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stabiliser arms for lnb arm?

  • 22-01-2007 9:30am
    #1
    crashedmind
    Closed Accounts Posts: 59 ✭✭


    Hi,
    I setup my first satellite system (motorised triax 88cm) about 6 months ago.
    Recently with high winds, the LNB arm (lnb end) jitters causing breakup of signal.
    I realigned the dish for the first time and that resolved the issue somewhat.

    However, I was wondering if there are there some kind of stabiliser arms that affix the lnb arm in place relative to the dish.
    There are 2 holes midway down on each side of the dish (approx 6mm diameter holes); is that what these are for?

    I did a quick search but nothing jumped out...

    Notes:
    Relocating the dish to avoid wind is not an option.
    The lnb arm mount itself is secured; this problem only happens in strong winds and is exacerbated by the dish becoming misaligned over time.


Comments

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


    screw on two lengths of plastic tubing. Or Fibre glass rod.

    Is the locking parts fitted properly at base of arm? I have no problem with 90 0r 110cm triax.


  • #3
    crashedmind
    Closed Accounts Posts: 59 ✭✭crashedmind


    thanks for the suggestions watty...

    Does it have to be non-conductive? i.e. is that why you suggested plastic/fibre glass. I'm guessing no... i.e. given that the existing arm is metal, 2 additional metal stabiliser arms would also work without interfering with the lnb.

    Yes locking arm is fitted properly.

    The house is at an elevation of approx 130m and the dish is fitted to the back wall where there is no shelter.
    The issue only occurs in strong winds i.e. >100km/h and especially recently with winds approaching 150km/h.


  • #4
    chelskifan
    Registered Users, Registered Users 2 Posts: 41 ✭chelskifan


    ...had the same problem too.
    I live in Swords and the wind snapped off the clip holding the quad lnb.
    It would have ended up north of the border only for the cables. Like Crashedmind my house is high and the dish is on the roof (HIGH trees at
    back of house). I re-read an old reply from Watty (thanks btw Watty) and
    went up onto the roof and refitted the lnb with a screw to hold it in place.
    It was only when I got back down I realised the misses gave me the signal strength rather than quality and had to go back up again :!!!! Then I noticed the 'drop' in the arm due to the weight of the quad so I compensated a little by elevating the dish ever so slightly and also had to 'tweak' the lnb a little to the left. Wouldn't have done it only for the info I've managed to aquire from this forum...many thanks to all over the last year or so for lots of info'/news.


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