Radio Radio In 1973, the first commercial radio station, LBC started broadcasting as a rolling news channel. This was followed a week later by Capital Radio (Now Capital FM) which was set up has a entertainment channel. ...more on Wikipedia about "1973 in radio"
The Affiliated Media Foundation Movement is a United States grassroots effort to produce public radio serving the needs and interests of low and moderate income Americans, with an emphasis on social justice issues. ...more on Wikipedia about "Affiliated Media Foundation Movement"
Airborne radio relay is a technique employing aircraft fitted with radio relay stations for the purpose of increasing the range, flexibility, or physical security of communications systems. ...more on Wikipedia about "Airborne radio relay"
In the radio industry, an aircheck is generally a demonstration recording, often intended to show off the talent of an announcer or radio disk jockey to a prospective future employer. A scoped aircheck contains only segments where the announcer is actually talking. An unscoped aircheck is simply where all programming is left intact, including music, commercials, newscasts, or whatever happened to be on the air at the time the recording was made. ...more on Wikipedia about "Aircheck"
The Alexanderson Day, named after the inventor Ernst Fredrik Werner Alexanderson, is the day of the open house at the VLF transmitter Grimeton. On Alexanderson Day the only workable Alexanderson alternator transmitter in the world is used to transmit short Morse messages on 17.2 kHz, which should be easily receivable in all of Europe. A modern and very convenient way for their reception is a PC with a coil connected to the soundcard input and FFT-analysis software. The transmitter is preserved as a historical remnant of early radio technology and as an example of VLF (Very Low Frequency) equipment. ...more on Wikipedia about "Alexanderson Day"
The All American Five was a superheterodyne radio receiver designed in the USA in the 1930's. The philosophy behind the design was simple: it had to be as cheap to make as possible. All other considerations were secondary including performance and safety. At least one radio manufacturer preferred to go bankrupt rather than manufacture this set. ...more on Wikipedia about "All American Five"
AM radio is radio broadcasting using Amplitude Modulation. ...more on Wikipedia about "AM broadcasting"
AM stereo is any of a number of mutually incompatible techniques for broadcasting two-channel audio in the mediumwave band in a manner that is compatible with receivers designed for standard amplitude modulation. There are two main classes of systems: independent sideband (ISB) systems, promoted principally by American broadcast engineer Leonard Kahn; and quadrature amplitude modulation (QAM) multiplexing systems (conceptually closer to FM stereo). ...more on Wikipedia about "AM stereo"
An antenna analyzer (or noise bridge, or RX bridge) is a bridge where two legs are frequency-dependent complex-valued impedances. When the two impedances are the same the bridge will be balenced. Uisng this circuit it is possible to either measure the impedance of the antenna connected between ANT and GND, or it is possible to adjust an antenna until it has the same impedance as the network on the left hand side. The bridge can be driven either with white noise or a simple carrier (connected to drive). In the case of white noise the amplitude of the exciting signal can be very low and a radio receiver used as the detector. In the case where a simple carrier is used then depending on the level either a diode detector or a receiver can be used. In both cases a null will indicate when the bridge is balenced. ...more on Wikipedia about "Antenna analyzer"
An antenna tuner, transmatch, antenna tuning unit, or ATU matches a transceiver with a fixed impedance (typically 50 ohms for modern transceivers) to a load (feed line and antenna) impedance which is unknown, complex or otherwise does not match. This mismatch is usually caused when using a non- resonant antenna, one that is not the correct electrical length as compared to the wavelength of the signal. An ATU allows the use of one antenna for a broad range of frequencies. A tuned antenna is never as good as a naturally resonant antenna due to additional induced losses on the feed line due to the multiple reflections, and losses in the ATU itself. ...more on Wikipedia about "Antenna tuner"
Automatic message exchange (AME): In an adaptive high-frequency (HF) radio network, an automated process allowing the transfer of a message from message injection to addressee reception, without human intervention. Through the use of machine-addressable transport guidance information, i.e., the message header, the message is automatically routed through an on-line direct connection through single or multiple transmission media. ...more on Wikipedia about "Automatic message exchange"
The Beromuenster Transmitter is the nationwide receivable transmitter for German speaking Switzerland. It was inaugaurated at the beginning of the 1930s. Since 1937 the Blosenbergturm, a free standing steel tower which is grounded, is the main aerial. Furthermore there is another free standing steel tower, which is grounded just like the Blosenbergturm. It works as a backup aerial. ...more on Wikipedia about "Beromuenster Transmitter"
Block programming is an age-old strategy of programmers. Block programming occurs when the channel schedules similar programs back to back. The concept is to provide similar programming to keep the viewers glued to your channel. Radio stations use it consistently: they program the same type of music for an entire daypart. Early radio used to air soap operas in the daytime, children's programs after school, and comedies, dramas, and music programs in the evening hours. Consider NBC's "must-see-TV" Thursday evenings, 2 hours of sitcoms and 1 hour of ER. ...more on Wikipedia about "Block programming"
(Braid-breaker) The braid breaker is a term for one of the best filters for preventing TVI. It is the case that in many cases of TeleVision Interferance caused by a high field strength of a nearby HF transmitter that the aerial downlead plugged into the back of the TV acts as a longwire antenna or as a simple vertical element. The RF current flowing through the tuner of the TV tends to generate harmonics which then spoil the viewing. ...more on Wikipedia about "Braid-breaker"
Carrier current is a method of low-power broadcasting that uses the electrical system of a building to distribute an AM radio signal. This is one method used for college and high school radio, particularly if the signal is only intended to be picked up in a small area. Many established college radio stations originally began as carrier current stations. While the technology is still used by a number of student-run stations today, the popularity declined beginning in the 1980s, as popular music radio formats quickly migrated to the FM band. The popularity of streaming audio over the internet has hastened this decline. ...more on Wikipedia about "Carrier current"
Carrier frequency is the fundamental frequency used in both amplitude modulation and frequency modulation i.e. it is the frequency of the carrier which is modulated and is the frequency to which a receiver should be tuned in order to demodulate the information signal. It is, simply, the fixed frequency upon which the variable modulator frequency will be imposed, and the beat frequency of the two is what the listener will hear. ...more on Wikipedia about "Carrier frequency"
A cellular network is a radio network made up of a number of radio cells (or just cells) each served by a fixed transmitter, normally known as a cell site or base station. These cells are used to cover different areas in order to provide radio coverage over a wider area than the area of one cell. Cellular networks are inherently asymmetric with a set of fixed main transceivers each serving a cell and a set of distributed (generally, but not always, mobile) transceivers which provide services to the network's users. ...more on Wikipedia about "Cellular network"
Citizens' band radio (CB) is, in the United States, a system of short distance radio communication between individuals on a selection of 40 channels within the single 27 MHz (11 meter) band. The CB radio service should not be confused with FRS, GMRS or amateur radio. CB does not require a license and unlike amateur radio, CB may be used for commercial communication. ...more on Wikipedia about "Citizens' band radio"
:This article is about the class of AM radio stations that are called clear channel stations based on their technical parameters, not their owner. For the company named Clear Channel, which owns radio stations most of which are not in this class, please see Clear Channel Communications. ...more on Wikipedia about "Clear channel"
Cormac Battle, an ex- Kerbdog and Wilt front-man, is the presenter of Radio Telefís Éireann (RTÉ) 2 FM's alternative music programme, The Wireless, which airs every Sunday. 2FM is a national radio station in Ireland. ...more on Wikipedia about "Cormac Battle"
According to the principle of diffraction, when a wave front passes an obstruction, it spreads out into the shadowed space. A Creeping wave, in electromagnetism or acoustics is the wave that is diffracted around the shadowed surface of a smooth body such as a sphere. ...more on Wikipedia about "Creeping wave"
It must be shortopedia. Radio
Cult radio, like cult figure and its audio-visual equivalents cult television and cult film attracts a band of aficionados devoted to a particular program. (For a fuller discussion of this sense of "cult", see cult film.) ...more on Wikipedia about "Cult radio"
In broadcasting, dayparting is the practice of dividing the day into several parts, during each of which a different type of radio programming or television programming apropos for that time is aired. Programs are most often geared toward a particular demographic, and what the target audience typically engages in at that time. ...more on Wikipedia about "Dayparting"
In radio programming, a deep cut or deep track is a song which commercial radio stations rarely broadcast for one or more reasons: ...more on Wikipedia about "Deep cut"
The word deviation means an act of deviating, or the amount by which something has deviated, or the (real or metaphorical) route followed by a deviation. ...more on Wikipedia about "Deviation"
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