English: Drawing showing construction of open parallel wiretransmission line, often called "ladder line". It consists of two bare wires held a precise distance apart by insulating spacers, usually made of plastic. It is used for feedline connecting antennas with radio receivers and transmitters. It's advantage is that by using a minimum amount of dielectric insulating material it has less attenuation (power loss) per meter than other types of transmission line such as Twin lead or coaxial cable.
This image or file is a work of a U.S. Air Force Airman or employee, taken or made as part of that person's official duties. As a work of the U.S. federal government, the image or file is in the public domain in the United States.
Uploaded a work by Francis J. Drollinger from Retrieved 2 February 2021 from [https://books.google.com/books?id=Bl1erNzgoncC&pg=PA20 Drollinger, Francis (1980) ''Ground Radio Communications Specialist Vol. 7: Auxiliary circuits and systems'', Extension Course Institute, Air University, US Air Force, p. 20, fig. 1-28] on Google Books with UploadWizard
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