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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. List of video connectors - Wikipedia

   en.wikipedia.org/wiki/List_of_video_connectors

   Generally use coaxial cable types such as RG-6 and RG-59 (except for twin-lead). Belling-Lee/IEC 169-2 connector TV aerial plug (a.k.a. antenna plug) Television antenna connection for most video devices outside North America. Used by early home computers and game consoles to connect them to TVs because of the lack of any other connector.

5. Electrical cable - Wikipedia

   en.wikipedia.org/wiki/Electrical_cable

   Submersible cable; Twin and earth; Twinax cable; Twin-lead – This type of cable is a flat two-wire line. It is commonly called a 300 Ω line because the line has an impedance of 300 Ω. It is often used as a transmission line between an antenna and a receiver (e.g., TV and radio). These cables are stranded to lower skin effects.

6. 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 ...

7. 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 ...