brianl703
join:2004-02-26
Manassas, VA
| reply to metal80772
Re: I assume RG6 for in-home cabling?
said by metal80772  :The shielding on rg59 is far from adequate and allows all too much ingress/egress. That really depends on the RG59 you're talking about. RG59 intended for CCTV systems typically only has a copper braid and no foil. R59 intended for CATV systems has an aluminum braid and foil.
I would make no assumptions about the ingress/egress performance on a cable described only as "RG59", since that doesn't tell me what the shield construction is. |
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DarkLogix
join:2008-10-23
Baytown, TX
 ·Comcast Workplace
·Comcast
| which is why the standard is there
if someone says RG59 then who knows but if they say RG6 then you know its adequate
its what do you expect if you see the standard on the cable
RG59=replcase (unless you want to inspect it fully)
RG6= likely happy with it
RG6QS=very happy might just replace then ends if they are hex crimped or a do-it yourself job
RG11=you know money was spent and a pro likely installed it |
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baineschile
2600
Premium
join:2008-05-10
Sterling Heights, MI | reply to btownguy
No, you can use 11 if you supply it. Its just a lot more expensive. |
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brianl703
join:2004-02-26
Manassas, VA
1 edit | reply to DarkLogix
said by DarkLogix :which is why the standard is there if someone says RG59 then who knows but if they say RG6 then you know its adequate Nope, sorry, it does not work that way.
The RG6 designation tells you NOTHING about the type of shield it has. I've seen RG6 that consisted of nothing but a foil shield and a few wires, not even a full braid. (This garbage was sold by Radio Shack in the early 90s as pre-assembled cable).
About all you can conclude from an RG6 designation is that the cable has an 18AWG center conductor and 75 ohm impedance.
There is no standards body that defines what an RG6 cable is. RG6 is an old military specification that the military no longer uses. It is not like Cat5E where there is a defined performance criteria that cable must meet.
In fact, some cable manufacturers like Commscope don't even use the term RG6 to describe their cables (they use the term "Series 6" instead), and others use terms like "RG6-type". |
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brianl703
join:2004-02-26
Manassas, VA | »www.bluejeanscable.com/articles/rg6.htm |
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metal80772
join:2009-07-12
Pittsburgh, PA
| reply to brianl703
I agree about making assumptions(especially about RG6), but I was generalizing for sake of argument. In any sort, the majority of people that have rg59 in their homes, is a pretty fair bet that the shield construction is insufficient. Hence, the company that I work for, has created a policy to eliminate that from the system. |
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DarkLogix
join:2008-10-23
Baytown, TX | ya thats basicly what I mean
if you see RG6 you'll assume the worst
but every now and then the assumeption could be false |
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brianl703
join:2004-02-26
Manassas, VA
1 edit | reply to metal80772
said by metal80772 :In any sort, the majority of people that have rg59 in their homes, is a pretty fair bet that the shield construction is insufficient. Maybe it depends on what your system was using back then (and how far back "back then" was...in this case it's no earlier than about 1984, which is when Manassas got wired for cable), but around here *most* of the RG59-type cable I've seen was installed by Cablevision of Manassas, and what they installed was Commscope or TFC CATV drop cable which has a 67% braid and a bonded foil shield. Many older houses around here still have RG59 from the pole to the house. |
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brianl703
join:2004-02-26
Manassas, VA
| If you go back far enough (to the mid-70s) the typical RG59-type cable that was being installed had only a copper braid (I don't believe the technology to make an aluminum braid existed then). Many of the cable systems in the Pittsburgh area have been active since the late 60s, according to the FCC. It seems reasonable to assume that the RG59-type they installed in the late 60s and through the 70s is not up to the standards of the RG59-type that Cablevision of Manassas started installing in 1984. Prior to 1984, pretty much everything was wired with twinlead in this area. I lived in a house built in '83 that was pre-wired with twinlead!
So, perhaps, due to the age of the cable the system you are on is requiring the replacement of the RG59 type cable, some of which could reasonably be expected to be 40 years old. We don't have that problem here because the only entity that was installing RG59-type cable in any significant amount was Cablevision of Manassas and they started late enough that the technology to make a good shielded RG59 cable was already available. |
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