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During World War II,
the government created a specification for military-grade cable and assigned the
designation RG-#/U,
where "RG" stands for Radio Guide and the "U" stands for Utility. The "dash number"
was sequentially issued and has no bearing on the characteristics of the cable.
Founded in 1902 in St. Louis, Missouri, by
Joseph Belden, the eponymously
named company has been and continues today designing and manufacturing coaxial cable.
Most of the RG-x/U coaxial cable types
displayed in this 1951 Radio & Television News magazine advertisement
are still being used today, in particular the very familiar RG−58/U (50 Ω),
RG−59/U (75 Ω), RG−8/U (50 Ω), and RG−11/U (75 Ω). RG−5/U (52 Ω)
and RG−54/U (58 Ω) are hard to find nowadays, although all these types can
be purchased through companies like Allied
Wire and Cable.
Belden Radio Wire
 Be Sure of Your Installations
Get the Aptitude Tested
RG/U Transmission Line Cables
• You know what you are doing when you use Belden RG/U Transmission Line
Cables - they're aptitude rated. They are designed to provide desirable electrical
characteristics, and rigid control assures constant quality.
Specify Belden Radio Wires.
Belden Manufacturing Co.
4681 W. Van Buren Street
Chicago 44, Illinois
Belden Radio Wire
The Aptitude-Tested Line
Posted July 30, 2020
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