KRDU (1130 AM) is a

commercial Commercial may refer to: * a dose of advertising conveyed through media (such as - for example - radio or television) ** Radio advertisement ** Television advertisement * (adjective for:) commerce, a system of voluntary exchange of products and s ...

radio station Radio broadcasting is transmission of audio (sound), sometimes with related metadata, by radio waves to radio receivers belonging to a public audience. In terrestrial radio broadcasting the radio waves are broadcast by a land-based radio ...

licensed A license (or licence) is an official permission or permit to do, use, or own something (as well as the document of that permission or permit). A license is granted by a party (licensor) to another party (licensee) as an element of an agreeme ...

Dinuba, California Dinuba is a city in Tulare County, California, United States. The population was 21,453 at the 2010 census. It is part of the Visalia-Porterville metropolitan statistical area. The Alta District Museum is located in Dinuba in a restored rai ...

, and serving the

Fresno Fresno () is a major city in the San Joaquin Valley of California, United States. It is the county seat of Fresno County and the largest city in the greater Central Valley region. It covers about and had a population of 542,107 in 2020, maki ...

Visalia Visalia ( ) is a city in the agricultural San Joaquin Valley of California. The population was 141,384 as per the 2020 census. Visalia is the fifth-largest city in the San Joaquin Valley, the 42nd most populous in California, and 192nd in ...

radio market A media market, broadcast market, media region, designated market area (DMA), television market area, or simply market is a region where the population can receive the same (or similar) television and radio station offerings, and may also incl ...

. It airs a

religious Religion is usually defined as a social system, social-cultural system of designated religious behaviour, behaviors and practices, morality, morals, beliefs, worldviews, religious text, texts, sacred site, sanctified places, prophecy, prophecie ...

radio format A radio format or programming format (not to be confused with broadcast programming) describes the overall content broadcast on a radio station. The radio format emerged mainly in the United States in the 1950s, at a time when Radio broadcasting, ...

and is owned by

iHeartMedia, Inc. iHeartMedia, Inc., formerly CC Media Holdings, Inc., is an American mass media corporation headquartered in San Antonio, Texas. It is the holding company of iHeartCommunications, Inc. (formerly Clear Channel Communications, Inc.), a company fou ...

KRDU is regarded as America's first commercial Christian radio station. The studios and offices are located on Shaw Avenue in North Fresno. KRDU broadcasts at 5,000

watt The watt (symbol: W) is the unit of power or radiant flux in the International System of Units (SI), equal to 1 joule per second or 1 kg⋅m2⋅s−3. It is used to quantify the rate of energy transfer. The watt is named after James Wa ...

s by day and is a rare AM station that increases its power at night to 6,200 watts. It uses a

directional antenna A directional antenna or beam antenna is an antenna which radiates or receives greater power in specific directions allowing increased performance and reduced interference from unwanted sources. Directional antennas provide increased performance ...

at all times. The

transmitter In electronics and telecommunications, a radio transmitter or just transmitter is an electronic device which produces radio waves with an antenna (radio), antenna. The transmitter itself generates a radio frequency alternating current, which i ...

towers are off Road 136 in

Cutler, California Cutler is a community and census-designated place (CDP) in Tulare County, California, United States. The population was 5,000 at the 2010 census, up from 4,491 at the 2000 census.The Population as of 2019 is 5,214 up from the 5,000 from the 2010 ce ...

. As of 2019, KRDU is the radio home of the

Fresno Grizzlies The Fresno Grizzlies are a Minor League Baseball team of the California League and the Single-A affiliate of the Colorado Rockies. They are located in Fresno, California, and play their home games at Chukchansi Park, which was opened in 2002 in d ...

, a

Pacific Coast League The Pacific Coast League (PCL) is a Minor League Baseball league that operates in the Western United States. Along with the International League, it is one of two leagues playing at the Triple-A (baseball), Triple-A level, which is one grade bel ...

Triple A minor league baseball team connected with the

Colorado Rockies The Colorado Rockies are an American professional baseball team based in Denver. The Rockies compete in Major League Baseball (MLB) as a member club of the National League (NL) West division. The team plays its home baseball games at Coors Fie ...

History

KRDU

signed on Signing may refer to: * Using sign language * Signature A signature (; from la, signare, "to sign") is a handwritten (and often stylized) depiction of someone's name, nickname, or even a simple "X" or other mark that a person writes on do ...

the air on December 26, 1948, at 1130

kilocycle The cycle per second is a once-common English name for the unit of frequency now known as the hertz (Hz). The plural form was typically used, often written cycles per second, cycles/second, c.p.s., c/s, or, ambiguously, just cycles (Cy./Cyc.). The ...

s. It was owned by the Radio Dinuba Company with studios on L Street. The

call sign In broadcasting and radio communications, a call sign (also known as a call name or call letters—and historically as a call signal—or abbreviated as a call) is a unique identifier for a transmitter station. A call sign can be formally assigne ...

represents Radio DinUba. At first it was a

daytimer A clear-channel station is an AM radio station in North America that has the highest protection from interference from other stations, particularly concerning night-time skywave propagation. The system exists to ensure the viability of cross-co ...

, required to go off the air at night and powered at only 250 watts. In 1949, it moved to 1240 kHz with 250 watts full-time. In 1961, it moved back to 1130 kHz with full-time authorization, powered at 1,000 watts around the clock. In 1975, it added an FM station, KLTA (now

KSOF KSOF (98.9 FM "Soft Rock 98.9") is a commercial radio station licensed to Dinuba, California, and serving Fresno and Tulare counties. It is owned by iHeartMedia, Inc. KSOF carries an adult contemporary radio format, switching to Christmas mu ...

, still co-owned with KRDU). In the 1990s, the power was increased to its current 5,000 watts days and 6,200 watts nights. In 1999, KRDU was acquired by AMFM, Inc.Broadcasting & Cable Yearbook 2000 page D-42
/ref> AMFM was acquired by Clear Channel Communications, which later changed its name to iHeartMedia.

References

External links

* RDU Talk radio stations in the United States RDU Mass media in Fresno County, California Mass media in Tulare County, California Radio stations established in 1947 1946 establishments in California IHeartMedia radio stations {{California-radio-station-stub