1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Multiple Dish Installation (99/101/103 only)

Discussion in 'DIRECTV Installation/MDU Discussion' started by lk40, Sep 29, 2010.

Tags:
  1. carl6

    carl6 Moderator Staff Member DBSTalk Club

    12,524
    958
    Nov 15, 2005
    Seattle, WA
    lk40,

    Seems you have two questions to find answers to. First, will a 2-dish configuration actually work. Second, assuming yes to the first question, can you find two dish locations that will work for you. A third question actually follows - if you are that tight on clearance (trees/bushes/anything alive), how long before growth will take away your peek-a-boo view of the three orbital slots?

    I've got 2 slimline dishes and one regular (not swm) 3-LNB assembly (along with a variety of 5-LNB units). If anyone in the (Seattle) area has a 3LNB unit I could borrow for a few days, I will set up the 2-dish configuration to see if it will actually work.
     
  2. litzdog911

    litzdog911 Well-Known Member

    12,244
    71
    Jun 23, 2004
    Mill Creek, WA
    I'm also very curious to see if the two SlimLine3 dishes can work together. Hopefully someone can try this configuration. I don't have any 3-LNB SlimLine dishes to try this.
     
  3. goblazers_6

    goblazers_6 AllStar

    71
    0
    Apr 20, 2009
    I'll keep this in mind, maybe I'll test it out at work.
     
  4. CliffV

    CliffV Legend

    259
    0
    Jan 24, 2006
  5. lk40

    lk40 New Member

    8
    0
    Sep 29, 2010
    Carl6,
    I should have the SL-3 LNB on Friday along with a new dish.

    I'd be willing to let you use the gear, along with my assistance.

    PM me if you're interested.
     
  6. Greg4050

    Greg4050 Cool Member

    25
    0
    Jun 10, 2010
    I'd also love to be able to go with 2 dishes for rain fade. We recently "upgraded" our old 36" dish to get HD and have seen channels go out in storms that would have never bothered us.
     
  7. litzdog911

    litzdog911 Well-Known Member

    12,244
    71
    Jun 23, 2004
    Mill Creek, WA
    I don't think that multiple dishes would help much with rain fade. It's really just to work around too many trees.
     
  8. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

    42,684
    349
    Dec 9, 2006
    Greg, you can't combine dishes with active LNBs to increase your gain. Larger reflectors is all you can try.
    What has been posted here for using two dishes, is a combination that only has one LNB active for any one SAT location.
     
  9. carl6

    carl6 Moderator Staff Member DBSTalk Club

    12,524
    958
    Nov 15, 2005
    Seattle, WA
    I think you can go with an Alaska or Hawaii dish setup where you can get the larger dish with the applicable LNB's. However, I really doubt there are very many situations in the continental United States where the larger dish will really make a difference 99% of the time. Is it worth the expense and effort for the 1%?
     
  10. Greg4050

    Greg4050 Cool Member

    25
    0
    Jun 10, 2010
    The larger reflectors on both dishes is what I'm after. I havent seen any 3rd party rain fade solutions that handle multiple sats from one dish. Wouldnt this be a solution with both dishes being larger than the stock combo one I have now?


    Maybe we are just unlucky, but losing the signal in a storm always seems to happen at the wrong time. Since we've gone to HD this seems to happen much more often. I already have one oversize dish and numerous lnbs on hand, so not much extra expense to try this and a guy does need a hobby!

    Also we live on 10 acres, so I have plenty of spots I can set up these dishes w/o having to lot at them.
     
  11. eakes

    eakes Godfather

    354
    2
    Sep 21, 2007
    Practically speaking a slightly larger dish doesn't buy you anything as protection against rain fade. Rain fade loss can easily be 20 db or more. The gain of an antenna is proportional to its diameter - double the diameter and you gain 6 db, double again and you gain another 6 for a total of 12db. So, if we start with a 1.5 ft dish and change that to a 6 ft we have 12db of antenna gain. Even if you went to a 12ft dish (18db gain over 1.5ft) this would be less than the typical rain fade.

    A few years ago I fitted a LNB into a 6ft ku dish I have in the back yard and connected that to one of my receivers. My other receivers were connected to a PhaseIII dish also located in the back yard. Watching 4 TVs at the same time (one receiving from the 6ft dish), the receiver on the larger dish went out and came back at about the same time as the others during a thunderstorm. For the five minutes or so that the signal was faded there may have been 30 seconds of additional 'viewing time' using the larger dish.

    Bottom line is that going from the 18 inch dish to the Slimline makes no appreciable difference as far as fade margin goes.
     
  12. Greg4050

    Greg4050 Cool Member

    25
    0
    Jun 10, 2010
    Thanks for the info. We didnt switch from an 18" to slimline. It was more like 36" to 40"... not sure exactly. I guess its possible the new dish isnt peaked out, but its been enough change to notice. We had less rain than normal this year and its gone out more than usual.

    I'm not looking to solve the 1-5 minute outings, just the 20-30 minute ones where its hardly even raining, but pretty cloudy.
     
  13. carl6

    carl6 Moderator Staff Member DBSTalk Club

    12,524
    958
    Nov 15, 2005
    Seattle, WA
    A properly aligned slimline dish should exhibit almost no rain fade short of truly severe weather. It sounds like your dish could use some precision alignment. There is a very precise dithering adjustment to get a KaKu dish properly aligned. It takes a little time and a lot of installers take short cuts.
     
  14. ndole

    ndole Problem Solver

    1,915
    8
    Aug 26, 2009
    Even just clouds can cause SFSS. It all depends on their makeup and density.
    But it does indeed sound like you could use a proper alignment. Too many technicians don't (or didn't) dither.
     
  15. carl6

    carl6 Moderator Staff Member DBSTalk Club

    12,524
    958
    Nov 15, 2005
    Seattle, WA
    So did the LNB show up? Did you get a chance to install a two-dish 3-LNB setup, and if so, how did it work?

    I did PM you, but did not hear back, so figure you have things well under control. Just curious as to the outcome.
     
  16. lk40

    lk40 New Member

    8
    0
    Sep 29, 2010
    I had only one slimline dish shipped, and it came in a few days late. Had to run to Idaho for some work. Not sure when I can pick this back up.
     
  17. bingoca

    bingoca New Member

    2
    0
    Jan 25, 2014
    north
    Sorry for bringing up an old tread, but has anyone tried this? The two dish setup?

    I have really weak signal on 103 where I get some HD channels but not all of them.
     
  18. peds48

    peds48 Genius.

    20,082
    1,069
    Jan 10, 2008
    NY
    and are you sure this is because of line of sight issues and not a misaligned dish?
     
  19. texasbrit

    texasbrit Well-Known Member

    5,230
    109
    Aug 9, 2006
    a 2 dish system can only help if your line of sight to one of the satellits is blocked by trees.
    are you in canada? If so we can't help you because you are in breach of directv terms of service (plus directv reception is illagal in canada)
     
  20. bingoca

    bingoca New Member

    2
    0
    Jan 25, 2014
    north
    I'm near Whitefish, MN. It's pretty far north and I am out in the country a little bit.

    I had to install the dish myself and I used a signal meter from Radioshack. I tried for a while and got good signal on 101 but not so great on 99 or 103.
     

Share This Page