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  2. Twin-lead - Wikipedia

    en.wikipedia.org/wiki/Twin-lead

    Twin lead cable is a two-conductor flat cable used as a balanced transmission line to carry radio frequency (RF) signals. It is constructed of two, stranded copper wires, or solid copper-clad steel wires. The wires are held a fixed distance apart by a plastic ribbon that is a good insulator at radio frequencies (usually polyethylene).

  3. Television antenna - Wikipedia

    en.wikipedia.org/wiki/Television_antenna

    Earlier antennas used a flat cable called 300 ohm twin-lead. The standard today is 75 ohm coaxial cable, which is less susceptible to interference which plugs into an F connector or Belling-Lee connector (depending on region) on the back of the TV. [6]

  4. F connector - Wikipedia

    en.wikipedia.org/wiki/F_connector

    The F connector was invented by Eric E. Winston in the early 1950s while working for Jerrold Electronics on their development of cable television. [1] In the 1970s, it became commonplace on VHF, and later UHF, television antenna connections in the United States, as coaxial cables replaced twin-lead. It is now specified in IEC 61169-24:2019. [2]

  5. List of catastrophic collapses of broadcast masts and towers

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

    Upper section of antenna broke loose and destroyed guy wires due to ice storm WAND and WJJY used the same RCA UHF antennas, mfg in 1969. TV channel 17 (488-494 MHz) Collapsed Easter Sunday. Nebraska Education Tower, Angora: February 1978: Guyed steel lattice mast 457 Ice Zehlendorf bei Oranienburg, East Germany May 21, 1978: Guyed steel lattice ...

  6. Balun - Wikipedia

    en.wikipedia.org/wiki/Balun

    For example, transformation of 300-Ω twin-lead or 450-Ω ladder line (balanced) to 75-Ω coaxial cable (unbalanced), or to directly connect a balanced antenna to unbalanced coaxial cable. To avoid feed line radiation, baluns are typically used as a form of common mode choke attached at the antenna feed point to prevent the coaxial cable from ...

  7. G5RV antenna - Wikipedia

    en.wikipedia.org/wiki/G5RV_antenna

    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 frequencies require a transmatch. [citation needed] There are many variants of the G5RV antenna. Two variations of the G5RV design, called ZS6BKW ...

  8. MIM-104 Patriot - Wikipedia

    en.wikipedia.org/wiki/MIM-104_Patriot

    [13] [14] The main gallium nitride (GaN)-based AESA array measures 9 ft × 13 ft (2.7 m × 4.0 m), is a bolt-on replacement for the current antenna, and is oriented toward the primary threat; two new rear panel arrays are a quarter the size of the main array and let the system look behind and to the sides, providing 360-degree coverage.

  9. Antenna rotator - Wikipedia

    en.wikipedia.org/wiki/Antenna_rotator

    An antenna rotator (or antenna rotor) is a device used to change the orientation, within the horizontal plane, of a directional antenna. Most antenna rotators have two parts, the rotator unit and the controller. The controller is normally placed near the equipment which the antenna is connected to, while the rotator is mounted on the antenna ...

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