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Old 02-21-2013, 05:28 PM   #11
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Problem solved. I checked continuity between outside satellite hook up and connector at entertainment center. Checked fine on both the center wire and case. Then pulled faceplate off wall at entertainment end and discovered manufacturer used RG 59 instead of RG 6 which is required for HD on Direc TV systems using H25 receivers. I routed a RG 6 cable to the faceplate creating direct connection to the dish and all is working fine. Thanks for all the suggestions.
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Old 02-21-2013, 05:54 PM   #12
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I doubt very much that the change from 59 to 6 is what fixed this problem. You just happened to clean up the real problem in the process.
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Old 02-21-2013, 06:00 PM   #13
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Just a thought...I have heard that the pre-amp switch needs to be in the "off" position to receive signal from satelite or cable. The switch is used only for over-the-air reception.
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Old 02-21-2013, 07:41 PM   #14
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The preamp switch was tried in both positions. Then it was totally removed from the circuit. The rg59 was hooked directly to the receiver and did not work. When rg6 was connected in the same fashion it worked fine. A Google search explained that rg59 is definitely unsuitable for HD. Those in doubt should do the research.
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Old 02-21-2013, 08:02 PM   #15
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As a service tech for a cable company that has over 175 HD channels, I can assure you that the 59 cable will carry HD signal.
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Old 02-21-2013, 10:30 PM   #16
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Quote:
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As a service tech for a cable company that has over 175 HD channels, I can assure you that the 59 cable will carry HD signal.
Maybe on cable, but sat is a much higher frequency.
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Old 02-21-2013, 11:29 PM   #17
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StanleyG Have you ever a Direct TV H25 receiver with a swim box using 59 ?
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Old 02-22-2013, 01:00 PM   #18
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In all my radio-reference books, the RG-59 & RG-6 have about the same charactereistics except for the type of outside shielding & dialectric material used which makes the RG-6 a little larger and harder to work with which is probably the reason manufacturers of RV's and those wiring a home as a "spec." home would use RG-59. But, RG-59 is very suseptible to shorting out inside the coax if the wire has been either crimped or wound too tight! What happens is the inner conductor gets pushed through the thinner lighter foam dialectric and shorts out against the shielding which is most likely what happened in your case. Use of RG-59 for short runs as you would have in any RV should not effect the signal even with HDTV. But, the chances of problems is much greater if the RG-59 has been miss-handled prior or during construction. I have heard of many people thinking their newly purchased DVD or VHS player was bad and took it back for replacement or repair and the real problem was with the short coax patch cord of RG-59 if the coax was used instead of the direct connect method. I hope this clears this up. When buying long runs of coax for either antennas or satellite instillations the use of RG-6 is preferred, but beware the attachments of the connectors is much harder and the use of the proper tools will make installation a breeze. Just don't crimp that coax or make tight bends with it!!! Good Luck. W8RFK-Myron
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Old 02-22-2013, 02:42 PM   #19
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StanleyG Have you ever a Direct TV H25 receiver with a swim box using 59 ?
Our headend is wired with wire smaller than 59 and we put all our channels through it. Cable size makes a big difference if you are going a long distance. We have apartment complexes wired completely with 59 cable and they get HD, STD digital, telephone and high speed Internet over it.

With that being said, if the shield on the cable is poor, such as copper, that could make all the difference in the world. Copper braid shield acts like an antenna and attracts off air signals, such as tv or radio stations, and they could kill the sat signal.

There are several things that could have caused the sat not to work, just saying that if the 59 cable was a good cable, that would not cause yours not to work.
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Old 02-22-2013, 04:00 PM   #20
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Our headend is wired with wire smaller than 59 and we put all our channels through it. Cable size makes a big difference if you are going a long distance. We have apartment complexes wired completely with 59 cable and they get HD, STD digital, telephone and high speed Internet over it.

With that being said, if the shield on the cable is poor, such as copper, that could make all the difference in the world. Copper braid shield acts like an antenna and attracts off air signals, such as tv or radio stations, and they could kill the sat signal.

There are several things that could have caused the sat not to work, just saying that if the 59 cable was a good cable, that would not cause yours not to work.
That's right, although the braiding of the shield in RG-6 is much tighter and protects against both signal loss and intermod/interference. The less expensive coax should work OK/satisfactory but it all depends on how the coax was treated during installation and you might not know if it was tightly bent or accidently crimped where the inner conductor & outer shield are now compromised which makes a tremendous difference with digital & HD signals that we never had to be concerned about with analog. The installers at any RV or home construction site are, generally, not electronic engineers and probably do not understand anything about what we are discussing. I've seen it where whole runs of coax had to be ripped out because someone used a staple gun to connect the coax to studs and at each staple the shield was crushed to either shorting against the inner conductor or close enough to sap the signal away; both digital-HD killers!
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