53-623: WSBC (1240 kHz ) is a commercial AM radio station in Chicago , Illinois . It broadcasts brokered programming , mostly ethnic and religious. It is owned by Hearland Signal LLC. WSBC transmits with 1,000 watts . Its transmitter site is on North Milwaukee Avenue at West Catalpa Avenue in Chicago. It shares its tower with sister station WCPT (820 AM). WSBC features programming aimed at ethnic communities including Russian , Ukrainian , Latino , Italian , Latvian and Irish . Hosts buy time on
106-541: A Catholic talk format. Hosts included Ray Guarendi , Raymond Flynn , Dan Lungren , and Al Kresta . In April 2000, Catholic Family Radio placed all of its radio stations up for sale, and on May 29, most of Catholic Family Radio's programming was replaced by EWTN Radio , with Al Kresta's show being the only Catholic Family Radio show remaining on the station. In early 2001, WYPA was purchased by Newsweb Corporation for $ 10.5 million. On March 1, 2001, One on One Sports moved its programming from WJKL to WYPA, and
159-524: A beautiful music format in early 1963, which it continued to air through the 1970s. It was branded "The World's Most Beautiful Music" and used the slogan "try a little tenderness". Personalities heard on WAIT during this era included Ken Alexander, Dick Buckley , and John Doremus . In 1967, the station applied to the Federal Communications Commission for a waiver of its clear-channel rules so that it could operate at night. When
212-487: A hot AC format branded "The Point," simulcasting WPNT-FM. In early January 1991, the station was taken off the air, as its owner disposed of its transmitter site in Elmhurst, Illinois. In late 1991, the station was sold to Diamond Broadcasting. At 7:15 a.m. on January 2, 1992, it returned to the air from a new site in Chicago's Cragin neighborhood, though without nighttime operations. It became WSCR "The Score,"
265-463: A Spanish language talk format as an affiliate of "Radio Unica." Personalities heard on Radio Unica included Pedro Sevcec , Isabel Gómez-Bassols , among others. In 1998, the station's owner, Achievement Radio Holdings, merged with Z-Spanish Media. On May 15, 1999, Radio Unica moved to 950 WNTD , though it continued to simulcast on WYPA. In mid-1999, the station was purchased by Catholic Family Radio for $ 10.5 million, and on June 9 it began airing
318-584: A chart of the top 20 popular songs in Chicago. Reed Farrell and Lloyd 'Spider' Webb were DJs on the station during this period. In 1957, the station's studios were moved to the Steuben Club Building . In 1963, its studios were moved back to its transmitter site in Elmhurst, though its offices remained in the Steuben Club Building. In 1962, the station was sold to a partnership led by Maurice and Lois Rosenfield, for $ 1 million. It adopted
371-612: A day, although it reduces power to 1,500 watts after sunset so not to interfere with WBAP in Fort Worth. On June 2, 2014, WCPT-FM and WCPQ broke away from the simulcast, and 92.5 in DeKalb took the WCPT-FM call sign. In 2016, WCPT's daytime power was increased to 5,800 watts, and its daytime transmitter was moved to Chicago's Jefferson Park neighborhood. In 2018, WCPT-FM was sold to Educational Media Foundation and became an affiliate of K-Love ,
424-437: A fire set by a teenager who believed Voliva had swindled his father. Its transmitter site was relocated to Addison Township , in what today is part of Elmhurst, Illinois , and its studios were moved to 2400 W. Madison in Chicago. WCBD shared WMBI's transmitter while its new transmitter was being built. In 1940, Voliva filed suit against WCBD, alleging that the station's insistence that he provide scripts of speeches violated
477-548: A more detailed treatment of this and the above frequency ranges, see Electromagnetic spectrum . Gravitational waves are also described in Hertz. Current observations are conducted in the 30–7000 Hz range by laser interferometers like LIGO , and the nanohertz (1–1000 nHz) range by pulsar timing arrays . Future space-based detectors are planned to fill in the gap, with LISA operating from 0.1–10 mHz (with some sensitivity from 10 μHz to 100 mHz), and DECIGO in
530-560: A motivational talk format as "Personal Achievement Radio", and its call sign was changed to WYPA. Its programming was presented in short segments, less than ten minutes long, and included material culled from the libraries of self-help publishers featuring speakers such as Tony Robbins , as well as locally produced segments featuring Wayne Messmer and Mary Laney. Weekends featured longer shows, with local hosts such as Les Brown , as well as brokered programming . On June 9, 1998, "Personal Achievement Radio" moved to WNDZ , and WYPA adopted
583-488: A non-compete agreement. WEDC ceased broadcasting in 1997. WSBC began broadcasting from WEDC's transmitter site and it began full-time operations. In 1998, the station was sold to Newsweb Corporation for $ 5,550,000. Some of the station's programs were simulcast on 1470 WCFJ in Chicago Heights, Illinois . In June 1998, WSBC began airing LesBiGay Radio weekday evenings. The program was heard on WSBC until April 2001, and
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#1733085920522636-634: A series of temporary authorizations starting on May 3, 1927. In addition, they were informed that if they wanted to continue operating, they needed to file a formal license application by January 15, 1928, as the first step in determining whether they met the new "public interest, convenience, or necessity" standard. On May 25, 1928, the FRC issued General Order 32 , which notified 164 stations, including WSBC, that "From an examination of your application for future license it does not find that public interest, convenience, or necessity would be served by granting it." However,
689-509: Is a commercial progressive talk radio station licensed to Willow Springs, Illinois . Owned by Heartland Signal LLC, the station serves the Chicago metropolitan area . The station's studios and daytime transmitter are located in the Jefferson Park neighborhood on Chicago's Northwest Side , while its nighttime transmitter is located in Joliet . On June 23, 1923, the station signed on using
742-428: Is one per second or the reciprocal of one second . It is used only in the case of periodic events. It is named after Heinrich Rudolf Hertz (1857–1894), the first person to provide conclusive proof of the existence of electromagnetic waves . For high frequencies, the unit is commonly expressed in multiples : kilohertz (kHz), megahertz (MHz), gigahertz (GHz), terahertz (THz). Some of the unit's most common uses are in
795-466: Is the Planck constant . The hertz is defined as one per second for periodic events. The International Committee for Weights and Measures defined the second as "the duration of 9 192 631 770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium -133 atom" and then adds: "It follows that the hyperfine splitting in the ground state of
848-452: Is usually measured in kilohertz (kHz), megahertz (MHz), or gigahertz (GHz). with the latter known as microwaves . Light is electromagnetic radiation that is even higher in frequency, and has frequencies in the range of tens of terahertz (THz, infrared ) to a few petahertz (PHz, ultraviolet ), with the visible spectrum being 400–790 THz. Electromagnetic radiation with frequencies in the low terahertz range (intermediate between those of
901-446: The 0.1–10 Hz range. In computers, most central processing units (CPU) are labeled in terms of their clock rate expressed in megahertz ( MHz ) or gigahertz ( GHz ). This specification refers to the frequency of the CPU's master clock signal . This signal is nominally a square wave , which is an electrical voltage that switches between low and high logic levels at regular intervals. As
954-468: The 1970s. In some usage, the "per second" was omitted, so that "megacycles" (Mc) was used as an abbreviation of "megacycles per second" (that is, megahertz (MHz)). Sound is a traveling longitudinal wave , which is an oscillation of pressure . Humans perceive the frequency of a sound as its pitch . Each musical note corresponds to a particular frequency. An infant's ear is able to perceive frequencies ranging from 20 Hz to 20 000 Hz ;
1007-470: The 1993–1994 season, but their status as a daytimer limited the number of games they could air. Night games instead aired on 92.7 WCBR-FM . On November 10, 1994, WSCR was granted a construction permit to broadcast at night, running 1,200 watts from a site in Lemont, Illinois . In 1995, the station was sold to Westinghouse (Group W), along with WXRT , for $ 60 million. Westinghouse decided against building
1060-527: The Chicago metropolitan area. The WCPT call letters moved along with the format to 820 AM, and the WAIT call letters returned to 850 AM. Hosts included Ed Schultz , Stephanie Miller , Randi Rhodes , Thom Hartmann , Bill Press , and Robert F. Kennedy Jr. On March 29, 2008, Jake Hartford joined WCPT, hosting Saturday mornings. On May 19, 2008, WCPT began airing The Rachel Maddow Show , and in January 2010
1113-514: The FCC denied its application, it appealed to the D.C. Court of Appeals , which upheld the FCC's decision. In autumn 1976, the station shifted to an adult contemporary format. In October 1977, WAIT switched to a talk format. However, its ratings dropped considerably after it abandoned the beautiful music format, and in August 1978 it returned to the beautiful music format it had long aired. In 1979,
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#17330859205221166-638: The Hotel Crillon) at 13th and Michigan Avenue. Since the station began broadcasting, it has featured a wide variety of ethnic programming. The Sousa Archives and Center for American Music holds the Frank Scheibenreif Slovak, Czech, and Romi Sound Recording Collection, ca. 1930-1950. This collection includes 1,001 recordings, including 753 78-R.P.M., 140 45-R.P.M., and 108 LPs; and one book documenting Eastern Europe music prior to World War II, principally from Czechoslovakia and used by Scheibenreif for
1219-446: The WSBC show, "Slovak American Radio Review." WSBC hired the nation's first full-time African-American radio announcer, Jack Cooper , who on November 3, 1929, began hosting The All-Negro Hour , a vaudevillesque entertainment program. On April 1, 1933, Gene Dyer purchased WSBC from C.J. Gordon, who had operated it since August 1932. At the time, Dyer also owned WGES in Chicago. In 1936,
1272-476: The average adult human can hear sounds between 20 Hz and 16 000 Hz . The range of ultrasound , infrasound and other physical vibrations such as molecular and atomic vibrations extends from a few femtohertz into the terahertz range and beyond. Electromagnetic radiation is often described by its frequency—the number of oscillations of the perpendicular electric and magnetic fields per second—expressed in hertz. Radio frequency radiation
1325-569: The caesium 133 atom is exactly 9 192 631 770 hertz , ν hfs Cs = 9 192 631 770 Hz ." The dimension of the unit hertz is 1/time (T ). Expressed in base SI units, the unit is the reciprocal second (1/s). In English, "hertz" is also used as the plural form. As an SI unit, Hz can be prefixed ; commonly used multiples are kHz (kilohertz, 10 Hz ), MHz (megahertz, 10 Hz ), GHz (gigahertz, 10 Hz ) and THz (terahertz, 10 Hz ). One hertz (i.e. one per second) simply means "one periodic event occurs per second" (where
1378-592: The call sign WCBD, broadcasting at 870 kHz. The station was located in Zion, Illinois , and was owned by Wilbur Glenn Voliva , who was the "General Overseer" of the Christian Catholic Apostolic Church , and was known for his flat Earth beliefs. WCBD was non-commercial, airing religious programming that reflected Voliva's viewpoints, along with vocal and instrumental music. The station originally ran at 500 watts. On February 2, 1925, its power
1431-422: The description of periodic waveforms and musical tones , particularly those used in radio - and audio-related applications. It is also used to describe the clock speeds at which computers and other electronics are driven. The units are sometimes also used as a representation of the energy of a photon , via the Planck relation E = hν , where E is the photon's energy, ν is its frequency, and h
1484-611: The entire day. On May 3, 2005, the station's call letters were changed back to WAIT when Newsweb's WAIT (850 AM) launched a progressive talk format with the new call letters WCPT. Newsweb's owner, Fred Eychaner , is a significant donor to Democratic Party causes. Later that year, the station's city of license was changed from Chicago to Willow Springs. In October 2007, Relevant Radio moved to WNTD, though it continued to simulcast on WAIT until November 25. On November 26, 2007, Chicago's Progressive Talk moved from 850 AM to 820 AM, doubling its power and providing coverage to all of
1537-440: The event being counted may be a complete cycle); 100 Hz means "one hundred periodic events occur per second", and so on. The unit may be applied to any periodic event—for example, a clock might be said to tick at 1 Hz , or a human heart might be said to beat at 1.2 Hz . The occurrence rate of aperiodic or stochastic events is expressed in reciprocal second or inverse second (1/s or s ) in general or, in
1590-507: The first all-sports station in Chicago. The Score's original hosts included Tom Shaer, Dan Jiggetts partnered with Mike North , and Dan McNeil. McNeil would later be partnered with Terry Boers . Former Chicago Bears coach Mike Ditka hosted a weekly show in 1992, and served as an analyst during football season until 1997, when he was hired to coach the New Orleans Saints . WSCR carried Illinois Fighting Illini basketball in
1643-449: The hertz has become the primary unit of measurement accepted by the general populace to determine the performance of a CPU, many experts have criticized this approach, which they claim is an easily manipulable benchmark . Some processors use multiple clock cycles to perform a single operation, while others can perform multiple operations in a single cycle. For personal computers, CPU clock speeds have ranged from approximately 1 MHz in
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1696-413: The highest normally usable radio frequencies and long-wave infrared light) is often called terahertz radiation . Even higher frequencies exist, such as that of X-rays and gamma rays , which can be measured in exahertz (EHz). For historical reasons, the frequencies of light and higher frequency electromagnetic radiation are more commonly specified in terms of their wavelengths or photon energies : for
1749-426: The hits of the 1940s, 1950s, and 1960s. The station aired Chuck Schaden 's Radio Theatre weekday evenings. Eddie Hubbard joined WAIT in 1983, and hosted the morning drive show. Dick Buckley hosted a jazz program Saturday nights from 1984 to 1985. On April 7, 1986, the station began airing a soft adult contemporary format as "Cozy" WCZE. Gary Parks hosted morning drive, while the rest of its programming
1802-516: The late 1970s ( Atari , Commodore , Apple computers ) to up to 6 GHz in IBM Power microprocessors . Various computer buses , such as the front-side bus connecting the CPU and northbridge , also operate at various frequencies in the megahertz range. Higher frequencies than the International System of Units provides prefixes for are believed to occur naturally in the frequencies of
1855-513: The nighttime transmitter site in Lemont, and instead made plans to move "The Score" to 1160 AM . The construction permit to add nighttime operations was cancelled. On April 7, 1997, at 2:30 p.m., "The Score" moved to 1160 AM, along with the WSCR call letters. In early 1997, the station was sold to N. John Douglas's Personal Achievement Radio, Inc. for $ 7.5 million. On April 7, 1997, it began airing
1908-677: The quantum-mechanical vibrations of massive particles, although these are not directly observable and must be inferred through other phenomena. By convention, these are typically not expressed in hertz, but in terms of the equivalent energy, which is proportional to the frequency by the factor of the Planck constant . The CJK Compatibility block in Unicode contains characters for common SI units for frequency. These are intended for compatibility with East Asian character encodings, and not for use in new documents (which would be expected to use Latin letters, e.g. "MHz"). WCPT (AM) WCPT (820 AM )
1961-544: The rules for capitalisation of a common noun ; i.e., hertz becomes capitalised at the beginning of a sentence and in titles but is otherwise in lower case. The hertz is named after the German physicist Heinrich Hertz (1857–1894), who made important scientific contributions to the study of electromagnetism . The name was established by the International Electrotechnical Commission (IEC) in 1935. It
2014-413: The specific case of radioactivity , in becquerels . Whereas 1 Hz (one per second) specifically refers to one cycle (or periodic event) per second, 1 Bq (also one per second) specifically refers to one radionuclide event per second on average. Even though frequency, angular velocity , angular frequency and radioactivity all have the dimension T , of these only frequency is expressed using
2067-519: The station adopted a sports format. On March 26, 2001, One-on-One Sports' name was changed to Sporting News Radio, and the station's call sign was changed to WCSN. Personalities heard on the station included Jay Mariotti , Chet Coppock , Phil Jackson , and Bruce Murray . In April 2003, Starboard Broadcasting began leasing two hours of airtime a day to air the Relevant Radio Catholic network. On December 1, 2003, it began leasing
2120-592: The station and may offer their services or seek donations during their shows. WSBC was first licensed on June 26, 1925, to the World Battery Company at 1219 South Wabash Avenue, transmitting on 1430 kHz. Its call sign stood for "World Storage Battery Company". In 1926, its frequency was changed to 1040 kHz and in 1927 it was changed to 1290 kHz. Following the establishment of the Federal Radio Commission (FRC), stations were initially issued
2173-657: The station began airing The Norman Goldman Show . In late October 2008, the station started simulcasting on 92.7 WCPT-FM in Arlington Heights , 92.5 WCPY in DeKalb , and 99.9 WCPQ in Park Forest . On March 19, 2009, WCPT and WIND hosted "The Great Debate", featuring Thom Hartmann representing the liberal viewpoint and Michael Medved representing the conservative viewpoint, and moderated by Cisco Cotto and Dick Kay. On April 29, 2010, WCPT began broadcasting 24 hours
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2226-480: The station successfully convinced the commission that it should remain licensed. On November 11, 1928, the FRC implemented a major reallocation of station transmitting frequencies, as part of a reorganization resulting from its implementation of General Order 40 . WSBC was assigned to 1210 kHz, sharing time with WCRW and WEDC . Its studios and transmitter were located at the New Southern Hotel (later known as
2279-461: The station until 1956, when he began hosting a nighttime show on 670 WMAQ . In 1951, the station's studios were moved to its transmitter site in Elmhurst. In 1954, it was sold to Robert Oscar Miller and family. Nelson Eddy , the Wayne King Orchestra , Liberace , Coke Time with Eddie Fisher , and The Hour of Charm were heard on WAIT in the 1950s. In the mid-1950s, WAIT published
2332-513: The station's license was assigned to Century Chicago Broadcasting, a partnership of Century Broadcasting Corporation and the station's previous owners. In 1980, it applied to the FCC for a construction permit to add nighttime operations at 1,000 watts. The permit was granted in 1981, and it began nighttime operations by 1982. In 1981, the station started carrying Northwestern Wildcats football games. In October 1982, WAIT began airing an adult standards format branded "Great Hits", featuring
2385-718: The station's studios and transmitter were moved to the West Town State Bank Building at 2400 W. Madison. Its frequency was changed to 1240 kHz in March 1941, as a result of the North American Regional Broadcasting Agreement . In 1944, WSBC was sold to the J. Miller Advertising Agency for $ 100,000. In 1954, the station was sold to Louis Lee for $ 180,000. In 1976, control of the station was passed to Louis Lee's son, Danny Lee. In 1996, WSBC's owners purchased WCRW for $ 564,375, plus $ 160,000 for
2438-615: The terms of his contract, which allowed him to speak on the station without censorship. Dyer stated that the requirement was necessary because Voliva had violated his promise not to air his political views. WCBD's frequency was changed to 1110 kHz in March 1941, as a result of the North American Regional Broadcasting Agreement . In June 1941, the station's frequency was changed to 820 kHz. It ran 5,000 watts, signing off at sunset in Dallas to protect WBAP in Fort Worth . The call sign
2491-480: The unit hertz. Thus a disc rotating at 60 revolutions per minute (rpm) is said to have an angular velocity of 2 π rad/s and a frequency of rotation of 1 Hz . The correspondence between a frequency f with the unit hertz and an angular velocity ω with the unit radians per second is The hertz is named after Heinrich Hertz . As with every SI unit named for a person, its symbol starts with an upper case letter (Hz), but when written in full, it follows
2544-482: Was adopted by the General Conference on Weights and Measures (CGPM) ( Conférence générale des poids et mesures ) in 1960, replacing the previous name for the unit, "cycles per second" (cps), along with its related multiples, primarily "kilocycles per second" (kc/s) and "megacycles per second" (Mc/s), and occasionally "kilomegacycles per second" (kMc/s). The term "cycles per second" was largely replaced by "hertz" by
2597-577: Was appointed station director. The station began to air some Italian language programming. In 1936, the station was sold to Gene T. Dyer and its studios were moved to the Guyon Paradise Ballroom in Chicago. It became a commercial operation, and aired religious, ethnic, and music programming. On April 2, 1937, the station's transmitter and the Christian Catholic Apostolic Church's Shiloh Tabernacle were destroyed in
2650-529: Was changed to WAIT on September 15, 1941. In 1947, the station began sharing time with a new WCBD, owned by the Christian Catholic Church in Zion, Illinois, which operated on Sundays only. In 1959, WAIT's owners purchased WCBD for $ 132,000, and WAIT was granted full daytime operations on the frequency. Daddy-O Daylie began his radio career on WAIT in 1948, hosting a jazz program. Daylie remained on
2703-414: Was delivered by satellite from Transtar Radio Networks ' "Format 41" service. In April 1988, its call sign was changed to WXEZ, standing for "Extra Easy", and it became a simulcast of WXEZ-FM , airing easy listening music. In 1989, it shifted back to a soft AC format, playing more vocals and fewer instrumentals. On November 16, 1990, the station's call sign was changed to WPNT, and it briefly aired
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#17330859205222756-584: Was increased to 5,000 watts. From April 1924 until November 11, 1928, WCBD shared time on its frequency with WLS . In November 1928, its frequency was changed to 1080 kHz, where it shared time with WMBI . Both WCBD and WMBI were restricted to daytime operations to protect WBT in Charlotte, North Carolina . In 1934, WCBD's studios were moved to the Karcher Hotel in Waukegan, Illinois , and Gene T. Dyer
2809-408: Was simulcast on WCFJ. In 2024, Newsweb transferred WSBC and WCPT to Heartland Signal for $ 1. Hertz The hertz (symbol: Hz ) is the unit of frequency in the International System of Units (SI), often described as being equivalent to one event (or cycle ) per second . The hertz is an SI derived unit whose formal expression in terms of SI base units is s , meaning that one hertz
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