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List Of Australian AM Radio Stations
This is an incomplete list of AM broadcast (medium wave) radio transmitter stations in Australia, past and present. History See also main article History of broadcasting in Australia The amateur years In the 1920s transmission on the medium wave band was dominated by amateurs who after qualifying by means of an examination and displaying proficiency in Morse code communication (though the band was restricted to telephony), were issued with a call sign consisting of a number denoting for which State the licence was issued (2=NSW, 3=Vic; 4=Qld; 5=SA and NT; 6=WA; 7=Tas) and a two-letter suffix of their own choosing. A licence fee was paid to the Postmaster General's Department, renewable every five years. Amateurs generally designed and built their own equipment. One such amateur was Tom Elliot, who in 1921 established station 4CM for its owner Dr. McDowall. This would be part of the impetus behind the Queensland Government establishing 4QG, Australia's first Government-owned s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Astor Mickey
Astor may refer to: People * Astor (surname) * Astor family, a wealthy 18th-century American family who became prominent in 20th-century British politics * Astor Bennett, a character in the Showtime television series ''Dexter'' * Ástor Piazzolla, a tango musician Places * Astore (other), also spelt ''Astor'', several places in northern Pakistan * Astor, Florida, United States * Astor, Kansas, United States * Astor, West Virginia, United States * The Astor Theatre, a picture theatre located in St Kilda, Victoria, Australia Buildings and locations * Astor Court, located in The Metropolitan Museum of Art in New York City, is a re-creation of a Ming Dynasty-style, Chinese-garden courtyard. * Astor Court Building, an apartment building on the Upper West Side of Manhattan, built in 1916. * Astor Place (Manhattan), a place leading to Broadway in New York City * Astor Row, the name given to 130th Street between Fifth Avenue and Lenox in Harlem Other uses * Astor Pictures, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Truth (Sydney Newspaper)
''Truth'' was a newspaper published in Sydney, Australia. It was founded in August 1890 by William Nicholas Willis and its first editor was Adolphus Taylor. In 1891 it claimed to be "The organ of radical democracy and Australian National Independence" and advocated "a republican Commonwealth created by the will of the whole people", but from its early days it was mainly a scandal sheet. Subsequent owners included Adolphus Taylor, Paddy Crick and John Norton. Norton established several subsidiaries, including the ''Sportsman'' (1900), the ''Brisbane Truth'' (1900), the Melbourne ''Truth'' (1902) and the Perth ''Truth'' (1903 to 1931), and an Adelaide ''Truth'' (1916-1964)''.'' Ezra Norton Although John Norton disinherited his estranged wife, Ada Norton and his son Ezra Norton at his death in 1916 (with the bulk of his estate going to his daughter, Joan), Mrs Norton persuaded the New South Wales Parliament to backdate the new ''Testator's Family Maintenance Act'' to take eff ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wavelength
In physics, the wavelength is the spatial period of a periodic wave—the distance over which the wave's shape repeats. It is the distance between consecutive corresponding points of the same phase on the wave, such as two adjacent crests, troughs, or zero crossings, and is a characteristic of both traveling waves and standing waves, as well as other spatial wave patterns. The inverse of the wavelength is called the spatial frequency. Wavelength is commonly designated by the Greek letter ''lambda'' (λ). The term ''wavelength'' is also sometimes applied to modulated waves, and to the sinusoidal envelopes of modulated waves or waves formed by interference of several sinusoids. Assuming a sinusoidal wave moving at a fixed wave speed, wavelength is inversely proportional to frequency of the wave: waves with higher frequencies have shorter wavelengths, and lower frequencies have longer wavelengths. Wavelength depends on the medium (for example, vacuum, air, or water) that a wav ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
C-QUAM
C-QUAM (Compatible QUadrature Amplitude Modulation) is the method of AM stereo broadcasting used in Canada, the United States and most other countries. It was invented in 1977 by Norman Parker, Francis Hilbert, and Yoshio Sakaie, and published in an IEEE journal. Using circuitry developed by Motorola, C-QUAM uses quadrature amplitude modulation (QAM) to encode the stereo separation signal. This extra signal is then stripped down in such a way that it is compatible with the envelope detector of older receivers, hence the name C-QUAM for Compatible. A 25 Hz pilot tone is added to trigger receivers; unlike its counterpart in FM radio, this carrier is not necessary for the reconstruction of the original audio sources. Description The C-QUAM signal is composed of two distinct modulation stages: a conventional AM version and a compatible quadrature PM version. Stage 1 provides the transmitter with a summed L+R mono audio input. This input is precisely the same as conventional AM ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tandy AM Stereo
Tandy may refer to: Companies * Tandy Corporation, a leather supply company which became the RadioShack Corporation in 2000 ** Tandy Computers *** Tandy Color Computer, released in 1980 *** Tandy 2000, a computer released in 1983 *** Tandy 1000, a computer released in 1984 ** InterTAN, the now-defunct subsidiary for Tandy's European and Canadian outlets ** Tandy Electronics, former Australian subsidiary Other uses * Tandy, a robot and recurring character in ''Sam & Cat'' * "Tandy", a short story by Sherwood Anderson, part of ''Winesburg, Ohio'' * Tandy Stark, a character played by Tandy Tatter in the British web series '' Corner Shop Show'' * Tandy Warnow, American computer scientist * Tandy (surname), list of notable people with the surname * Tandy Hampton, a fictional character on the U.S. TV series ''Nashville'' * Phil Tandy Miller, fictional character on the U.S. TV series ''The Last Man on Earth'' See also * Tandi (other) Tandi is a city in Chitwan District, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Standard Telephones And Cables
Standard Telephones and Cables Ltd (later STC plc) was a British manufacturer of telephone, telegraph, radio, telecommunications, and related equipment. During its history, STC invented and developed several groundbreaking new technologies including pulse-code modulation (PCM) and optical fibres. The company was founded in 1883 in London as International Western Electric by the Western Electric Company, shortly after Western Electric became the telephone equipment supplier for the American Telephone and Telegraph Company (AT&T) in the United States. In 1925, Western Electric divested itself of all foreign operations and sold International Western Electric to International Telephone and Telegraph (ITT), in part to thwart antitrust actions by the American government. In mid-1982, STC became an independent company and was listed on the London Stock Exchange; for a time it was a constituent of the FTSE 100 Index. It was bought by Nortel in 1991. History Early days The company was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amalgamated Wireless (Australasia)
AWA Technology Services, name based on former name Amalgamated Wireless (Australasia) Ltd, is an Australian provider for technology related services. Throughout most of the 20th century AWA was Australia's largest and most prominent electronics organisation, undertaking development, manufacture and distribution of radio, telecommunications, television and audio equipment as well as broadcasting services. After the sell-off of most of its assets and operating divisions, AWA is now primarily an information and communications technology (ICT) services company. History Pre-World War II The company commenced operations in 1909 as Australasian Wireless Limited (AWL), a Telefunken wireless agent. The first chairman was Hugh Denison. Ernest Fisk, a foundation director, was general and technical manager. In 1916 he became managing director and in 1932 chairman. The Marconi Company sued the Australian government in 1912, for infringing their patent (and AWL issued writs against firms ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Australasian
The ''Australasian Post'', commonly called the ''Aussie Post'', was Australia's longest-running weekly picture magazine. History and profile Its origins are traceable to Saturday, 3 January 1857, when the first issue of ''Bell's Life in Victoria and Sporting Chronicle'' (probably best known for Tom Wills's famous 1858 Australian rules football letter) was released. The weekly, which was produced by Charles Frederic Somerton in Melbourne, was one of several Bell's Life publications based on the format of ''Bell's Life in London'', a Sydney version having been published since 1845. On 1 October 1864, the weekly newspaper ''The Australasian'' was launched in Melbourne, Victoria by the proprietors of ''The Argus (Melbourne), The Argus''. It supplanted three unprofitable ''Argus'' publications: ''The Weekly Argus'', ''The Examiner (Melbourne), The Examiner'', and ''The Yeoman'', and contained features of all three. A competitor, ''The Age'', gloated that as it was printed on coarse h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Australian Broadcasting Company
The Australian Broadcasting Company Pty. Ltd. was a company founded in Melbourne in 1924 with a capital of £A 100,000 by a consortium of entertainment interests, notably Farmer & Company, J. C. Williamson Limited and J. & N. Tait to found and operate commercial radio broadcasting stations. Other major shareholders, perhaps later entrants, were Union Theatres Limited, B & J. Fuller and J. Albert & Son. Directors were Stuart Doyle, Frank Albert and Sir Benjamin Fuller. The Company was set up in Sydney by Sir Benjamin Fuller and Frank Albert. Licensing In 1929 the company won the contract to supply radio programmes for broadcast on the "A-class" transmitters contracted to the Federal Government's National Broadcasting Service. The Royal Commission of 1927 had recommended full nationalisation in the style of the BBC, but the conservative government of the time chose this out-sourced approach instead. As each of the "A-class" licences expired during 1929 and 1930, the Com ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Queenslander
''The Queenslander'' was the weekly summary and literary edition of the '' Brisbane Courier'', the leading journal in the colony—and later, federal state—of Queensland since the 1850s. ''The Queenslander'' was launched by the Brisbane Newspaper Company in 1866, and discontinued in 1939. History ''The Queenslander'' was first published on 3 February 1866 in Brisbane by Thomas Blacket Stephens. The last edition was printed on 22 February 1939. In a country the size of Australia, a daily newspaper of some prominence could only reach the bush and outlying districts if it also published a weekly edition. Yet ''The Queenslander'', under the managing editorship of Gresley Lukin—managing editor from November 1873 until December 1880—also came to find additional use as a literary magazine. In September 1919, a series of aerial photographs of Brisbane and its surrounding suburbs were published under the title, ''Brisbane By Air''. The photographs were taken by the newspaper' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of North American Broadcast Station Classes
This is a list of broadcast station classes applicable in much of North America under international agreements between the United States, Canada and Mexico. Effective radiated power (ERP) and height above average terrain (HAAT) are listed unless otherwise noted. All radio and television stations within of the US-Canada or US-Mexico border must get approval by both the domestic and foreign agency. These agencies are Industry Canada/Canadian Radio-television and Telecommunications Commission (CRTC) in Canada, the Federal Communications Commission (FCC) in the US, and the Federal Telecommunications Institute (IFT) in Mexico. AM Station class descriptions All domestic (United States) AM stations are classified as A, B, C, or D. * A (formerly I) — clear-channel stations — 10 kW to 50 kW, 24 hours. **Class A stations are only protected within a radius of the transmitter site. **The old Class I was divided into three: Class I-A, I-B and I-N. NARBA distinguishe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Power Amplifier Classes
In electronics, power amplifier classes are letter symbols applied to different power amplifier types. The class gives a broad indication of an amplifier's characteristics and performance. The classes are related to the time period that the active amplifier device is passing current, expressed as a fraction of the period of a signal waveform applied to the input. A class A amplifier is conducting through all the period of the signal; Class B only for one-half the input period, class C for much less than half the input period. A Class D amplifier operates its output device in a switching manner; the fraction of the time that the device is conducting is adjusted so a pulse-width modulation output is obtained from the stage. Additional letter classes are defined for special-purpose amplifiers, with additional active elements or particular power supply improvements; sometimes a new letter symbol is used by a manufacturer to promote its proprietary design. Power amplifier classes Powe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
