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KVLY-TV mast
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KVLY-TV mast
KVLY-TV mast
General information
Type
TV transmission tower
Location
Blanchard, Traill County, North Dakota
Coordinates
47°20′32″N 97°17′21″W / 47.34222°N 97.28917°W / 47.34222; -97.28917Coordinates: 47°20′32″N 97°17′21″W / 47.34222°N 97.28917°W / 47.34222; -97.28917
Completed
August 13, 1963
Owner
Gray Television
Height
628.8 m (2,063 ft)
Design and construction
Architect
Hamilton Directors
Main contractor
Kline Iron and Steel
Tallest structures in the world. (Note: KXJB-TV has since been renamed KRDK-TV.)
The KVLY-TV mast (formerly the KTHI-TV mast) is a 2,063 ft (628.8 m) tall television-transmitting mast in Blanchard, Traill County, North Dakota, United States, used by Fargo station KVLY-TV channel 11. Completed during 1963, it was the tallest structure in the world until succeeded by the Warsaw radio mast during 1974, which collapsed in 1991, again making the KVLY-TV mast the tallest structure in the world until the Burj Khalifa exceeded it in 2008. It remains the fourth-tallest structure in the world (since the construction of the Tokyo Skytree and the Shanghai Tower), the tallest structure in the western hemisphere, and the tallest radio mast in the world.
Contents
[hide]
1 Location
2 Construction
3 Owners
4 Specifications
5 Federal rule change
6 Images
7 Structures of similar height
8 See also
9 References
10 External links
Location[edit]
Location of KVLY-TV Mast.
The mast is located 3 miles (4.8 km) west of Blanchard, North Dakota, halfway between Fargo and Grand Forks. It became the tallest artificial structure, and the first man-made structure to exceed 2,000 feet (610 m) in height, upon the completion of its construction on August 13, 1963.
Construction[edit]
The tower was built by Hamilton Erection Company of York, South Carolina and Kline Iron and Steel, and required thirty days to complete, at a cost of US$500,000 (worth $3,911,413 today).
Owners[edit]
Owned by Gray Television of Atlanta, Georgia, the tower broadcasts at 356 kW on channel 44 for television station KVLY-TV (channel 11 PSIP, an NBC/CBS affiliate) which is based in Fargo. The tower provides a broadcast area of roughly 9,700 sq mi (25,000 km2) which is a radius of about 55.6 miles (89.5 km).
When the mast was built the call letters of the television station for which it was built were changed to KTHI, the "HI" referring to the height of the mast. The top is reachable by a two-person service elevator (built by Park Manufacturing of Charlotte, NC) or ladder.
Specifications[edit]
The tower consists of two parts: a lattice tower of 1,950 feet (590 m);[1] topped by a transmitting array of 113 feet (34 m). The total height of both is 2,063 ft (628.8 m). The antenna weighs 9,000 pounds (4.3 tons; 4,300 kg), the lattice tower weighs 855,500 pounds (388 tons; 388,000 kg), giving a total weight of 864,500 pounds (392 tons; 392,100 kg). It takes up 160 acres (0.65 km2) of land with its guy anchors.[2][3] Its height above mean sea level is 3,038 ft (926 m).
Federal rule change[edit]
Some time after its completion, the Federal Communications Commission (FCC) and Federal Aviation Administration (FAA) imposed a policy that states, "Although there is no absolute height limit for antenna towers, both agencies have established a rebuttable presumption against structures over 2,000 feet above ground level."[4] The FCC and FAA may approve a taller structure in "exceptional cases."
Images[edit]
KVLY tower from a distance of about one mile (1.6 km)
Base of the tower
A guy-wire anchor
Detail of the tower, showing its network of guy-wires
Some of the guy-wires that support the tower (with Stockbridge dampers)
Structures of similar height[edit]
KRDK-TV mast (2060 ft - 627.8 m)
KXTV/KOVR Tower (2049 ft - 624.5 m)
See also[edit]
List of tallest structures in the world
List of tallest structures in the United States
References[edit]
Jump up ^ "N.D. TV Tower No Longer World's Tallest". All Things Considered. NPR.org. 5 January 2010. Retrieved 2011-12-06.
Jump up ^ "KVLY-TV Tower". Emporis. Retrieved 2011-12-06.
Jump up ^ "Info". Valleynewslive.com. Archived from the original on August 6, 2010.
Jump up ^ "Antenna Tower Lighting and Marking Requirements". Federal Communications Commission. Retrieved 2011-12-06.
External links[edit]
Wikimedia Commons has media related to KVLY-TV mast.
KVLY Tower at Structurae
Tower web page at KVLY-TV
"Listing 1046244". Antenna Structure Registration database. U.S. Federal Communications Commission.
Listing on the Skyscraper Page
Drawings of KVLY/KTHI TV Mast from the Skyscraper Page
KVLY and KXJB Towers from PBPhase.com
Video of the KVLY Tower, summer 2009 from YouTube
Records
Preceded by
WIMZ-FM-Tower World's tallest structure
2,063 ft (628.8 m)
1963–1974 Succeeded by
Warsaw radio mast
Preceded by
Warsaw radio mast
1991–2008 Succeeded by
Burj Khalifa
Retrieved from "https://en.wikipedia.org/w/index.php?title=KVLY-TV_mast&oldid=805041688"
Categories:
Towers in North Dakota
North Dakota media
Buildings and structures in Traill County, North Dakota
Radio masts and towers in the United States
Gray Television
1963 establishments in North Dakota
Buildings and structures completed in 1963
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Siltronic
From Wikipedia, the free encyclopedia
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Siltronic AG，is a Munich-based company, which is one of the top Silicon Wafer suppliers in the world. It is 60% owned by Wacker Chemie AG and the single European-based Wafer supplier. Siltronic AG was founded 1968 as Wacker-Chemitronic GmbH in Burghausen. In 1994 the company name was changed to Wacker Siltronic GmbH. The foundation of an Aktiengesellschaft (Wacker Siltronic AG) took place in 1996. In 2004 the name was changed again to Siltronic AG. Since 2015 it has been stock listed.
Production sites[edit]
Burghausen, Germany
Freiberg, Germany
Portland, United States
Singapore, Singapore
Siltronic AG sells Silicon Wafers with diameter from 100mm to 300mm (up to 12 inch) with many different features such as:
Crystal growth according to Czochralski method or Float Zone method
Polished, epitaxial, as cut, lapped, etched surface
Argon Annealed wafers
Siltronic AG and Samsung Electronic of South Korea are partner in a joint-venture to produce 300mm (12 inch) wafers in a factory in Singapore.
External links[edit]
Siltronic

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