Teresa Palomo Acosta
Raoul Cortez, Founder of KCOR.
Raoul Cortez first applied for a radio broadcasting license in the mid-1940s. His station, KCOR, broadcasting on 1350 AM out of San Antonio, was one of the first full-time Spanish-language radio stations in the United States. Image courtesy of the National Museum of American History, Smithsonian Institution. Image available on the Internet and included in accordance with Title 17 U.S.C. Section 107.

KCOR. KCOR, one of the first Spanish-language radio stations in the United States, began broadcasting in San Antonio on February 15, 1946. Raoul Alfonso Cortez, its founder, applied for a broadcasting license in the mid-1940s. Cortez asserted in his application that a Spanish-language radio station would lend support for the war effort among the nation’s Spanish speakers. He received approval for the license for KCOR (the call sign was derived by using the first three letters of Cortez’s name), broadcasting over frequency 1350 AM in 1946, after restrictions on foreign language broadcasting were lifted following the end of World War II. This was the first full-time Spanish-language radio station owned by a Mexican American in the United States.

KCOR-AM’s founder was a trailblazer in mass media. Formerly a reporter for La Prensa in San Antonio and a booking agent for Spanish-language entertainers, to make his way into radio broadcasting he entered the broker system and purchased time on stations that he would then sell to advertisers and performers. Despite the domination of the local broadcast system by Anglo entrepreneurs, Cortez made inroads, leading to the establishment of a Spanish-language station in a city with an overwhelmingly large Mexican-origin, Spanish-speaking population.

Harnessing La Voz Mexicana (“The Voice of Mexican Americans”) as its slogan, KCOR-AM initially broadcast on 5,000 watts. Over time, its audience grew, as many listeners were attracted to the station’s offerings. KCOR became successful by employing salespeople and by using a survey to count the number of listeners, who were asked to provide the station with the labels of products they used. This effort revealed that Spanish-speaking residents in the city did indeed purchase many products sold across the nation and that businesses should therefore advertise on KCOR.

Among the station’s great successes was La Hora del Teatro Nacional, a radio drama led by Leonardo “Lalo” García Astol, a Tejano who served both as an announcer and director for the station. La Hora del Teatro Nacional was broadcast across the United States due to its popularity. Mateo Camargo became another prominent host. He offered a weekly political program Frente al Pueblo (Face the People). KCOR also increased its audience by employing actors and writers to fill its airwaves with variety shows and serial dramas. In addition, the station featured the works of Mexican musicians—offering música norteña and corridos, for example—and added programming for the African American community in the late night hours. 

Staff at KCOR.
Raoul Cortez (seated) and the staff of KCOR-AM in 1949. Image courtesy of the National Museum of American History, Smithsonian Institution. Image available on the Internet and included in accordance with Title 17 U.S.C. Section 107.

The total number of hours of weekly Spanish-language radio broadcasts in 1941 in Texas, Arizona, California, and New York combined was estimated to be 264 per week. With its entry into radio broadcasting at almost mid-twentieth century, KCOR vastly increased the number of hours of weekly Spanish-language radio broadcasts in those states. Combined, these stations offered musical entertainment and community services such as information on immigration and American citizenship. The Sombrero Network, which Cortez also established, served to unite Spanish-language broadcasters to work on issues that were important to the Mexican American community.

Cortez expanded his broadcasting operations and launched KCOR-TV, the first Spanish-language and Hispanic-owned television station in the United States, on June 10, 1955, and the station ultimately became the bedrock of the Spanish International Network (of which Cortez’s son-in-law Emilio Nicolas, Sr., was part owner), the forerunner to Univision. By 1961 Cortez sold his radio station to Inter-American Radio, Inc., which was owned by a group of Anglo media investors. In 1975 KCOR was owned by the Harbenito Radio Corporation, which was originally founded by McHenry Tichenor. Part of the Tichenor Media System, the AM station was part of the Hispanic Broadcasting Corporation after a merger in 1997 and subsequently part of Univision Communications after a merger in 2003. Under the ownership of Univision, KCOR-AM has remained on the air as a Spanish-language radio station.

KCOR-AM and its founder Raoul Cortez were honored in 2015 by the Smithsonian Institution for contributions to American media and business in its American Enterprise exhibit in the National Museum of American History. 


Jordan Grant, “Earning a place on the dial: Raoul Cortez, KCOR, and Spanish-language radio,” National Museum of American History (https://americanhistory.si.edu/blog/earning-place-dial-raoul-cortez-kcor-and-spanish-language-radio), accessed August 19, 2019. KCOR: Broadcasting Station License Record (History Cards), Federal Communications Commission (https://licensing.fcc.gov/cgi-bin/prod/cdbs/forms/prod/getimportletter_exh.cgi?import_letter_id=34785), accessed September 7, 2019. Lisa Cortez Walden, “The History of Spanish Language Media in Texas, KCOR ‘Amor 95.1’ and ‘Radio Recuerdo 1350 AM’” (http://colfa.utsa.edu/users/jreynolds/HIS6913/Walden/latino%20media%20pages/KCOR%20page.html), accessed August 19, 2019.

Image Use Disclaimer

All copyrighted materials included within the Handbook of Texas Online are in accordance with Title 17 U.S.C. Section 107 related to Copyright and “Fair Use” for Non-Profit educational institutions, which permits the Texas State Historical Association (TSHA), to utilize copyrighted materials to further scholarship, education, and inform the public. The TSHA makes every effort to conform to the principles of fair use and to comply with copyright law.

For more information go to: http://www.law.cornell.edu/uscode/17/107.shtml

If you wish to use copyrighted material from this site for purposes of your own that go beyond fair use, you must obtain permission from the copyright owner.


The following, adapted from the Chicago Manual of Style, 15th edition, is the preferred citation for this article.

Handbook of Texas Online, Teresa Palomo Acosta, "KCOR," accessed September 19, 2019, http://www.tshaonline.org/handbook/online/articles/ebk02.

Uploaded on September 10, 2019. Published by the Texas State Historical Association.
visit the mytsha forums to participate

View these posts and more when you register your free MyTSHA account.

Call for Papers: Texas Center for Working-Class Studies Events, Symposia, and Workshops
Hi all! You may be interested in this call for papers I received from the Texas Center for Working-Class Studies at Collin College...

Katy Jennings' Ride Scholarly Research Request
I'm doing research on Catherine Jennings Lockwood, specifically the incident known as "Katy Jennings' Ride." Her father was Gordon C. Jennings, the oldest man to die at the Alamo...

Texas Constitution of 1836 Co-Author- Elisha Pease? Ask a Historian
The TSHA profile of Elisha Marshall Pease states that he wrote part of the Texas Constitution although he was only a 24 year-old assistant secretary (not elected). I cannot find any other mention of this authorship work by Pease in other credible research about the credited Constution authors...