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Thread: Need advice in buying another outside antenna

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  2. #12
    Captain
    Join Date
    Apr 2018
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    Do you have a way to get the antenna cable outside?
    Trying to get the coax cable through the window cracks will only result in bad signal, no matter how you approach it.

    If you can get electricity to the balcony it's probably best to mount the Raspberry Pi there and protect it with a box.

    The cheap antenna i linked is quite a bit smaller:
    https://www.ebay.com/itm/173397271470

    You'll have to make your own mounting solution though.
    And you need an adapter (https://www.ebay.de/itm/352599709689)

    And SMA terminated coax cable, CFD200 or LMR195 / LMR200.
    (don't get RP-SMA connectors they are incompatible)


    Anyhow you should understand how ADS-B reception works:
    https://forum.flightradar24.com/thre...ange-I-can-Get

    If you are surrounded by other buildings, your range will be poor no matter the antenna and dongle.
    (the link above does not take buildings and trees into account)
    (think of the ADS-B 1090 MHz signals like light, only goes in a straight line and a tree or builiding will block it)

  3. #13
    Passenger
    Join Date
    Jun 2019
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    37
    @wiedehopf,

    thanks again for your patient and advice.

    I checked the site you suggested and was suprised vy the results. But there is a building to be seen, so I will never reach the maximum range.
    According to the stats in Flightradar, my average is 62nm. And a maximum of 212nm. For today the max range is 152nm.

    Yes I can drill a small hole so I can get the antenna cable outside.
    If I post a picture of my balcony and I hint where I think I could attach an antenna would that be an idea, so you gurus could even give me a better advice?

  4. #14
    Captain
    Join Date
    Apr 2018
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    619
    It shouldn't matter much where you put the antenna. A few cm above the railing will do fine.
    Just don't use a metal pole. Best would be a plastic pole, but a wooden pole would work too.
    (the pole is just to fix the mentioned antenna from ebay to the railing)

    As you don't get reception towards your building anyway the pole shouldn't hinder reception too much.

    I'm surprised you are allowed to drill an 10 mm hole into the wall
    Smaller and the SMA connector won't fit through.

    If you want maximum reception i'd recommend this LNA: https://rtl-sdr.com/new-product-rtl-...mhz-ads-b-lna/

    You could even connect it directly to the antenna and use UV and water proof tape and make a small cylinder going down from the antenna around the LNA.
    If the cable isn't longer than 3m then using the LNA indoors is probably just as good.

    The LNA needs power though, so you need an additional bias-t or a dongle with builtin bias-t.
    (https://www.rtl-sdr.com/buy-rtl-sdr-dvb-t-dongles/ it's the same page where you can buy the LNA)

    Good luck with your build

  5. #15
    Passenger
    Join Date
    Jun 2019
    Posts
    37
    Again, thank you for the fast reply.

    Will think about all the suggestions.
    About the hole, well sometimes it is better not to tell

    The place I was thinking about to place the antenna is , of course, a metal stand, but perhaps a wall constructions can do as well.

    Thanks again for all the help

  6. #16
    Captain
    Join Date
    Apr 2018
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    619
    As i said, the easiest would probably be to fix a broom stick to the railing of the balcony and then attach the antenna to that.

    Where and how you fix the broom stick doesn't matter

    Oh and you should get some UV resistant tape and wrap that around the bottom of the antenna and then the cable.
    That way the connection and bottom of the antenna doesn't get wet.

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