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Thread: Antenna mast made from aluminium tube

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  1. #1
    Join Date
    Jun 2004
    Location
    Klepp, Norway
    Posts
    28

    Default Antenna mast made from aluminium tube

    I'm planning to make a crank up mast made from one 100x100x5x6000mm and one 80x80x5x6000mm square aluminium tube(6082 alloy), where the smaller tube will telescope inside the larger one. (My idea is something similar to the Tennamast 10.7m Standard mast http://www.tennamast.com/en/Standard...10.7m-p26.html )
    I'm not quite shure how strong the aluminium mast will be compared to a Steel mast of the same dimensions. The total height of the mast will be around 11m. My plan is to use this for a broadband Hexbeam antenna. would this setup need to be guyed or is it ok to use it as a free standing mast? Another option is to attach the mast to the house at around 4-5m height.
    Any ideas or comments will be appreciated.


    73 de LA3AKA, Johnny

  2. #2
    Join Date
    Jul 2007
    Location
    Stavanger Norway
    Posts
    47

    Default

    Johnny, it sounds a bit lightweight. Steel would be stonger, 5mm is rather thick, so it could work with your guy wire idea using the aluminum...
    Free standing, no, attached at 4-5 meters up, good idea, plus your guy wires.

    good luck,
    73 de XE3 / KB5VWZ ex LA1BRA (stavanger)
    tom
    Tom Layne

  3. #3
    Join Date
    Apr 2001
    Location
    Shropshire. England.
    Posts
    17,134

    Default

    Square aluminium tubing is not as rigid as round tube and it will wave about in any wind unless its guyed

    Mel G0GQK

  4. #4
    Join Date
    Jun 2004
    Location
    Klepp, Norway
    Posts
    28

    Default

    May be I should consider 100x100x5mm square for the bottom section and 75x5mm roundtube for the top section, with bottom section attached to the house.

    73 de LA3AKA

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