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Thread: "different lnb"

  1. #1
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    Default "different lnb"

    those c/ku lnbs that are of very limited use nowadays can be quite useful
    separate the ku bit and pack it into a c band scalar ring and works well
    used slices of 50mm drainpipe to make a C and smaller c s
    the c band one can be used as is on another dish or discarded

  2. #2
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    I found the Ku / C LNB very fussy re being pointed at the center of the dish to get the Ku part to work.

    What were you pointing your new Ku LNB at? 12395 v 20106 on Optus D1 maybe?

  3. #3
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    had the idea ages ago and used it on a 1m2 dish which seems a tad small for 12396

    on the combined c/ku lnb the ku bit is too far in to see anything properly and then c and ku often have different skews
    and the ku lnb is a prime focus type which comes in handy

  4. #4
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    Well they are only good if used firstly on a solid dish, and secondly the KU is definatley a bit deaf so a large dish is good.

    They are a trade off system.

  5. #5
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    Quote Originally Posted by Feralkiwi View Post
    I found the Ku / C LNB very fussy re being pointed at the center of the dish to get the Ku part to work.

    What were you pointing your new Ku LNB at? 12395 v 20106 on Optus D1 maybe?
    Sure, that's the same with any larger dish on KU band. Try tuning a 3m on KU band that is weak and you are moving the lnb in fractions of a Millimeter.
    PITA to setup. Actually I use a cband lnb first most cases to track the correct satellite then switch to the KU is it's really weak.

    The 3m dish pointing to the rear with a single polarity Norsat is at KU band Thaicom 78.5. I am in Taiwan. The dish at front is a 3m cband at same satellite but now is a 4.2m
    If you go to the official footprint map you will see I am around 3000km out of footprint lol. The H polarity on this bird is very poor but the V on KU is actually quite good.

    The larger the dish the finer the tuning needs to be on KU band.

    Last edited by BLACKCRUSADER; 10-05-2016 at 06:34 PM.

  6. #6
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    the ku bit of a c/ ku combined lnb works well once separated

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