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Completed in 1963, it was once the tallest structure in the world, and stood at 2,063 feet (629 meters) until 2019, when the top mount VHF antenna was removed for the FCC spectrum repack, dropping the height to 1,987 feet (605.6 m). [1] In 1974, the KVLY-TV mast was succeeded by the Warsaw radio mast as the world's tallest structure.
Pinnacle Towers Mount Selman: Mount Selman, Texas: Guyed Mast 446.8 m KMSP TV Tower: Shoreview, Minnesota: Guyed Mast 446.7 m Media General Operations Tower Youngstown: Mount Selman, Texas: Guyed Mast 446.5 m KLKN TV-Tower: Utica, Nebraska: Guyed Mast 446 m WCES TV Tower: Wrens, Georgia: Guyed Mast 445.9 m New World Communications Tower ...
Sutro Tower is a unique three-legged 297.8 m (977 ft) tall TV and radio lattice tower located in San Francisco, California. Rising from a hill between Twin Peaks and Mount Sutro near Clarendon Heights, it is a prominent feature of the city skyline and a landmark for city residents and visitors.
For transmissions in the shortwave range, there is little to be gained by raising the antenna more than a half to three quarters of a wavelength above ground level, and at lower frequencies and longer wavelengths, the height becomes infeasibly great (greater than 85 metres (279 ft)). Shortwave transmitters rarely use masts taller than about 100 ...
An ideal monopole antenna radiates maximum power in horizontal directions at a height of 225 electrical degrees, about 5 / 8 or 0.625 of a wavelength (this is an approximation valid for a typical finite thickness mast; for an infinitely thin mast the maximum occurs at / = 0.637 [6]) As shown in the diagram, at heights below a half ...
The antenna can have a smaller or larger number of rod elements; in general, the more elements, the higher the gain and the more directional. Another design used mainly for UHF reception is the reflective array antenna, consisting of a vertical metal screen with multiple dipole elements mounted in front of it.
Panel antennas are common at Ultra high frequencies or UHF, where they are often used for cellular/mobile base stations or wireless networking due to their size and directional properties. At very high frequencies, such an antenna would be impractically large for most receiving applications unless implemented as no more than a two-bay design.
In 2004, the lights on the tower were turned off entirely until all of the bulbs could be replaced; the lights on the tower were reactivated on July 1, 2006, with white lights having been installed on all of its sections, as had originally been standard until the 1970s. Since then, the lights have not flashed for the purpose of being a notifier ...