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3 sats on one dish. Will this work ?

Comments

  • Closed Accounts Posts: 2,393 ✭✭✭Eurorunner


    Pal wrote: »
    Big problem is the squeezing in of 16e in the middle on the bracket.

    I propose to use this product for 13e and 16e
    http://www.tringsat.com/index.php?page=shop.product_details&category_id=14&flypage=flypage.tpl&product_id=51&option=com_virtuemart&Itemid=53&vmcchk=1&Itemid=53

    and then add another LNB for 19e.

    possible ?

    Tony ?

    Stay away from the monoblocks - they are geared towards useage in Germany or nordic countries. Use three x slimline lnbs ie. alps - and theres another brand who's name escapes me at the moment. I have all three of these sats fitted in on a T90 dish using slimline Quad lnbs.
    What size is your dish and whats your location?


  • Registered Users, Registered Users 2 Posts: 32,417 ✭✭✭✭watty


    A t90 is best allowing up to a 45 degree spread and as little as 3 degrees spacing.

    For what you want definitely use T90 Wavefrontier
    (for 3 degree space) and Alps LNBs (as pictured they have a spike instead of a horn)

    A regular dish is about 18 degrees max, typically 15 degrees but typically a minimum of 5 degree spacing using regular LNBs. Even with Alps, the 13E & 19E may be slightly out if 16E is perfect.

    Mono blocks have wrong spacing for Ireland and also make it hard to add a 3rd or 4th LNB.

    Use a separate 4 way switch, e.g. Global 4-way Diseqc.

    multifeed.jpg

    The left /west is 28.2 and far right / east is 13E. You can see that even an Alps will hardly fit properly between the 13E and 19E. You can just about do 10E instead if you take off the 13E. A non T90 dish like the picture needs the weaker satellites/channels on the LNBs closest to arm. Since Sky etc works on a 60cm dish it works ok at extreme offset on the 90cm dish. Note the "multi-LNB bracket" (Triax) has been re-drilled about 1/3rd along to mount on the dish arm such that the dish points at 16E and either side of main arm is 13E and 19.2E

    For bigger spread than 40 degrees and weaker signals a 36V Motorised 1.2m is recommended. You can use a lightwieght Triax 1.1m and Moteck or similar Diseqc motor in a sheltered location.

    Advantage of multiple LNB (on regular or T90) is that you get fast channel change between satellites and can use multiple receivers. The LNBs pictured are Quattros which can drive up to a 1000 receivers. They drive up to 16 at the moment via a single 16 outlet Multiswitch.

    For a more Modest system one LNB can be Quad and 3 are singles so you can have a PVR on one satellite and 4way switch to second receiver.


  • Closed Accounts Posts: 4,115 ✭✭✭Pal


    Thanks guys.

    I need new equipment then.

    location Dublin. Existing 80cm with 13e 19e 28e

    is 16e any good on 80 cm ?


  • Moderators, Regional North West Moderators Posts: 19,158 Mod ✭✭✭✭byte
    byte


    In Dublin, it might be OK, though you'd possibly be better with 90cm or 1m. I used an 80cm (A Triax TD78, so I guess it's 2cm short of 80) in Donegal, and it had poor results. It worked grand on sunny days, but once rain came along, the signal dropped. Using a 110cm instead now.

    Maybe somebody here is in Dublin that can advise on how good/bad 80cm would be on 16E from their own experience?

    Is it Tring you're after, or DigitAlb? I notice that Digitalb SuperSport needs quite a good signal to keep alive. Dunno if it's because of its 7/8 FEC.


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