The Bamboo Blonde is a 1946 American romantic comedy directed by Anthony Mann based on an original story "Chicago Lulu" by Wayne Whittaker. A low budget production, it stars singer Frances Langford in the title role, Ralph Edwards – from TV's This Is Your Life – and Russell Wade , usually a bit player. As an RKO star, Langford was famous for her role in entertaining the troops in World War II, and the film features a number of songs that her character sings at a nightclub and war bond rallies across the nation.
83-492: A reporter is interviewing businessman Eddie Clark ( Ralph Edwards ) on the backstory behind his conglomerate of companies branded the alluring "Bamboo Blonde". During World War II, young Captain Patrick Ransom, Jr. ( Russell Wade ), an experienced private recreational pilot, has just been commissioned and given command of a B-29 , bomber. Seeking to meet up with his veteran aircrew for the first time before shipping out together
166-471: A directional antenna transmits radio waves in a beam in a particular direction, or receives waves from only one direction. Radio waves travel at the speed of light in vacuum and at slightly lower velocity in air. The other types of electromagnetic waves besides radio waves, infrared , visible light , ultraviolet , X-rays and gamma rays , can also carry information and be used for communication. The wide use of radio waves for telecommunication
249-418: A microphone , a video signal representing moving images from a video camera , or a digital signal consisting of a sequence of bits representing binary data from a computer. The modulation signal is applied to a radio transmitter . In the transmitter, an electronic oscillator generates an alternating current oscillating at a radio frequency , called the carrier wave because it serves to generate
332-492: A radar screen . Doppler radar can measure a moving object's velocity, by measuring the change in frequency of the return radio waves due to the Doppler effect . Radar sets mainly use high frequencies in the microwave bands, because these frequencies create strong reflections from objects the size of vehicles and can be focused into narrow beams with compact antennas. Parabolic (dish) antennas are widely used. In most radars
415-632: A transmitter connected to an antenna which radiates oscillating electrical energy, often characterized as a wave . They can be received by other antennas connected to a radio receiver ; this is the fundamental principle of radio communication. In addition to communication, radio is used for radar , radio navigation , remote control , remote sensing , and other applications. In radio communication , used in radio and television broadcasting , cell phones, two-way radios , wireless networking , and satellite communication , among numerous other uses, radio waves are used to carry information across space from
498-474: A " push to talk " button on their radio which switches off the receiver and switches on the transmitter. Or the radio link may be full duplex , a bidirectional link using two radio channels so both people can talk at the same time, as in a cell phone. One way, unidirectional radio transmission is called simplex . This is radio communication between a spacecraft and an Earth-based ground station, or another spacecraft. Communication with spacecraft involves
581-606: A Service Regulation specifying that "Radiotelegrams shall show in the preamble that the service is 'Radio ' ". The switch to radio in place of wireless took place slowly and unevenly in the English-speaking world. Lee de Forest helped popularize the new word in the United States—in early 1907, he founded the DeForest Radio Telephone Company, and his letter in the 22 June 1907 Electrical World about
664-708: A comic-book story published in the DC Comics "Superman's Girl Friend, Lois Lane" (#9, May 1959), Ralph Edwards surprised Lois when she was the subject of This Is Your Life . He also appeared in a McGruff the Crime Dog PSA where McGruff himself was the subject, featuring clips from past PSAs. Edwards produced dozens of game shows, including About Faces , Knockout , Place the Face , It Could Be You , Name That Tune (1970s version) and The Cross-Wits . In 1981, with Stu Billett, he executive-produced The People's Court ,
747-412: A controller device control the actions of a remote device. The existence of radio waves was first proven by German physicist Heinrich Hertz on 11 November 1886. In the mid-1890s, building on techniques physicists were using to study electromagnetic waves, Italian physicist Guglielmo Marconi developed the first apparatus for long-distance radio communication, sending a wireless Morse Code message to
830-586: A director, is better known for later working with James Stewart on many films (primarily Westerns), as well as for making epics in his later career. This early film is typical of a period when Mann accepted any and all assignments in a variety of genres. Songs in the film were all written by Mort Greene and Lew Pollack , and sung by Frances Langford. Scenes from The Bamboo Blonde later appeared in an excerpted form in Make Mine Laughs (1949), starring Joan Davis , Dennis Day and Ray Bolger . The new picture
913-483: A few films, including Radio Stars On Parade with the comedy team of Wally Brown and Alan Carney , and I'll Cry Tomorrow with Susan Hayward . After years of experimental broadcasts, the Federal Communications Commission approved commercial television broadcasts starting on July 1, 1941, and NBC's New York station WNBT (now WNBC) was the first to make the changeover, with Edwards hosting
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#1732872121722996-473: A full-time job for the Columbia Broadcasting System on the original WABC (now WCBS ), where he worked with two other young announcers who would become broadcasting fixtures - Mel Allen and Andre Baruch . The young director had an assured, professional manner, and in a few years he was well established as a nationally famous announcer. It was Edwards who introduced Major Bowes every week on
1079-421: A given bandwidth than analog modulation , by using data compression algorithms, which reduce redundancy in the data to be sent, and more efficient modulation. Other reasons for the transition is that digital modulation has greater noise immunity than analog, digital signal processing chips have more power and flexibility than analog circuits, and a wide variety of types of information can be transmitted using
1162-545: A government license, such as the general radiotelephone operator license in the US, obtained by taking a test demonstrating adequate technical and legal knowledge of safe radio operation. Exceptions to the above rules allow the unlicensed operation by the public of low power short-range transmitters in consumer products such as cell phones, cordless phones , wireless devices , walkie-talkies , citizens band radios , wireless microphones , garage door openers , and baby monitors . In
1245-572: A large economic cost, but it can also be life-threatening (for example, in the case of interference with emergency communications or air traffic control ). To prevent interference between different users, the emission of radio waves is strictly regulated by national laws, coordinated by an international body, the International Telecommunication Union (ITU), which allocates bands in the radio spectrum for different uses. Radio transmitters must be licensed by governments, under
1328-595: A metal conductor called an antenna . As they travel farther from the transmitting antenna, radio waves spread out so their signal strength ( intensity in watts per square meter) decreases (see Inverse-square law ), so radio transmissions can only be received within a limited range of the transmitter, the distance depending on the transmitter power, the antenna radiation pattern , receiver sensitivity, background noise level, and presence of obstructions between transmitter and receiver . An omnidirectional antenna transmits or receives radio waves in all directions, while
1411-427: A more limited information-carrying capacity and so work best with audio signals (speech and music), and the sound quality can be degraded by radio noise from natural and artificial sources. The shortwave bands have a greater potential range but are more subject to interference by distant stations and varying atmospheric conditions that affect reception. In the very high frequency band, greater than 30 megahertz,
1494-411: A national war bond drive. Clark immediately dreams up ways to exploit his singer's connection to the famous bomber. While all of America assumes the couple has been reunited stateside, things are actually pretty touch-and-go with the couple, as each is coming from a different place and struggling to find their way. Their magnetic attraction to one-another merely complicates things at every turn. With
1577-507: A notable acting role, his character a jovial and decreasingly skeptical radio dj, in the episode of the CBS Radio series Suspense "Ghost Hunt" (based on H. Russell Wakefield 's story from the 25th anniversary issue of Weird Tales ) in 1949. Edwards furthered the career of another game show host, his protégé Bob Barker . The 1940s-1950s TV version of Truth or Consequences had featured Edwards, Jack Bailey , and Steve Dunne . When
1660-495: A one-time episode of Truth or Consequences over WNBT to commemorate the first day of commercial telecasting. The show was originally based in New York, with Mel Allen as announcer, but later moved to Los Angeles. After the U.S. entered World War II in late 1941, causing early television broadcasts to be cut back dramatically, its radio run started on CBS (home network to both Edwards and Allen), then moved to NBC . Edwards and
1743-470: A primitive spark-gap transmitter . Experiments by Hertz and physicists Jagadish Chandra Bose , Oliver Lodge , Lord Rayleigh , and Augusto Righi , among others, showed that radio waves like light demonstrated reflection, refraction , diffraction , polarization , standing waves , and traveled at the same speed as light, confirming that both light and radio waves were electromagnetic waves, differing only in frequency. In 1895, Guglielmo Marconi developed
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#17328721217221826-420: A public audience. Analog audio is the earliest form of radio broadcast. AM broadcasting began around 1920. FM broadcasting was introduced in the late 1930s with improved fidelity . A broadcast radio receiver is called a radio . Most radios can receive both AM and FM. Television broadcasting is the transmission of moving images by radio, which consist of sequences of still images, which are displayed on
1909-459: A radio signal is usually concentrated in narrow frequency bands called sidebands ( SB ) just above and below the carrier frequency. The width in hertz of the frequency range that the radio signal occupies, the highest frequency minus the lowest frequency, is called its bandwidth ( BW ). For any given signal-to-noise ratio , an amount of bandwidth can carry the same amount of information ( data rate in bits per second) regardless of where in
1992-489: A receiver that is typically colocated with the transmitter. In radio navigation systems such as GPS and VOR , a mobile navigation instrument receives radio signals from multiple navigational radio beacons whose position is known, and by precisely measuring the arrival time of the radio waves the receiver can calculate its position on Earth. In wireless radio remote control devices like drones , garage door openers , and keyless entry systems , radio signals transmitted from
2075-521: A recipient over a kilometer away in 1895, and the first transatlantic signal on 12 December 1901. The first commercial radio broadcast was transmitted on 2 November 1920, when the live returns of the Harding-Cox presidential election were broadcast by Westinghouse Electric and Manufacturing Company in Pittsburgh, under the call sign KDKA . The emission of radio waves is regulated by law, coordinated by
2158-644: A reference to the radiotelegraph and radiotelegraphy . The use of radio as a standalone word dates back to at least 30 December 1904, when instructions issued by the British Post Office for transmitting telegrams specified that "The word 'Radio'... is sent in the Service Instructions." This practice was universally adopted, and the word "radio" introduced internationally, by the 1906 Berlin Radiotelegraphic Convention, which included
2241-554: A revival of The Price Is Right on CBS from 1972 to 2007 ( Drew Carey has been the host since 2007). As a result, thanks to Edwards's "be yourself" admonition, Barker became as familiar with a generation of Truth or Consequences and Price Is Right viewers, as earlier fans had with Edwards and original Price Is Right host Bill Cullen during the original versions of the shows in the 1950s and 1960s. Edwards died of heart failure on November 16, 2005, in Los Angeles, California at
2324-582: A risque image of the singer on the nose of their bomber . At first, both embarrassed and put off, Captain Ransom relents and allows what becomes dubbed "the Bamboo Blonde" to stay. The plane and crew go on to become famous, without Ransom ever letting on that the blonde bombshell is not "his girl". Seeking to capitalize on their fame, the Air Corps decides to bring the "Bamboo Blonde" and its crew back home to front
2407-446: A screen on a television receiver (a "television" or TV) along with a synchronized audio (sound) channel. Television ( video ) signals occupy a wider bandwidth than broadcast radio ( audio ) signals. Analog television , the original television technology, required 6 MHz, so the television frequency bands are divided into 6 MHz channels, now called "RF channels". The current television standard, introduced beginning in 2006,
2490-441: A smaller bandwidth than the old analog channels, saving scarce radio spectrum space. Therefore, each of the 6 MHz analog RF channels now carries up to 7 DTV channels – these are called "virtual channels". Digital television receivers have different behavior in the presence of poor reception or noise than analog television, called the " digital cliff " effect. Unlike analog television, in which increasingly poor reception causes
2573-416: A television (video) signal has a greater data rate than an audio signal . The radio spectrum , the total range of radio frequencies that can be used for communication in a given area, is a limited resource. Each radio transmission occupies a portion of the total bandwidth available. Radio bandwidth is regarded as an economic good which has a monetary cost and is in increasing demand. In some parts of
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2656-400: A transmitter to a receiver, by modulating the radio signal (impressing an information signal on the radio wave by varying some aspect of the wave) in the transmitter. In radar, used to locate and track objects like aircraft, ships, spacecraft and missiles, a beam of radio waves emitted by a radar transmitter reflects off the target object, and the reflected waves reveal the object's location to
2739-652: A transmitter to control the actions of a device at a remote location. Remote control systems may also include telemetry channels in the other direction, used to transmit real-time information on the state of the device back to the control station. Uncrewed spacecraft are an example of remote-controlled machines, controlled by commands transmitted by satellite ground stations . Most handheld remote controls used to control consumer electronics products like televisions or DVD players actually operate by infrared light rather than radio waves, so are not examples of radio remote control. A security concern with remote control systems
2822-435: A variety of license classes depending on use, and are restricted to certain frequencies and power levels. In some classes, such as radio and television broadcasting stations, the transmitter is given a unique identifier consisting of a string of letters and numbers called a call sign , which must be used in all transmissions. In order to adjust, maintain, or internally repair radiotelephone transmitters, individuals must hold
2905-413: Is amplified in the transmitter and applied to a transmitting antenna which radiates the energy as radio waves. The radio waves carry the information to the receiver location. At the receiver, the radio wave induces a tiny oscillating voltage in the receiving antenna which is a weaker replica of the current in the transmitting antenna. This voltage is applied to the radio receiver , which amplifies
2988-703: Is spoofing , in which an unauthorized person transmits an imitation of the control signal to take control of the device. Examples of radio remote control: Radio jamming is the deliberate radiation of radio signals designed to interfere with the reception of other radio signals. Jamming devices are called "signal suppressors" or "interference generators" or just jammers. During wartime, militaries use jamming to interfere with enemies' tactical radio communication. Since radio waves can pass beyond national borders, some totalitarian countries which practice censorship use jamming to prevent their citizens from listening to broadcasts from radio stations in other countries. Jamming
3071-445: Is a digital format called high-definition television (HDTV), which transmits pictures at higher resolution, typically 1080 pixels high by 1920 pixels wide, at a rate of 25 or 30 frames per second. Digital television (DTV) transmission systems, which replaced older analog television in a transition beginning in 2006, use image compression and high-efficiency digital modulation such as OFDM and 8VSB to transmit HDTV video within
3154-433: Is an audio transceiver , a receiver and transmitter in the same device, used for bidirectional person-to-person voice communication with other users with similar radios. An older term for this mode of communication is radiotelephony . The radio link may be half-duplex , as in a walkie-talkie , using a single radio channel in which only one radio can transmit at a time, so different users take turns talking, pressing
3237-478: Is apprehended by M.P.s, Ransom sees beautiful blonde singer Louise Anderson ( Frances Langford ). Overwhelmed, he impetuously falls in love her. When he later passionately kisses the curvy torch singer goodbye his crew mistakenly imagines he's a playboy and dubs him the Air Corps' greatest wolf . Out in the Pacific, Ransom's plane and crew run into a prolonged stretch of bad luck. Trying to shake it, one of them paints
3320-410: Is called "tuning". The oscillating radio signal from the desired station causes the tuned circuit to resonate , oscillate in sympathy, and it passes the signal on to the rest of the receiver. Radio signals at other frequencies are blocked by the tuned circuit and not passed on. A modulated radio wave, carrying an information signal, occupies a range of frequencies . The information ( modulation ) in
3403-427: Is called an uplink , while a link that transmits data from the spacecraft to the ground is called a downlink. Radar is a radiolocation method used to locate and track aircraft, spacecraft, missiles, ships, vehicles, and also to map weather patterns and terrain. A radar set consists of a transmitter and receiver. The transmitter emits a narrow beam of radio waves which is swept around the surrounding space. When
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3486-553: Is in radio clocks and watches, which include an automated receiver that periodically (usually weekly) receives and decodes the time signal and resets the watch's internal quartz clock to the correct time, thus allowing a small watch or desk clock to have the same accuracy as an atomic clock. Government time stations are declining in number because GPS satellites and the Internet Network Time Protocol (NTP) provide equally accurate time standards. A two-way radio
3569-507: Is just a lark on his part, and determined to ruin any possibility of a match together, she gives her full vampy nightclub performance to the stuffy old money crowd. In spite of a surprisingly enthusiastic reception – certainly by the men in the crowd, young and old alike – she flees to the airport to put as many miles as she can between her and her nonplussed beau. When all commercial flights are grounded due to fog, she relents when Ransom offers to fly her instead. Deceiving her, he lands on
3652-417: Is mainly due to their desirable propagation properties stemming from their longer wavelength. In radio communication systems, information is carried across space using radio waves. At the sending end, the information to be sent is converted by some type of transducer to a time-varying electrical signal called the modulation signal. The modulation signal may be an audio signal representing sound from
3735-524: Is the one-way transmission of information from a transmitter to receivers belonging to a public audience. Since the radio waves become weaker with distance, a broadcasting station can only be received within a limited distance of its transmitter. Systems that broadcast from satellites can generally be received over an entire country or continent. Older terrestrial radio and television are paid for by commercial advertising or governments. In subscription systems like satellite television and satellite radio
3818-578: The Original Amateur Hour and Fred Allen on Town Hall Tonight . Edwards perfected a chuckling delivery, sounding as though he was in the midst of telling a very funny story. This "laugh in the voice" technique served him well when 20th Century Fox hired him to narrate the coming-attractions trailers for Laurel and Hardy movies. Edwards was the second host of the NBC radio children's talent show The Horn and Hardart Children's Hour . He appeared in
3901-657: The Hollywood Walk of Fame located at 6116 Hollywood Boulevard (radio) and 6262 Hollywood Boulevard (television). Both were dedicated February 8, 1960. Edwards was inducted into the National Radio Hall of Fame in 1995. 5. http://www.legacy.com/NS/Obituary.aspx?pid=15684060 Radio Radio is the technology of communicating using radio waves . Radio waves are electromagnetic waves of frequency between 3 hertz (Hz) and 300 gigahertz (GHz). They are generated by an electronic device called
3984-591: The International Telecommunication Union (ITU), which allocates frequency bands in the radio spectrum for various uses. The word radio is derived from the Latin word radius , meaning "spoke of a wheel, beam of light, ray". It was first applied to communications in 1881 when, at the suggestion of French scientist Ernest Mercadier [ fr ] , Alexander Graham Bell adopted radiophone (meaning "radiated sound") as an alternate name for his photophone optical transmission system. Following Hertz's discovery of
4067-513: The Truth or Consequences radio show were featured in a Superman story in Action Comics #127 (December 1948). In 1948 Edwards created, produced, and hosted This Is Your Life on NBC Radio, moving to NBC-TV in 1952–1961. Each week Edwards would surprise some unsuspecting person (usually a celebrity, sometimes an ordinary citizen) and review the subject's personal and professional life in front of
4150-497: The ionosphere without refraction , and at microwave frequencies the high-gain antennas needed to focus the radio energy into a narrow beam pointed at the receiver are small and take up a minimum of space in a satellite. Portions of the UHF , L , C , S , k u and k a band are allocated for space communication. A radio link that transmits data from the Earth's surface to a spacecraft
4233-400: The radio spectrum into 12 bands, each beginning at a wavelength which is a power of ten (10 ) metres, with corresponding frequency of 3 times a power of ten, and each covering a decade of frequency or wavelength. Each of these bands has a traditional name: It can be seen that the bandwidth , the range of frequencies, contained in each band is not equal but increases exponentially as
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#17328721217224316-531: The 1920s with the introduction of broadcasting. Electromagnetic waves were predicted by James Clerk Maxwell in his 1873 theory of electromagnetism , now called Maxwell's equations , who proposed that a coupled oscillating electric field and magnetic field could travel through space as a wave, and proposed that light consisted of electromagnetic waves of short wavelength . On 11 November 1886, German physicist Heinrich Hertz , attempting to confirm Maxwell's theory, first observed radio waves he generated using
4399-474: The Earth's atmosphere has less of an effect on the range of signals, and line-of-sight propagation becomes the principal mode. These higher frequencies permit the great bandwidth required for television broadcasting. Since natural and artificial noise sources are less present at these frequencies, high-quality audio transmission is possible, using frequency modulation . Radio broadcasting means transmission of audio (sound) to radio receivers belonging to
4482-522: The TV audience, often introducing figures from their past as live guests. The show drew great interest from viewers, partly because the identity of the subject wasn't revealed until the show went live. Throughout the half-hour Edwards would guide the narrative of the show, ushering visitors on and off stage, and eventually prompting the honoree to recall a personal turning point. Edwards was showman enough to draw upon his Truth or Consequences experience, emphasizing
4565-505: The US, these fall under Part 15 of the Federal Communications Commission (FCC) regulations. Many of these devices use the ISM bands , a series of frequency bands throughout the radio spectrum reserved for unlicensed use. Although they can be operated without a license, like all radio equipment these devices generally must be type-approved before the sale. Below are some of the most important uses of radio, organized by function. Broadcasting
4648-528: The age of 92. Shortly before his death he released a selection of his This Is Your Life programs on DVD . The Game Show Congress annually presents the Ralph Edwards Service Award, for those within the game show community who have worked tirelessly for charitable causes. In 2004, Edwards' son accepted the first of these awards on behalf of his father. For his contribution to the radio and television industries, Ralph Edwards has two stars on
4731-405: The air simultaneously without interfering with each other because each transmitter's radio waves oscillate at a different rate, in other words, each transmitter has a different frequency , measured in hertz (Hz), kilohertz (kHz), megahertz (MHz) or gigahertz (GHz). The receiving antenna typically picks up the radio signals of many transmitters. The receiver uses tuned circuits to select
4814-414: The beam strikes a target object, radio waves are reflected back to the receiver. The direction of the beam reveals the object's location. Since radio waves travel at a constant speed close to the speed of light , by measuring the brief time delay between the outgoing pulse and the received "echo", the range to the target can be calculated. The targets are often displayed graphically on a map display called
4897-668: The continuous waves which were needed for audio modulation , so radio was used for person-to-person commercial, diplomatic and military text messaging. Starting around 1908 industrial countries built worldwide networks of powerful transoceanic transmitters to exchange telegram traffic between continents and communicate with their colonies and naval fleets. During World War I the development of continuous wave radio transmitters, rectifying electrolytic, and crystal radio receiver detectors enabled amplitude modulation (AM) radiotelephony to be achieved by Reginald Fessenden and others, allowing audio to be transmitted. On 2 November 1920,
4980-466: The customer pays a monthly fee. In these systems, the radio signal is encrypted and can only be decrypted by the receiver, which is controlled by the company and can be deactivated if the customer does not pay. Broadcasting uses several parts of the radio spectrum, depending on the type of signals transmitted and the desired target audience. Longwave and medium wave signals can give reliable coverage of areas several hundred kilometers across, but have
5063-570: The existence of radio waves in 1886, the term Hertzian waves was initially used for this radiation. The first practical radio communication systems, developed by Marconi in 1894–1895, transmitted telegraph signals by radio waves, so radio communication was first called wireless telegraphy . Up until about 1910 the term wireless telegraphy also included a variety of other experimental systems for transmitting telegraph signals without wires, including electrostatic induction , electromagnetic induction and aquatic and earth conduction , so there
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#17328721217225146-413: The first commercial radio broadcast was transmitted by Westinghouse Electric and Manufacturing Company in Pittsburgh, under the call sign KDKA featuring live coverage of the Harding-Cox presidential election . Radio waves are radiated by electric charges undergoing acceleration . They are generated artificially by time-varying electric currents , consisting of electrons flowing back and forth in
5229-409: The first program of its type. In 1996, along with Stu Billett, they also did Bzzz! . During the 1980s, he partnered with Stu Billett to run Ralph Edwards/Stu Billett Productions, of which in 1986, they wanted to expand it beyond game and court shows and hired Lorimar-Telepictures veteran Jay Feldman to serve as senior vice president, in order to go for specials and made-for-television features. He had
5312-580: The first radio communication system, using a spark-gap transmitter to send Morse code over long distances. By December 1901, he had transmitted across the Atlantic Ocean. Marconi and Karl Ferdinand Braun shared the 1909 Nobel Prize in Physics "for their contributions to the development of wireless telegraphy". During radio's first two decades, called the radiotelegraphy era, the primitive radio transmitters could only transmit pulses of radio waves, not
5395-615: The frequency increases; each band contains ten times the bandwidth of the preceding band. The term "tremendously low frequency" (TLF) has been used for wavelengths from 1–3 Hz (300,000–100,000 km), though the term has not been defined by the ITU. The airwaves are a resource shared by many users. Two radio transmitters in the same area that attempt to transmit on the same frequency will interfere with each other, causing garbled reception, so neither transmission may be received clearly. Interference with radio transmissions can not only have
5478-411: The grounds of the family estate, where Louise is warmly embraced by Ransom's open-armed parents. After some humbling miscues on Ransom's part, the lovebirds' future together is finally assured. In May 1943, RKO originally advertised that a countrywide series of contests would be used to find an "unknown" to portray The Bamboo Blonde in a future romantic comedy feature. Anthony Mann, on his 11th film as
5561-402: The longest transmission distances of any radio links, up to billions of kilometers for interplanetary spacecraft . In order to receive the weak signals from distant spacecraft, satellite ground stations use large parabolic "dish" antennas up to 25 metres (82 ft) in diameter and extremely sensitive receivers. High frequencies in the microwave band are used, since microwaves pass through
5644-466: The need for legal restrictions warned that "Radio chaos will certainly be the result until such stringent regulation is enforced." The United States Navy would also play a role. Although its translation of the 1906 Berlin Convention used the terms wireless telegraph and wireless telegram , by 1912 it began to promote the use of radio instead. The term started to become preferred by the general public in
5727-457: The next morning to the Pacific, he is first ditched by the unimpressed and wily bunch, which misdirects him to a declasse New York nightclub, then snubbed by his elitist fiancée, socialite Eileen Sawyer ( Jane Greer ), who refuses to accompany him there. Determined to meet up with his new aircrew, he persists on his own, only to cluelessly end up at a nightspot owned by Clark that is out-of-bounds to military personnel. Before he realizes this, or
5810-456: The pair finally back in New York for a big finale, Eileen schemes a way to break them up, under the guise of throwing a $ 100,000 a ticket bond rally gala. Only then does Louise discover that rather than being the shy "farmboy" he had presented himself as being (while seeking to downplay to both her and his crew that he was instead a scion to a substantial Pennsylvania fortune) he is of the same social set as Eileen. Convinced her romance with Ransom
5893-505: The picture quality to gradually degrade, in digital television picture quality is not affected by poor reception until, at a certain point, the receiver stops working and the screen goes black. Government standard frequency and time signal services operate time radio stations which continuously broadcast extremely accurate time signals produced by atomic clocks , as a reference to synchronize other clocks. Examples are BPC , DCF77 , JJY , MSF , RTZ , TDF , WWV , and YVTO . One use
5976-451: The radio frequency spectrum it is located, so bandwidth is a measure of information-carrying capacity . The bandwidth required by a radio transmission depends on the data rate of the information (modulation signal) being sent, and the spectral efficiency of the modulation method used; how much data it can transmit in each kilohertz of bandwidth. Different types of information signals carried by radio have different data rates. For example,
6059-409: The radio signal desired out of all the signals picked up by the antenna and reject the others. A tuned circuit (also called resonant circuit or tank circuit) acts like a resonator , similar to a tuning fork . It has a natural resonant frequency at which it oscillates. The resonant frequency of the receiver's tuned circuit is adjusted by the user to the frequency of the desired radio station; this
6142-451: The radio spectrum, the right to use a frequency band or even a single radio channel is bought and sold for millions of dollars. So there is an incentive to employ technology to minimize the bandwidth used by radio services. A slow transition from analog to digital radio transmission technologies began in the late 1990s. Part of the reason for this is that digital modulation can often transmit more information (a greater data rate) in
6225-456: The radio waves that carry the information through the air. The modulation signal is used to modulate the carrier, varying some aspect of the carrier wave, impressing the information in the modulation signal onto the carrier. Different radio systems use different modulation methods: Many other types of modulation are also used. In some types, a carrier wave is not transmitted but just one or both modulation sidebands . The modulated carrier
6308-481: The same digital modulation. Because it is a fixed resource which is in demand by an increasing number of users, the radio spectrum has become increasingly congested in recent decades, and the need to use it more effectively is driving many additional radio innovations such as trunked radio systems , spread spectrum (ultra-wideband) transmission, frequency reuse , dynamic spectrum management , frequency pooling, and cognitive radio . The ITU arbitrarily divides
6391-457: The sentimental elements that appealed to viewers and listeners at home. His on-air tributes would often recount some heroic sacrifice or tragic event, bringing the audience (and sometimes the subject) to the point of tears. Celebrity subjects included Marilyn Monroe , Stan Laurel and Oliver Hardy , Bob Hope , Andy Griffith , Buster Keaton , Barbara Eden , Bette Davis , Shirley Jones , Jayne Mansfield , Johnny Cash , and Carol Channing . In
6474-462: The show returned for another NBC run in late 1956, Edwards hired Barker, a popular West Coast radio personality, on December 21 after hearing his radio show on his car radio. During the 2001 Daytime Emmy Awards , Barker told backstage reporters that his lifelong friend Edwards told him to be no one else but himself. Barker would host Truth or Consequences on NBC until 1965, and later in daily syndication until 1975, by which time he had also taken over
6557-431: The transmitting antenna also serves as the receiving antenna; this is called a monostatic radar . A radar which uses separate transmitting and receiving antennas is called a bistatic radar . Radiolocation is a generic term covering a variety of techniques that use radio waves to find the location of objects, or for navigation. Radio remote control is the use of electronic control signals sent by radio waves from
6640-510: The weak radio signal so it is stronger, then demodulates it, extracting the original modulation signal from the modulated carrier wave. The modulation signal is converted by a transducer back to a human-usable form: an audio signal is converted to sound waves by a loudspeaker or earphones, a video signal is converted to images by a display , while a digital signal is applied to a computer or microprocessor, which interacts with human users. The radio waves from many transmitters pass through
6723-735: Was a filmed variety show, using old material from RKO and some new scenes. Mainly due to its connection with Mann, The Bamboo Blonde was screened at the "B Musicals Film Festival" in 2011 at Film Forum in Manhattan, New York City. Notes Bibliography Ralph Edwards Ralph Livingstone Edwards (June 13, 1913 – November 16, 2005) was an American radio and television host , radio producer , and television producer , best known for his radio-TV game shows Truth or Consequences and reality documentary series This Is Your Life . Edwards worked for KROW Radio in Oakland, California while he
6806-585: Was a need for a more precise term referring exclusively to electromagnetic radiation. The French physicist Édouard Branly , who in 1890 developed the radio wave detecting coherer , called it in French a radio-conducteur . The radio- prefix was later used to form additional descriptive compound and hyphenated words, especially in Europe. For example, in early 1898 the British publication The Practical Engineer included
6889-650: Was still in high school. After graduating from high school in 1931, he worked his way through college at the University of California, Berkeley , earning a B.A. in English in 1935. While there, he worked at every job from janitor to producer at Oakland's KTAB, now KSFO . Failing to get a job as a high school teacher, he worked at KFRC and then hitchhiked across the country to New York City , where, he said, "I ate ten-cent meals and slept on park benches". After some part-time announcing jobs, he got his big break in 1938 with
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