List Of Am-band Radio Station Lists Issued By The United States Government – This is a non-exhaustive list of past and present AM (medium wave) radio stations in Australia.
In the 1920s, most broadcasts on medium-wave bands were voluntary, after which they were confirmed through study and demonstration of Morse code communication skills (although the band was limited to phones). By) They received a dialing signal by dialing a number. Which indicates that the license is granted (2 = NSW, 3 = Vic; 4 = Qld; 5 = SA and NT; 6 = WA; 7 = Tas) and two suffixes of their choice. Thousands of taxes are paid to the General Department of Posts, which can be repaid every five years. Volunteers designed and built their own equipment. One such non-professional was Tom Elliot, who founded the 4CM station in 1921 for Dr. MacDougall. This will be part of the motivation behind the Quesland government establishing 4QG, Australia’s first government-run terminal.
List Of Am-band Radio Station Lists Issued By The United States Government
Another well-known pioneer was Charles “Charlie” Maclurcan, whose 2CM station set many long and short wavelength records, but apparently never encountered medium waves, the subject of this article.
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The radio receiver is also the province of the detective, who must have a recording license. There was a lot of interest in receiving signals remotely (“DX” in layman’s words), and the registrar gained valuable experience in radio broadcasting, most of whom collected “QSL”-identification cards. Confirmation received with the audience. Distribution station.
Program materials were provided by lay people, including lectures, recitations, reading books and newspapers, and live or recorded music (in those days there were no royalties). Broadcast hours can be only a few hours a day and a few days a week.
The “Sealed Set” receiver is designed to receive the same frequency as the issuer, whose revenue depends on the sales or rtal of these receivers, a situation similar to that of Pay-TV services today. At the beginning of the radio frequency receiver, a simple “set of seals” was seen as good advice. But volunteer builders can create fanta (or “op”) receivers and thus get a wide range of messages for free.
This situation was unstable, and by mid-1924 the “op” suite had become legal, but under “permission from the broadcast registrar” and fees would be split among “A-class” publishers.
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Some of them (5MA in Adelaide and 3FC in Melbourne) could not adapt to the change and failed commercially. Perhaps most notably, the transmitters of both stations were on long wavelengths (850 m and 1720 m, respectively) unacceptable by conventional medium-wave receivers. Others are licensed “A-class”. 2FC was also on the long wavelength (1100 meters) but converted to 442 meters.
The number of “A-class” stations in New South Wales and Victoria is limited to two and one for each state. “B-class” stations are not filled by the same rules. They do not receive any part of the registrar’s license, but they are allowed to finance their work through advertising.
In 1925, the license for a local recording device was £ 1/15 / -, of which the station received £ 1/10 / -. It does not authorize the host of the news or program (which requires the consent of the broadcaster) or to increase the volume to suit the client, such as in a barber shop or hotel. That requires an additional £ 10 / – fee to be paid. Radio retailers are prohibited from installing loudspeakers outside the radio section of the store.
A 1962 recording license costs £ 2/15 / – per year per household and a television license costs £ 5 (£ 1/5 / – for the deaf and blind).
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It is difficult to recreate a trip to the post office is necessary. Difficulties in implementation due to eviction can be detected when the set is in use and a trial is expected. In 1974, these licenses were revoked by government reformist Whitlam.
Most lice continue or develop non-professional activities. Volunteers are obliged to pursue their passion on “non-professional” bands more often.
The Commonwealth government took over “A Class” broadcasters in 1928 when Australian Broadcasting Company Ltd. In each state: 2FC Sydney
In 1929 4QG in Brisbane, in 1930 5CL in Adelaide 1929 and 6WF in Perth. The General Post Office was responsible for the supply, maintenance and operation of the technical equipment of the studios and their distributors, giving the government the latest veto on ABC broadcasts, a position that lasted until the 1980s. Most ABC advertisements and transmitters are manufactured and installed by Amalgamated Wireless (Australasia) (AWA) or Standard Phones and Cables (STC), one or two by Scott and Co., of Sydney.
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Australian Broadcasting Corporation became an Australian Broadcasting Commission in July 1932, with 2FC, 2BL, 2NC, 2CO, 3LO, 3AR, 4QG, 4RK, 5CL, 5CK, 6WP and 7ZL stations creating a national system with large stations. Six cities and four. Area. The station creates a single network, and 2BL and 3LO form the basis of what will become a secondary network.
In October 1937, the roles of both NBS weapons were changed in Sydney and Melbourne: 2BL took over the No. 1 national program from 2FC. 3AR from 3LO and new 5AN from 5CL.
In the late 1950s, before stereo recorders became commonplace, and long before FM-stereo broadcasts, some stations (especially 3XY and 3UZ, but also 2CN and 2CY)
In partnership to continue programming a stereo station to each channel so subscribers can create a pair of radios and experience stereo effects. The experiment stopped after a few months. In the mid-1980s, a number of operators, including ABC Capital Station, chose to install a stereo switch (standard Motorola C-QUAM) on their transmitters.
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This system is not significantly different on regular radios, but very effective on compatible AM stereo receivers. Some of these (very difficult)
Recipients were sold, and the network abandoned the experiment without a fan. As of September 2020, the only AM station still broadcasting in AM stereo is 4WK (963 kHz).
According to the Convention, the “point on the dial” of the broadcaster was initially defined in terms of waves (in meters), from about 1940, increasingly in terms of frequency, which is more precise than all existing stations. Crystals to a polynomial of 5. kHz (or kilobytes per second in the vocabulary of time).
The correct formula for converting wavelengths to frequencies is: f (in kHz) = 300,000 / λ (in meters)
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Initially, the band was shared between a “Class B” operator working on a specific light wave and schedule, and a volunteer band that broadcast from time to time and ‘tried to transmit over a wave at the risk of Interference is minimized. In those days, getting a superheterodyne was too difficult for most recorders. The most common is a set of regenerative or adjustable radio frequency receiver crystals with poor channel rejection. Around 1930, many stations changed their operating frequency, apparently by accident and without a doubt, for good reason, though not shown. A major frequency shift program placed on broadcasters by the Postmaster General took place on September 1, 1935.
Some want to set all frequency standards to multiplication of 10 kcs / sec (10 kHz); Some to solve technical problems, such as interference from nearby transmitters (in some cases from New Zealand) and some to attempt to concentrate the “Class A” terminal to the low frequency (long wavelength) d of the call, although there are exceptions. Many. To this policy.
Another reorganization took place in June 1948, when 24 stations were controlled by switching frequencies. The reason is that giv is increasing power output from some New Zealand distributors.
As a result of the Geva frequency plan of 1975, on November 23, 1978, all broadcast stations moved to a new frequency on a 9 kHz “raster” basis, thus releasing a partially crowded AM band. Over the next few decades, broadcasters switched to FM, commercializing remote reception for less sophisticated transmitters and clearer sound. Most ABC AM stations continue to work against competing media (FM, DAB +, podcasts …) for global broadcasting, but many commercial stations have shut down or switched to FM and some distributors there. . He switched to a special broadcaster (Radio for the Disabled, Minority Radio, University Radio, Race Radio, News). A further development is the provision of small national and commercial mini repeater AM stations at different frequencies but with the same call signal as the main transmitter.
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The list does not include many Australian community radio broadcasters unless they relate to national or commercial broadcasters and, with some exceptions, ignore the studio, material, program, personality, network, brand, slogans and target audience.
The 1170 is on both 10 kHz & 9 kHz rasters, so there is no change for the GE75. 1170 kHz relocated to 1170 S on October 22, 2020.
The 1440 is on both 10kHz & 9kHz rasters, so there is no change for the GE75. It moved to 666 in 1983; 1440 tx is effectively used by 2PB.
1370 kHz after 1976 ?; Change call sign
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