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2. List of tallest structures in the United States by height

   en.wikipedia.org/wiki/List_of_tallest_structures...

   Oklahoma City, Oklahoma Guyed Mast 491.6 m WFTV TV Tower Christmas: Christmas, Florida: Guyed Mast 491 m WJJY TV Mast: Bluffs, Illinois: Guyed Mast destroyed in 1978 491 m Media General Tower Jackson Jackson, Mississippi: Guyed Mast 491 m WHNS TV-Tower: Brevard, North Carolina: Guyed Mast 490.7 m KOBR-TV Tower: Caprock, New Mexico: Guyed Mast ...

3. Goliath transmitter - Wikipedia

   en.wikipedia.org/wiki/Goliath_transmitter

   Goliath used three umbrella antennas, which were arranged radially around three 210 m (690 ft) tall guyed steel tube masts and were insulated against the ground. At their edges, these antennas were mounted on grounded 170 m (560 ft) tall guyed lattice steel masts.

4. File:Antenna of Willis Tower, Chicago, IL.jpg - Wikipedia

   en.wikipedia.org/wiki/File:Antenna_of_Willis...

   You are free: to share – to copy, distribute and transmit the work; to remix – to adapt the work; Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made.

5. Guy-wire - Wikipedia

   en.wikipedia.org/wiki/Guy-wire

   A sailboat's mast is supported by shrouds (side-to-side) and stays (fore-and-aft) – nautical equivalents of guy wires.. A guy-wire, guy-line, guy-rope, down guy, or stay, also called simply a guy, is a tensioned cable designed to add stability to a freestanding structure.

6. Radio masts and towers - Wikipedia

   en.wikipedia.org/wiki/Radio_masts_and_towers

   The antenna used for broadcasting through the 1920s was the T-antenna, which consisted of two masts with loading wires on top, strung between them, requiring twice the construction costs and land area of a single mast. [2] (pp 77–78) In 1924 Stuart Ballantine published two historic papers which led to the development of the single mast antenna.

7. List of catastrophic collapses of broadcast masts and towers

   en.wikipedia.org/wiki/List_of_catastrophic...

   main mast of Shaanxi No.10 Transmitting Station, Chunhua, Xianyang, Shaanxi, China: May 2, 1982 [10] Guyed steel lattice mast 129 [11] High winds and corrosion Senior Road Tower, Missouri City, Texas, US December 7, 1982: Guyed steel lattice mast 569 Guy support wire severed Total collapse during installation of 6-ton FM antenna on new 1800 ft ...

8. Guyed mast - Wikipedia

   en.wikipedia.org/wiki/Guyed_mast

   Guyed masts are frequently used for radio masts and towers. The mast can either support radio antennas (for VHF, UHF and other microwave bands) mounted at its top, or the entire structure itself can function as a mast radiator antenna (for VLF, LF, MF). In the latter case, the mast needs to be insulated from the ground. Guyed radio masts are ...

9. G5RV antenna - Wikipedia

   en.wikipedia.org/wiki/G5RV_antenna

   [9] [better source needed] A length of at least 20 metres (66 ft) of 75 Ω (50 Ω) cable is recommended for operation without a balun. [10] [11] A transmatch (antenna tuner) is not required to use this antenna near its nominal design frequency of 14 MHz, and judicious length adjustments can sometimes include one other frequency band. All other ...