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SWM and R59

Discussion in 'DIRECTV Installation/MDU Discussion' started by Hdhead, Apr 16, 2010.

  1. Hdhead

    Hdhead Hall Of Fame

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    Jul 30, 2007
    Had a D* tech out today to align dish (got a call from D* saying I had low signal). I have R59 in the house and currently using it with 3 receivers without problem. Told the tech I want to upgrade to SWM16 when available for MRV. He said he would never install a SWM with R59 wiring present because it would fry (yes burn out) the wiring after a month or two. Is he correct??
     
  2. RobertE

    RobertE New Member

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    Sorta.

    RG59 should be ok from the SWiM to a receiver. Ideally it should be replaced if at all possible, but if it's not, you gotta do what you gotta do. :grin:

    Anyway, the bigger concern is putting the PI on RG59. Since 59 has a smaller center conductor it can cause issues with it's power carrying capacity. How well it works will depend on the quality of the cable.
     
  3. Hdhead

    Hdhead Hall Of Fame

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    The R59 is only in the walls from the basement to the various room wall plates. All the wiring from the SWM to the basement including the PI is RG6. Think I should be OK? But now I have to find an installer who will do it.
     
  4. texasbrit

    texasbrit Well-Known Member

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    RG59 will not "burn out", that's an installer "urban legend". In any case, with SWM the cables don't carry power, that's only for the non-SWM technology - apart from the cable from the PI to the dish. Additionally, the SWM frequencies are lower than those in a non-SWM system so the increased signal loss of RG59 at higher frequencies is not relevant. If a system works with non-SWM technology, it will work with SWM.
    With an SWM system, apart from the cable from the PI to the dish, there's no good technical reason for replacing RG59. The only reason to replace the RG59 is because the DireCTV install manual says you have to use RG6.
     
  5. Davenlr

    Davenlr Geek til I die

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    You decide. The power inserter uses 21-29 volts, and low current. I use RG59 and run 1000 watts of power to my 80 meter ham radio antenna, and it hasnt fried in over 10 years.
     
  6. joe diamond

    joe diamond Hall Of Fame

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    Finding an independent contractor is harder these days because Directv is moving their installations to their own in house system. The Rg59 usage is a pretense to allow the in house system to deduct money from the installer; they won't pay him if they find insignificant stuff like unapproved cable etc. so he feels a need to BS you and move on.

    Check your local advertising for someone who still has a contract. Some antenna installation companies or home theater folks may be able to direct you.

    Good luck,

    Joe
     
  7. JeffBowser

    JeffBowser blah blah blah

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    One of the reasons I went SWM was to allow a couple back bedrooms in my house to get satellite. They are at the end of some very long runs of embedded RG59. Worked great. However, I went with the SWM LNB, fed power to it from my attic, via RG6 to the dish.

     
  8. jbaron76

    jbaron76 Cool Member

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    I just had my service moved to my new home (built in the 80's) which is pre-wired with RG59. The only new cable he installed was for the PI which is on the line from the dish to the bedroom closest to the dish. Everything else is RG59. So far I have had no issues with MRV at all, and one of the DVR's is on connected to an RG59 run of over 100ft. All DVR's can access each other's content, and there are no pixelation issues whatsoever when watching a show from a remote DVR. It may be that the RG59 in my house is very good quality cable, but either way I am proof that RG59 can work for SWM and MRV.
     
  9. carl6

    carl6 Moderator Staff Member DBSTalk Club

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    Seattle, WA
    The ability to use existing RG59 was one of the design goals of the SWM technology with DirecTV. The key is that RG6 with solid copper core is used between the PI and the dish, because of the DC voltage/power carrying capacity. Beyond that point, from the PI to the receivers, RG59 should work just fine.
     
  10. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    100' RG59 has 2 dB more loss than RG6 @ 1800 MHz.
     
  11. paragon

    paragon Godfather

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    I have a SWM16. Each port has a 2-way splitter on it (one splitter goes to a C31 and an HR24, the other goes to an HR34 and a DECA for internet). All three runs through the walls from splitters to the three receivers are RG59 and all of the other runs are RG6 (PI is on RG6 to the standalone PWR port). I have no issues whatsoever.

    But on the issue of installers saying ridiculous things are going to burn out: when I had my HR34 installed, the installer told me I needed an open splitter port for each tuner on a receiver or the splitter would burn out (i.e., for the HR34 I needed one port hooked up to the HR34 and 4 ports left open). He insisted on installing an 8 way splitter and a 4 way splitter for my setup. I asked him to leave me two 2 way splitters and switched it right after he left. At least I got some spare bigger splitters for free if I ever need them.
     

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