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2 dishes with wb-68 install-get signals but no satellite info...

Discussion in 'DIRECTV Installation/MDU Discussion' started by trent741, Jun 16, 2012.

  1. P Smith

    P Smith Mr. FixAnything

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    It will fit if you will cut out a 'fin' from LNBF and make new center hole - I did that many years ago ...
     
  2. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    Why go through this when you don't have to? :confused:
    Take your compass and point the Phase III to the azimuth for 110.
    Select either 119 or 101 and tweak the dish into alignment. If you don't use the tilt, then the elevation will need more adjustment to compensate.
     
  3. P Smith

    P Smith Mr. FixAnything

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    Answer is - to get full strength signal from the good 18x20 reflector by putting the one relevant LNBF into focal point.
    OP using two dishes for two sats: 101W and 119W.

    Why need to keep unnecessary two LNBFs and lower signal of the P-III reflector when only one sat is desired ?
     
  4. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    Well let's see...
    DirecTV has been doing this for years, so the Ku levels with the 18x20 dish are good.
    I also "doubt" the levels would increase if the LNB was centered, since the two on either side are also "in focus" because of the oval design.

    Hell, some are using the 18x20 for the Ka LNBs because they don't want to use the larger dish.

    Maybe you like [enjoy] making a project out of this, and that's fine, but isn't needed either.
     
  5. HoTat2

    HoTat2 Hall Of Fame

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    OK P. Smith, if the OP wants to take the time and modify the LNB arm that way. It should work.

    But I'd certainly advise a way to seal off the excess openings created to either side of the narrower single LNB mounted in the center of the flared opening to prevent rain water from entering there and running down the inside of the feed arm during a storm.

    Otherwise you would have to weather-boot the coax connections to the LNB.
     
  6. HoTat2

    HoTat2 Hall Of Fame

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    Hey VOS;

    This might be a good place to ask if my theoretical assumptions are correct here. :)

    I thought like all multi-sat dishes the Phase III is parabolic shaped in the vertical dimension to allow for only one focal point along any lines parallel to the dish vertical centerline. But spherical shaped in the horizontal dimension to allow multiple focal points across the horizontal centerline of the dish face.

    Also, the integrated LNB and multi-switch allows closer spacing of the feedhorns over the discrete ones on the Phase II, which in turn permits use of a narrower (horizontally) 18" x 20" reflector.

    And since its oval shape approximates that of a rounded square, it has about the same surface area of its elliptical predecessor, the 18" x 24" Phase II (Para Todos). So there's actually no loss in gain going from a Phase II to a Phase III.

    So what do you think of my theory here? :grin:
     
  7. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    Life is made up of compromises :lol:
    A round parabolic had one focal point.
    The ovals distort this to a focal "area" where the LNBs are, and this will be more in the horizontal than the vertical, since the LNBs & SATs are spaced horizontally.
    The reflector area and focal points/area have been figured to give the same gain.

    IIRC my old Dish network "500" [110 & 119] upgrade was taller than wider than the single LNB dish it replaced.

    I even used this reflector on my Phase III as it's width/shape was the same horizontally, but had more area vertically, by a few inches.
     
  8. P Smith

    P Smith Mr. FixAnything

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    IMO, if a man cannot do some simple work at home like install single LNBF to P-III dish, he should be proficient in cleaning dishes, laundry, fixing kid's socks, etc ... :)
     
  9. trent741

    trent741 AllStar

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    Wow, now I'm really confused.... Here is why, the spot I can see the 119 sat I can't see the 101, so if I swap dishes it won't work...would it be better to get rid of the18x20 & just get another plain 18" dish and use the 2 18" dishes?
     
  10. trent741

    trent741 AllStar

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    Wow, now I'm really confused.... Here is why, the spot I can see the 119 sat I can't see the 101, so if I swap dishes it won't work...would it be better to get rid of the18x20 & just get another plain 18" dish and use the 2 18" dishes?
     
  11. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    Since you have one location that sees the 119, leave that dish there.
    Align the other dish for 101 reception. If this dish is the phase III, use the compass setting for the 110 as a base and select the 101 SAT and fine tune it.

    By the way, both dishes use the 1 8/5th mount, so they could be swapped.
     
  12. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    I took a look at my slimline a few mins back and it clearly has a shallower [larger/flatter] arc in the horizontal than it does in the vertical.
     
  13. HoTat2

    HoTat2 Hall Of Fame

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    Know you meant "1 5/8th" VOS, but more importantly related to this what do you think of this thread on the "other forum?"

    http://www.satelliteguys.us/directv-forum/286502-will-directv-installer-do.html

    To my surprise, supposedly all currently supplied DIRECTV dishes are adapted for use with the 2" OD mast. Certainly makes things less complicated, but still surprised to find out about this development nonetheless.

    Mines looks the same way, but just wanted to make sure it was not a case of me seeing what I wanted, to confirm my prior beliefs. :)

    So there's hope for my theory yet ... :lol:
     
  14. carl6

    carl6 Moderator Staff Member DBSTalk Club

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    As has been noted, you can use either dish at either location, and the other dish for the other location. Wherever they are now, I would leave them.

    If the Phase III dish is at your 101 viewing location, then align it for good signal on 101, and don't worry about 110/119. Then align the 18" dish for 119. If the other way around, basically the same. Align the 18" dish for 101 and the Phase III for 119.

    Then connect them as VOS has indicated. The 101 dish (whichever it ends up being) goes to the 13V/18V no tone inputs on your switch. The 119 dish goes to the 13V/18V 22KHz inputs on your switch. Two coax from each dish, so when you are done all 4 primary inputs to the WB68 will be connected.
    This link has a lot of information on the stack plans and different dishes, it may help you understand the overall process: http://hr20.dbstalk.com/docs/Dish, Multiswitch and Cable FAQ.pdf

    This thread has a lot of information about using multiple dishes to get 99/101/103/110/119: http://www.dbstalk.com/showthread.php?t=62223
     
  15. trent741

    trent741 AllStar

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    Ok, I will leave the 18" dish as it is for the 119 sat & use the phase 3 for the 101 which both satellites are getting good signal. So now all I should have to do is run coax from both lnbs from the 18" to the multiswitch and "2" from the phase 3 dish to multiswitch....only thing I'm not sure of is...does it matter which of the 4 spots of the lnb on the phase 3? Does it matter at all?
     
  16. trent741

    trent741 AllStar

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    Also I will make sure the 101 goes to no tone & 119 goes to tone side...
     
  17. P Smith

    P Smith Mr. FixAnything

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    And two coax cables from each location
     
  18. carl6

    carl6 Moderator Staff Member DBSTalk Club

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    It does not matter which two connectors you use on the Phase 3 LNB - they are all equivalent outputs of an internal multiswitch in the LNB assembly.
     
  19. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    No it doesn't matter because the Phase III has a switch so it connects to the correct LNB, with the correct voltage and no tone.
     
  20. P Smith

    P Smith Mr. FixAnything

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    So, oh, another point to drop the LNBs block - power consumption, feeding three LNBF and switch instead of one LNBF what is only really need.
     

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