Twin-lead
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Twin lead cable is a two-conductor flat cable used as a balanced transmission line to carry radio frequency signals. It is constructed of two, stranded copper wires, or solid copper-clad steel wires.
Piece of 300 Ω twin lead.
A 300-to-75 Ω balun, showing twin lead ribbon cable on the right hand side
Nominal 450 Ω "window line". The opening cut between the wires is one of the "windows".
500–600 Ω open wire line or ladder line feeding a high wire antenna.
Antenna feed
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A radio transmitter or receiver is connected to an antenna which emits or receives the radio waves. The antenna feed system or antenna feed is the cable or conductor, and other associated equipment, w
Twin-lead
…ribbon cable (75 or 300 Ω), window line (300 Ω, 350 Ω, or 450 Ω), and open wire line or ladder line (500~650 Ω). Twin lead is mainly used as an antenna feedline at shortwave and VHF frequencies, to connect radio receivers and transmitters to their antennas. It can have significantly lower signal loss than…
Coaxial cable feedline emerging from a VHF ground plane antenna
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