RG-6/U is a common type of
coaxial cableused in a wide variety of residential and commercial applications. The term "RG-6" itself is quite generic and refers to a wide variety of cable designs, which differ from one another in shielding characteristics, center conductor composition, and dielectric type. RG-6 was originally a military spec where RG means Radio Guide, but is now obsolete; in practice, the term "RG-6" is generally used to refer to coaxial cables with an 18 AWG center conductor and 75 ohm characteristic impedance.
The most commonly-recognized variety of RG-6 is
cable television(CATV) distribution coax, used to route cable television signals to and within homes, and RG-6 type cables have become the standard for CATV, mostly replacing the smaller RG-59, in recent years. CATV distribution coax typically has a copper-coated steel center conductor and a combination aluminum foil/aluminum braid shield, typically with low coverage (about 60%). RG-6 type cables are also used in professional video applications, carrying either baseband analog video signals or serial digital interface(SDI) signals; in these applications, the center conductor is ordinarily solid copper, the shielding is much heavier (typically aluminumfoil/95% copperbraid), and tolerances are more tightly controlled, to improve impedance stability.
RG-6 cables typically are fitted with various types of connector at each end; in CATV distribution applications, these are typically
F connectorstyle; in professional baseband video, BNC connectors; and in consumer a/v applications other than RF and CATV, RCA plugs.
* [http://lists.contesting.com/_towertalk/1999-06/msg00184.html COAX History]
* [http://www.bluejeanscable.com/articles/rg6.htm What Does "RG-6" Mean?]
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