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Posted by Charlie Bress on August 29, 2006, 3:13 pm
It is almost impossible to splice coax and not introduce a spot that is not
75 ohms.
If I were doing this, I would put a good connector on the two ends and then
join them with a coupler.
The 75 ohm characteristic is a function of the diameters of the inner and
outer conductors and a simple splice will introduce a bump that will reflect
back part of the signal. When you use the appropriate connectors the
diameters are determined by the connector maker and tolerances should be
real close.
This will also eliminate any concerns of a short.
Charlie
>I am trying to splice some RG6 Dual Shield and RG6 Quad Shield coaxial
> cable.
>
> I have some questions:
>
>
> A). For stripping RG6 Quad Shield, one web site says to remove the
> outer two layers of aluminum foil and braid, then fold back the inner
> layers of foil and braid.
>
> Another web site says to cut off the outer 3 layers of foil and braid,
> leaving just the inner aluminum foil.
>
> Would either of these work? Does folding back the aluminum foil and
> braid make much of a difference?
>
>
> B) Would there be much signal degradation if I connected a stretch of
> RG6 Dual Shield to RG6 Quad Shield?
>
> If they're both rated 75 ohms, there wouldn't be any wave reflections,
> right?
>
>
> C) For coaxial cable, are there any safety hazards I should be aware
> of?
>
> If I short the inner conductor to the outer layers of shielding, how
> many amps would flow? Enough to damage appliances like a cable modem or
> TV, etc.?
>
>
>
> Thanks.
>
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