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Radio National
ABC Radio National, more commonly known as Radio National or simply RN, is an Australian nationwide public service radio network run by the Australian Broadcasting Corporation (ABC). From 1947 until 1985, the network was known as ABC Radio 2. History 1937: Predecessors and beginnings From 1928, the National Broadcasting Service, as part of the federal Postmaster-General's Department, gradually took over responsibility for all the existing stations that were sponsored by public licence fees ("A" Class licences). The outsourced Australian Broadcasting Company supplied programs from 1929. In 1932 a commission was established, merging the original ABC company and the National Broadcasting Service. It is from this time that Radio National dates as a distinct network within the ABC, in which a system of program relays was developed during the subsequent decades to link stations spread across the nation. The beginnings of Radio National lie with Sydney radio station 2FC, which air ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Australia
Australia, officially the Commonwealth of Australia, is a country comprising mainland Australia, the mainland of the Australia (continent), Australian continent, the island of Tasmania and list of islands of Australia, numerous smaller islands. It has a total area of , making it the list of countries and dependencies by area, sixth-largest country in the world and the largest in Oceania. Australia is the world's flattest and driest inhabited continent. It is a megadiverse countries, megadiverse country, and its size gives it a wide variety of landscapes and Climate of Australia, climates including deserts of Australia, deserts in the Outback, interior and forests of Australia, tropical rainforests along the Eastern states of Australia, coast. The ancestors of Aboriginal Australians began arriving from south-east Asia 50,000 to 65,000 years ago, during the Last Glacial Period, last glacial period. By the time of British settlement, Aboriginal Australians spoke 250 distinct l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sydney
Sydney is the capital city of the States and territories of Australia, state of New South Wales and the List of cities in Australia by population, most populous city in Australia. Located on Australia's east coast, the metropolis surrounds Sydney Harbour and extends about 80 km (50 mi) from the Pacific Ocean in the east to the Blue Mountains (New South Wales), Blue Mountains in the west, and about 80 km (50 mi) from Ku-ring-gai Chase National Park and the Hawkesbury River in the north and north-west, to the Royal National Park and Macarthur, New South Wales, Macarthur in the south and south-west. Greater Sydney consists of 658 suburbs, spread across 33 local government areas. Residents of the city are colloquially known as "Sydneysiders". The estimated population in June 2024 was 5,557,233, which is about 66% of the state's population. Estimated resident population, 30 June 2017. The city's nicknames include the Emerald City and the Harbour City. There is ev ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Class C Amplifier
In electronics, power amplifier classes are letter symbols applied to different power amplifier types. The class gives a broad indication of an amplifier's efficiency, linearity and other characteristics. Broadly, as you go up the alphabet, the amplifiers become more efficient but less linear, and the reduced linearity is dealt with through other means. The first classes, A, AB, B, and C, 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. This metric is known as conduction angle (\theta). A class-A amplifier is conducting through the entire period of the signal (\theta=360°); class-B only for one-half the input period (\theta=180°), class-C for much less than half the input period (\theta 180°); each one of the two active elements conducts more than half of the time. Class-AB is widely considered a good compromise for amplifiers, since many types of input signal are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Triode
A triode is an electronic amplifier, amplifying vacuum tube (or ''thermionic valve'' in British English) consisting of three electrodes inside an evacuated glass envelope: a heated Electrical filament, filament or cathode, a control grid, grid, and a Plate electrode, plate (anode). Developed from Lee De Forest's 1906 Audion, a partial vacuum tube that added a grid electrode to the thermionic diode (Fleming valve), the triode was the first practical electronic amplifier and the ancestor of other types of vacuum tubes such as the tetrode and pentode. Its invention helped make amplified radio technology and long-distance telephony possible. Triodes were widely used in consumer electronics devices such as radios and televisions until the 1970s, when transistors replaced them. Today, their main remaining use is in high-power Radio frequency, RF amplifiers in Transmitter, radio transmitters and industrial RF heating devices. In recent years there has been a resurgence in demand for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Standard Telephones And Cables
Standard Telephones and Cables Ltd (later STC public limited company, 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 Western Electric, the Western Electric Company, shortly after Western Electric became the telephone equipment supplier for AT&T, 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AWA Technology Services
AWA Technology Services, formerly named Amalgamated Wireless (Australasia) Ltd, is an Australian communications technology company. Throughout most of the twentieth 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 using M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Newcastle, New South Wales
Newcastle, also commonly referred to as Greater Newcastle ( ; ), is a large Metropolitan area, metropolitan area and the second-most-populous such area of New South Wales, Australia. It includes the cities of City of Newcastle, Newcastle and City of Lake Macquarie, Lake Macquarie and it is the hub of the List of suburbs in Greater Newcastle, New South Wales, Lower Hunter region, which includes most parts of the cities of City of Newcastle, Newcastle, City of Lake Macquarie, Lake Macquarie, City of Maitland, Maitland, City of Cessnock, Cessnock, and Port Stephens Council. Newcastle is also known by its colloquial nickname, Newy. A Newcastle resident can also be known as a Wiktionary, Novocastrian. Located at the mouth of the Hunter River (New South Wales), Hunter River, it is the predominant city within the Hunter Region. Famous for its Hunter Valley Coal Chain, coal, Newcastle is the largest coal exporting harbour in the world, exporting 143 million tonnes of coal in 2022. Beyon ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Canberra
Canberra ( ; ) is the capital city of Australia. Founded following the Federation of Australia, federation of the colonies of Australia as the seat of government for the new nation, it is Australia's list of cities in Australia, largest inland city, and the list of cities in Australia by population, eighth-largest Australian city by population. The city is located at the northern end of the Australian Capital Territory at the northern tip of the Australian Alps, the country's highest mountain range. Canberra's estimated population was 473,855. The area chosen for the capital had been inhabited by Aboriginal Australians for up to 21,000 years, by groups including the Ngunnawal and Ngambri. history of Australia (1788–1850), European settlement commenced in the first half of the 19th century, as evidenced by surviving landmarks such as St John the Baptist Church, Reid, St John's Anglican Church and Blundells Cottage. On 1 January 1901, federation of the colonies of Australi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Perth
Perth () is the list of Australian capital cities, capital city of Western Australia. It is the list of cities in Australia by population, fourth-most-populous city in Australia, with a population of over 2.3 million within Greater Perth . The Extremes on Earth#Other places considered the most remote, world's most isolated major city by certain criteria, Perth is part of the South West Land Division of Western Australia, with most of Perth metropolitan region, Perth's metropolitan area on the Swan Coastal Plain between the Indian Ocean and the Darling Scarp. The city has expanded outward from the original British settlements on the Swan River (Western Australia), Swan River, upon which its #Central business district, central business district and port of Fremantle are situated. Perth was founded by James Stirling (Royal Navy officer), Captain James Stirling in 1829 as the administrative centre of the Swan River Colony. The city is situated on the traditional lands of the Whadju ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brisbane
Brisbane ( ; ) is the List of Australian capital cities, capital and largest city of the States and territories of Australia, state of Queensland and the list of cities in Australia by population, third-most populous city in Australia, with a population of approximately 2.8 million. Brisbane lies at the centre of South East Queensland, an urban agglomeration with a population of over 4 million. The Brisbane central business district, central business district is situated within a peninsula of the Brisbane River about from its mouth at Moreton Bay. Brisbane's metropolitan area sprawls over the hilly floodplain of the Brisbane River Valley between Moreton Bay and the Taylor Range, Taylor and D'Aguilar Range, D'Aguilar mountain ranges, encompassing several local government in Australia, local government areas, most centrally the City of Brisbane. The demonym of Brisbane is ''Brisbanite''. The Moreton Bay penal settlement was founded in 1824 at Redcliffe, Queensland, Redcliff ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hobart
Hobart ( ) is the capital and most populous city of the island state of Tasmania, Australia. Located in Tasmania's south-east on the estuary of the River Derwent, it is the southernmost capital city in Australia. Despite containing nearly half of Tasmania's population, Hobart is the least-populated Australian state capital city, and second-smallest by population and area after Darwin if territories are taken into account. Material was copied from this source, which is available under Creative Commons Attribution 4.0 International License Its skyline is dominated by the kunanyi / Mount Wellington, and its harbour forms the second-deepest natural port in the world, with much of the city's waterfront consisting of reclaimed land. The metropolitan area is often referred to as Greater Hobart, to differentiate it from the City of Hobart, one of the seven local government areas that cover the city. It has a mild maritime climate. The city lies on country which was known by the l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Adelaide
Adelaide ( , ; ) is the list of Australian capital cities, capital and most populous city of South Australia, as well as the list of cities in Australia by population, fifth-most populous city in Australia. The name "Adelaide" may refer to either Greater Adelaide (including the Adelaide Hills) or the Adelaide city centre; the demonym ''Adelaidean'' is used to denote the city and the residents of Adelaide. The Native title in Australia#Traditional owner, traditional owners of the Adelaide region are the Kaurna, with the name referring to the area of the city centre and surrounding Adelaide Park Lands, Park Lands, in the Kaurna language. Adelaide is situated on the Adelaide Plains north of the Fleurieu Peninsula, between the Gulf St Vincent in the west and the Mount Lofty Ranges in the east. Its metropolitan area extends from the coast to the Adelaide Hills, foothills of the Mount Lofty Ranges, and stretches from Gawler in the north to Sellicks Beach in the south. Named in ho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
