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W1WX is Boston's second former television station (the first being W1XAY). This station started up in April 1929, and was owned by Shortwave and Television Laboratory, Inc., (which was founded on December 5, 1928 by A.M. "Vic" Morgan, Hollis Baird, and Butler Perry).
The station started broadcasting on 2.12 MHz, alternating between 48 and 60 vertical lines and 15 frames per second. In 1930, it moved over to 2.1-2.2 MHz and broadcast at 48 lines only, still at 15 frames per second.
In 1934, the station switched back to 60 vertical lines only, running at 20 frames per second until it shut down.
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The abbreviation NTSC can refer to the National Television System Committee, which developed the analog television color system that was introduced in North America in 1954 and stayed in use until digital conversion. NTSC is also an abbreviation for the National Television Standards Committee, a subset of the National Television System Committee that was responsible for producing the detailed technical specifications for the transmission standard. It is one of three major analog color television standards, the others being PAL and SECAM.
Shortwave radio is radio transmission using shortwave (SW) radio frequencies. There is no official definition of the band, but the range always includes all of the high frequency band (HF), which extends from 3–30 MHz ; above the medium frequency band (MF), to the bottom of the VHF band.
The year 1930 in television involved some significant events. Below is a list of television-related events in 1930.
WBEN is a commercial AM radio station in Buffalo, New York. It broadcasts a news/talk radio format and is owned by Audacy, Inc. The studios and offices are located on Corporate Parkway in Amherst, New York, along with its sister stations.
WLW is a commercial News/Talk radio station licensed to Cincinnati, Ohio. Owned by iHeartMedia, WLW is a clear-channel station, often identifying itself as The Big One.
576i is a standard-definition video mode originally used for terrestrial television in most countries of the world where the utility frequency for electric power distribution is 50 Hz. Because of its close association with the colour encoding system, it is often referred to as simply PAL, PAL/SECAM or SECAM when compared to its 60 Hz NTSC-colour-encoded counterpart, 480i. In digital applications it is usually referred to as "576i"; in analogue contexts it is often called "625 lines", and the aspect ratio is usually 4:3 in analogue transmission and 16:9 in digital transmission.
Mechanical television or mechanical scan television is a television system that relies on a mechanical scanning device, such as a rotating disk with holes in it or a rotating mirror drum, to scan the scene and generate the video signal, and a similar mechanical device at the receiver to display the picture. This contrasts with vacuum tube electronic television technology, using electron beam scanning methods, for example in cathode ray tube (CRT) televisions. Subsequently, modern solid-state liquid-crystal displays (LCD) are now used to create and display television pictures.
The 405-line monochrome analogue television broadcasting system was the first fully electronic television system to be used in regular broadcasting.
WLLH is a commercial radio station in the Merrimack Valley region of Massachusetts. The station is owned by Gois Broadcasting, LLC, and airs a tropical music radio format. There are actually two transmitters with the call sign WLLH. Both operate at 1,000 watts using non-directional antennas on AM 1400. One is in Lowell, and there was a synchronous transmitter in Lawrence, together forming the two Ls in the call sign. The station has shut off the Lowell transmitter and change the City of License to Lawrence.
The concept of television was the work of many individuals in the late 19th and early 20th centuries, with its roots initially starting from back even in the 18th century. The first practical transmissions of moving images over a radio system used mechanical rotating perforated disks to scan a scene into a time-varying signal that could be reconstructed at a receiver back into an approximation of the original image. Development of television was interrupted by the Second World War. After the end of the war, all-electronic methods of scanning and displaying images became standard. Several different standards for addition of color to transmitted images were developed with different regions using technically incompatible signal standards. Television broadcasting expanded rapidly after World War II, becoming an important mass medium for advertising, propaganda, and entertainment.
Apex radio stations was the name commonly given to a short-lived group of United States broadcasting stations, which were used to evaluate transmitting on frequencies that were much higher than the ones used by standard amplitude modulation (AM) and shortwave stations. Their name came from the tall height of their transmitter antennas, which were needed because coverage was primarily limited to local line-of-sight distances. These stations were assigned to what at the time were described as "ultra-high shortwave" frequencies, between roughly 25 and 44 MHz. They employed amplitude modulation (AM) transmissions, although in most cases using a wider bandwidth than standard broadcast band AM stations, in order to provide high fidelity sound with less static and distortion.
This is a list of pre-World War 2 television stations of the 1920s and 1930s. Most of these experimental stations were located in Europe, Australia, Canada and the United States. Some present-day broadcasters trace their origins to these early stations.
WRNY was a New York City AM radio station that began operating in 1925. It was started by Hugo Gernsback's Experimenter Publishing Company to promote his radio and science magazines. Starting in August 1928, WRNY was one of the first stations to make regularly scheduled experimental television broadcasts. Experimenter Publishing went bankrupt in early 1929 and the station was purchased by the Curtiss Aeroplane and Motor Company to promote aviation. WRNY was deleted in 1934, as part of a consolidation on its shared frequency by surviving station WHN.
W1XAY was one of the first television stations in the world, being founded on June 14, 1928. It was called as "WLEX" from its sister radio station, in Lexington, Massachusetts, United States, the current day WVEI in Worcester.
W5XA was an experimental television station broadcast in Shreveport, Louisiana from 1929 to 1934.
A number of experimental and broadcast pre World War II television systems were tested. The first ones were mechanical based and of very low resolution, sometimes with no sound. Later TV systems were electronic.
Ulises Armand Sanabria was born in southern Chicago of Puerto Rican and French-American parents. Sanabria is known for development of mechanical televisions and early terrestrial television broadcasts.
441 lines is the number of scan lines in some early electronic monochrome analog television systems. Systems with this number of lines were used with 25 interlaced frames per second in France and Germany from 1939 to 1943, as well as by RCA in the United States with 30 interlaced frames per second from 1938 to 1941.
W8XWJ was a Detroit, Michigan "experimental audio broadcasting station", owned by the Detroit News, which operated from 1936 to 1940. It was classified as an Apex broadcasting station, i.e. it provided programming intended for the general public over what was then known as "ultra-high short-wave" frequencies. W8XWJ primarily broadcast unique programming, although it sometimes simulcast programs originating from co-owned AM station WWJ. In April 1940, W8XWJ was shut down, in order to be converted to a commercial FM station.
W4XA was an "experimental audio broadcasting station" operated by The National Life and Accident Insurance Company in Nashville, Tennessee from 1939 to 1940. It was part of a group of stations informally referred to as "Apex" stations, because it transmitted programming intended for the general public over what was then known as "ultra-high short-wave" frequencies. Although co-owned with AM station WSM, it primarily originated its own programs. W4XA ceased broadcasting in 1940, as station management prepared to inaugurate a new FM station, W47NV.