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Guest Message by DevFuse

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Want to pre-wire for new installation, how many lines from dish?


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26 replies to this topic

#26 OFFLINE   peds48

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Posted 08 February 2014 - 01:57 PM

RF tends to travel on the surface of a conductor, this is known as skin effect.  DC current flows through the conductor, which is why solid copper core is specified for runs that carry DC power (like from the PI to the LNB). Copper clad steel does have greater resistance to DC current flow than does solid copper of the same size/gauge.  Resistance to RF is a consideration in some situations, but typically not in the normal DirecTV installation.

and that was my point.


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#27 OFFLINE   carl6

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Posted 08 February 2014 - 11:30 PM

If you look at most hardline (heliax as opposed to coax), the center conductor is usually hollow. It's a copper tube as opposed to a solid copper or copper clad steel conductor.  Advantages are lower cost and less weight, and for rf and the skin effect, it doesn't impact performance at all.  Those installations rarely carry DC power though, just rf.






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