sundance-communications.com/forum Forums Wiring - Telecom Carriers - Trunks & Services Cabling Telephones Systems Wiring RG6 Quad Shield

Do you guys think quad shield is really necessary?

It's not very popular here in my area except for the guys that push the "smart home" structured panels.

All the cable companies here use commscope and they provide it free to the builders. I tend to stick to Belden with T&B snap & seal ends, but never quad shield.

It depends on the CATV system and it's proximity to such things as airports. I too agree that its probably overkill in 99% of the cases even where the CATV companies spec it.

And as for those "Smart Home" guys, enough said.

-Hal

Quad shield is preferred for satellite TV so it's not a bad idea to use it. Is it necessary? Probably not.

Does DTV and Dish-net actually use it? I know the DTV installation kit includes normal RG6.

The two Canadian satellite, factory install technicians don't use it here.

Not really sure. I was just trained that way. We use QS when we can just in case. Probably overkill.

RG6 quad is recommended for Satellite installations. I have had several people have power issues with less than RG6 Quad. Don't know the reasons but they just do. All satellite companys around here use Quad shield and advises everyone else to do so as well.

Never seen QS used for sat, I can see no reason for it either. If you are having "power problems" its because of something else. Try a cable with a solid copper center conductor rather than copper plated steel. Also check the DC resistance of your connectors to the shield. It just might be that the connector makes better contact with QS shields than single ones.

-Hal

I agree, QS isn't going to help your signal or power loss issues, it's only going to help keep stray interference from entering it.

I have never seen a satellite installation with an interference problem due to something radiating into the coax. CATV and off-air systems, yes, maybe due to the frequency differences?

Yes to works both ways but usually its radiation or leakage that they are concerned about. Systems use the same frequencies as a great may terrestrial communications services. Big problem if the system is using air navigation frequencies, they are near an airport and they have leakage.

-Hal

A customer of ours put a 2 story addition on their building. We did the wiring for voce, data and SAT tv. SAT has a RG6 quad sheild home run from dish to basement. Another RG6 QS home run from basement to second floor to connect to SAT equipment. Direct TV is the provider. Every thing worked fine for about 5 months and then just quits. Direct TV comes out and says the problem is with the wiring. I go out, break the connection in the basement and meter out the cable form second floor to the basement, its shorted. Replace the F connectors, still shorted. Run new RG6 QS. Still not getting signal from the dish. Direct TV comes out and says the new cable will work but will fail again because it does not have a solid copper center conductor. That when you change chanels the converter sends a signal, with 13 to 18 volts to the dish and over time this voltage will cause the copper clad center conductor to fail (melt??)
Does this sound correct?

Its got me baffled. Thanks,
Steve