coax

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coax

[′kō‚aks]
(electromagnetism)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

coax

This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)

coaxial cable

A strong, flexible, high-capacity cable widely used in audio, video and data applications. Commonly called "coax" (pronounced "co-axe"), the cable comprises a solid or stranded wire in the center, surrounded by insulation. The insulation is wrapped with a metallic foil or braided wire that serves as the ground line and interference shield. All of this is enclosed in a plastic cover, which may have a fire-safe Teflon coating.

There Are Many Types
Typically with impedances of 50 or 75 Ohms, cables have different outside diameters and maximum capacities for operating voltage. Designated with an RG (radio grade) prefix such as RG-6, cables are also rated for signal loss (attenuation in dBs per 100 feet). Following are common types; however, there are many more in use. See RCA connector and F connector.

        Impedance  Core   Layers        Range in   Dia.     inType         Ohms     (mm)   Sheath

  RG-6        75-76     1.0      2
  RG-6 Quad   75-76     1.0      4

  RG-58       50-53.5   0.9      1

  RG-59       73-75     0.81     1
  RG-59 Quad  73-75     0.81     4



Coaxial Cable
Coax uses two wires. The inner wire is the primary conductor. The ground wire is an aluminum or copper sheath that surrounds the insulation of the primary conductor and also serves as a shield against external interference.
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Jelena Dokic's touchline coach, sorry coaxer, wins the battle of the mad dads as his daughter gets past the new improved powerful frame of Mary Pierce.
With a simple twist of the mouthpiece the call can be changed from a close range coaxer to a medium to a long range call.
Lacking the necessary infrastructures and networks of clients as well as Chinese contacts to provide the full array of export related services, the members of these networks usually operate as coaxers. Connectivity and assistance among them is limited and resources flow, if at all, vertically, linking them to the communities' networks of accumulation that extend their assistance in cases of emergency--making sure to stress the charitable character of these transactions and thereby maintaining distinct power relations.
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