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Type: Posts; User: wiedehopf

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  1. Replies
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    Well you connect the external bias-t to wires...

    Well you connect the external bias-t to wires anyway.
    (granted you can buy some that take a USB cable input)

    One of the wires you instead connect to the resistor and other end of the resistor to...
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    The rtl-sdr LNA has filters integrated, no need...

    The rtl-sdr LNA has filters integrated, no need for extra filtering.

    Power is supplied via the coax. (bias-t)

    They even link a bias-t on their product page:...
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    You can't run FR24 MLAT twice on the same device....

    You can't run FR24 MLAT twice on the same device.
    The 8754 webpage will only work once.

    So it's possible, but annoying.
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    You'll need to install via the script, the pi24...

    You'll need to install via the script, the pi24 image will not work.

    Use Raspbian Buster Lite as a base, you'll have to figure out how to enable ssh if you want that.
    There is a lot of...
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    It's not resistance, it's impedance. Going from...

    It's not resistance, it's impedance.
    Going from one impedance to a different impedance creates some attenuation.

    It's very common to use 1/4 ground plane antennas or 1/2 wave dipole antennas....
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    1/4 wave is the closest to 50 Ohm impedance. ...

    1/4 wave is the closest to 50 Ohm impedance.

    Full or half wave ground plane antennas would need impedance matching to work well.

    From practical experience: You'll need a whip a bit shorter than...
  7. Think you forgot probably one of the most...

    Think you forgot probably one of the most important aspects: Antenna location / location.
  8. I won't add links to FR24, just type in the call...

    I won't add links to FR24, just type in the call sign or tail number, it's simple enough.
    (also linking to FR24 only works by tail number, not by callsign and you don't end up on the live map)
    ...
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    Yeah making the discone more like a spider...

    Yeah making the discone more like a spider antenna will probably help.

    The signal spread in the graphs can be low because of noise for example.
    Or there may just not be enough signal left at the...
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    If you run uat2esnt or somehow generate...

    If you run uat2esnt or somehow generate artificial ADS-B messages from UAT messages to feed them to fr24feed, that would probably work.

    But i have no clue if FR24 wants such data.
    They probably...
  11. Why don't you just test if you can see a...

    Why don't you just test if you can see a difference?
    Might be better to leave it off if you are using a VM, might be some USB problems which make MLAT go bad.

    So just leave it off.
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    The filter only comes after the internal LNA,...

    The filter only comes after the internal LNA, which is often too late.
    With a discone i suspect the internal LNA will get overloaded and produce noise on all frequencies.

    But obviously it's also...
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    Get yourself some filtering and amplification:...

    Get yourself some filtering and amplification: https://www.rtl-sdr.com/new-product-rtl-sdr-blog-1090-mhz-ads-b-lna/

    Then you can use your old coax (with the amplifier close to the antenna).
    The...
  14. Why do you ask, it's all been explained. ...

    Why do you ask, it's all been explained.

    Install it if you wish or don't install it, i don't care!
    Yes it'll work with dump1090-fa, that's what it's made for.
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    I'd much recommend not using those bloated graphs...

    I'd much recommend not using those bloated graphs that use php and what-not.

    Use these:
    https://forum.flightradar24.com/threads/12839-Useful-Addons-graphs1090-tar1090-et-cetera


    The...
  16. tar1090 is just an improved webinterface for...

    tar1090 is just an improved webinterface for dump1090-fa.

    It should install without problems using the supplied install script: https://github.com/wiedehopf/tar1090#tar1090

    Original interface...
  17. I'm not sure how much CPU that NAS has, but i...

    I'm not sure how much CPU that NAS has, but i would expect it to be quite a bit more than the RPi.
    Don't know how good it can do virtualization of course.
  18. You really want some graphs if you're gonna do...

    You really want some graphs if you're gonna do antenna optimization.
    Even aren't a problem CPU wise on the RPi, so it really shouldn't be a problem on your 64bit PC:...
  19. CPU use for the webinterface is minimal, that...

    CPU use for the webinterface is minimal, that even includes my webinterface which does a minimal amount of extra work.
    I really don't think you could even measure the CPU load difference when you...
  20. If you don't want to look at it, you can just...

    If you don't want to look at it, you can just install dump1090-mutability via apt-get on Debian Buster, there is a package available.

    The demodulation of the messages that go to fr24feed hasn't...
  21. dump1090-fa is not provided as a package for...

    dump1090-fa is not provided as a package for architectures other than armhf.

    If he doesn't like the FA links, he can install this :) https://github.com/wiedehopf/tar1090#tar1090
  22. I wouln't follow any recipe. Just install the...

    I wouln't follow any recipe.

    Just install the dump1090-fa .deb package you just compiled and then you can run my script for configuration and cleanup of other dump1090 packages you might have:...
  23. He's talking about the folder being empty when...

    He's talking about the folder being empty when cloning dump1090-mutability: https://github.com/mutability/dump1090
    If you want to use that you can still do it, just need to check out the v1.15-dev...
  24. If you want to use the armhf binary (most current...

    If you want to use the armhf binary (most current version), then you will need to use the Raspbian Desktop image (it's for x86/amd64 computers), it has some sort of emulation built in for armhf...
  25. If you are using dump1090, use beast-tcp like...

    If you are using dump1090, use beast-tcp like this:



    receiver="beast-tcp"
    fr24key="xxxxxxxxxxxxxxxx"
    host="127.0.0.1:30005"
    bs="no"
    raw="no"
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