide.espacenet.com

"Method of Producing Alternating Currents With a High Number of Vibrations" U.S. patent 789,449, filed June 10, 1903, and granted May 9, 1905, to Valdemar Poulsen.

fcc.gov (Global: 583^rd place; English: 261^st place)

"AM Stereo Broadcasting"^{[permanent dead link]} (fcc.gov)
"Digital Radio" (fcc.gov)

federalregister.gov (Global: 2,513^th place; English: 1,292^nd place)

"Proposed rule: All-digital AM broadcasting, revitalization of the AM radio service". The Federal Register. 25 November 2019.
"Final rule: All-digital AM broadcasting, revitalization of the AM radio service". The Federal Register. 3 December 2020.
"Proposed Rule: Revitalization of the AM Radio Service", Federal Register, November 20, 2018.

fybush.com (Global: low place; English: 9,085^th place)

Scott Fybush. "Limbaugh Dead; What Next for Talk Radio?" Fybush.com. February 17, 2021. Retrieved July 10, 2024.

hathitrust.org (Global: 296^th place; English: 153^rd place)

babel.hathitrust.org

"Wireless Telegraphy", The Electrician (London), October 14, 1898, pp. 814–815.
"Hertzian Telegraphy at the Physical Society, The Electrician (London), January 28, 1898, pp. 452–453.
"Vest-Pocket Wireless Receiving Instrument", Electrical Review and Western Electrician, April 11, 1914, p. 745.
"A Newspaper's Use of the Radio Phone", The Wireless Age, November 1920, page 10.
"Experiments and Results in Wireless Telephony", by John Grant, The American Telephone Journal, January 26, 1907, pp. 49–51.
"Experiments and Results in Wireless Telephony" by John Grant, The American Telephone Journal. Part I: January 26, 1907, pp. 49–51; Part II: February 2, 1907, pp. 68–70, 79–80.
"Wireless Telephony: G. Possibilities" by Reginald A. Fessenden, Transactions of the American Institute of Electrical Engineers, Vol. XXVII (1908), Part I, pp. 606–608.
Fessenden: Builder of Tomorrows by Helen Fessenden, 1940, pp. 153–154.
"Miscellaneous: Amendments to Regulations", Radio Service Bulletin, January 3, 1922, p. 10.
"KDKA", The Wireless Age, August 1922, p. 40.
"Radio Fans to Pay Tribute to John Bull", Popular Radio, November 1922, p. 222.
"Statement of Major Edwin H. Armstrong" (January 15, 1948), "Restrictive union practices of the American Federation of Musicians", United States Congress, House Committee on Education and Labor (1948 hearings), pages 144-145.
"Mass Media Bureau Announces Revised AM Expanded Band Allotment Plan and Filing Window for Eligible Stations" (FCC DA 97-537), March 17, 1997.
"Report and Order: In the Matter of Amendment of Service and Eligibility Rules for FM Broadcast Translator Stations" (MB Docket Mo. 07-172, RM-11338), June 29, 2009, pages 9642–9660.

ieee.org (Global: 912^th place; English: 722^nd place)

ewh.ieee.org

"Fessenden, Reginald A. Inventing the Wireless Telephone and the Future". IEEE. Retrieved 2017-07-22.

itu.int (Global: 1,487^th place; English: 1,305^th place)

handle.itu.int

Final Acts of the Regional Radio Conference to Establish a Plan for the Broadcasting Service in the Band 1605-1705 in Region 2 (PDF) (Rio de Janeiro, 1988, ITU.int)

kintronic.com (Global: low place; English: low place)

"Smart AM Receivers for the 21st Century" by Stephen F. Smith and Thomas F. King, Proceedings of the National Association of Broadcasters Engineering Conference, Las Vegas, Nevada, April 12, 2015, pages 1-2.

loc.gov (Global: 63^rd place; English: 47^th place)

chroniclingamerica.loc.gov

"Mysterious Voices Startled Him: Wizard Isbell Thought He Heard Angels Talking", Hawaiian Star, November 25, 1908, p. 1.
"Hear Tenor Through Wireless", Washington Evening Star, 29 March 1914, Part one, p. 2.

news.google.com (Global: 67^th place; English: 32^nd place)

"Wireless Concert Given for Ottawa", Montreal Gazette, May 21, 1920, p. 4.
"The Radio Amateur: Wireless Telephone Here" by C. E. Urban, Pittsburgh Gazette Times, Sixth section, p. 13.
"Announcing the National Broadcasting Company, Inc." (advertisement), Reading (Pennsylvania) Eagle, September 13, 1926, p. 10.

nlb.gov.sg (Global: 562^nd place; English: 301^st place)

eresources.nlb.gov.sg

"20th Anniversary of First Broadcast" by Raymond Braillard, The (Singapore) Straits Times, 25 April 1934, p. 17 (reprinted from the British Broadcasting Corporation's World-Radio, 30 March 1934, p. 446) (nlb.gov.sg).

nytimes.com (Global: 7^th place; English: 7^th place)

Levenson, Michael (2022-12-10). "In a Future Filled With Electric Cars, AM Radio May Be Left Behind". The New York Times. ISSN 0362-4331. Retrieved 2022-12-29.

pbs.org (Global: 260^th place; English: 176^th place)

"A Science Odyssey: Radio Transmission: FM vs AM". pbs.org. Retrieved December 29, 2022.

post-gazette.com (Global: 819^th place; English: 433^rd place)

"Radio fans' holiday joy: KQV is back on the air" by Maria Sciullo, Pittsburgh Post-Gazette, December 24, 2019.

radioinsight.com (Global: 2,269^th place; English: 937^th place)

"1560 WFME New York To Suspend Operations Friday" by Lance Venta, February 11, 2021 (radioinsight.com).

radionacional.com.ar (Global: low place; English: low place)

"La Verdadera Historia de los Locos de la Azotea – Radio Nacional".

radioworld.com (Global: low place; English: low place)

"Dec. 21, 1906: A Very Significant Date in Radio" by James E. O'Neal, December 22, 2016 (radioworld.com).
"Fessenden—The Next Chapter" by James E. O'Neal, Radio World, December 23, 2008 (radioworld.com).
"Fessenden, World's First Broadcaster?" by James E. O'Neal, Radio World, October 25, 2006 (radioworld.com).
"Whatever Happened to Shortwave Radio?" by James Careless, March 8, 2010 (radioworld.com).
"Life on Expanded Band Is (Pretty) Good" by Randy J. Stine, February 28, 2006 (radioworld.com)
"Uses of FM Translators Morph Quickly" by Randy J. Stine, August 3, 2011 (radioworld.com)
"Special Report: AM Advocates Watch and Worry" by Randy J. Stine, October 5, 2020 (radioworld.com)

rbr.com (Global: low place; English: 5,519^th place)

Gutmann, Peter (23 August 2007). "HD Radio rules take effect". Radio+Television Business Report (RBR.com).

redtech.pro (Global: low place; English: low place)

Staff, RedTech (2024-12-04). "China accelerates DRM adoption in automotive industry".

storage.googleapis.com (Global: 4,648^th place; English: 2,969^th place)

patentimages.storage.googleapis.com

U.S. Patent 706,737, submitted May 29, 1901, and issued August 12, 1902, to Reginald Fessenden.

thedrive.com (Global: 2,470^th place; English: 1,575^th place)

Gilboy, James (2022-07-06). "Automakers Are Starting to Drop AM Radio in New Cars. Here's Why". The Drive. Retrieved 2022-12-29.

theradiohistorian.org (Global: low place; English: low place)

"America's Apex Broadcasting Stations of the 1930s" by John Schneider, Monitoring Times Magazine, December 2010. (theradiohistorian.com)

usg.edu (Global: 6,162^nd place; English: 3,046^th place)

gahistoricnewspapers.galileo.usg.edu

"Kentucky Inventor Solves Problem of Wireless Telephony", The Sunny South, March 8, 1902, p. 6.

wfmynews2.com (Global: low place; English: low place)

"VERIFY: Why Does AM Radio Sound Worse Than FM?". wfmynews2.com. November 6, 2017. Retrieved 2022-12-29.

worldcat.org (Global: 4^th place; English: 4^th place)

search.worldcat.org

Levenson, Michael (2022-12-10). "In a Future Filled With Electric Cars, AM Radio May Be Left Behind". The New York Times. ISSN 0362-4331. Retrieved 2022-12-29.

worldradiohistory.com (Global: 127^th place; English: 68^th place)

"Election Returns Flashed by Radio to 7,000 Amateurs", Electrical Experimenter, Vol. 4, No. 9, January 1917, p. 650.
WWJ (advertisement), Broadcasting Magazine, August 20, 1945, p. 31. (americanradiohistory.com)
"RIO is stage for AM spectrum conference", Broadcasting, May 23, 1988, pp. 55–56.
"FCC Votes To Proceed With AM-Band Improvement Plans" by Bill Holland, Billboard, April 28, 1990, page 10.

wpr.org (Global: low place; English: 5,759^th place)

Wisconsin Public Radio's Tradition Of Innovation (wpr.org)

AM broadcasting (English Wikipedia)

americanradiohistory.com (Global: 3,253rd place; English: 3,182nd place)

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commlawblog.com (Global: low place; English: low place)

commons.wikimedia.org (Global: 484th place; English: 698th place)

digitalradioinsider.blogspot.com (Global: low place; English: low place)

drm.org (Global: low place; English: low place)

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worldradiohistory.com (Global: 127th place; English: 68th place)

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