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    How it works: inaccuracies

    Dear FR24,
    I think I have noted some inaccuracies in https://www.flightradar24.com/how-it-works:

    §1 ADS-B: "The ADS-B transponder on aircraft transmits signal containing the location (and much...
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    The TV connectors are unsuitable for the 1GHz...

    The TV connectors are unsuitable for the 1GHz frequency. The ferrites will not work either at these high ranges.
    You sholud use a least MCX connectors.
  3. Running the DUMP1090 from a Raspi on an UMTS connection.

    Hi experts here,

    My potential data source is a DUMP1090 program running on a Raspi that has only an UMTS connection.
    Feeding to FR24 is no problem.

    I would however like to use the DUMP1090...
  4. Thread: My Cantennae

    by RIN67630
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    86,044

    By the way: just for fun I made a J-Pole TV...

    By the way: just for fun I made a J-Pole TV antenna for use with DVB-T tuned to 625MHz.

    It worked MUCH better than my amplified Terratec indoor antenna that I used to use previously.
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    I currently have both building sides running and...

    I currently have both building sides running and online. My range stats increased.
    Previously I had a range from Amsterdam to Frankfurt, now I have Brussels and Luxemburg as well.
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    Be aware of the fact that good old SO-239&PL-259...

    Be aware of the fact that good old SO-239&PL-259 connectors got the name "UHF connector" around last world war time.
    At that time 30MHz was "UHF"!
    This connector is absolutely not suitable for GHz...
  7. Replies
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    Sticky: Here is my new construction for a friend: The...

    Here is my new construction for a friend:
    The Jpole construction:
    7349
    The antenna with the PVC boom:
    7350
    The receiver, Raspi and power supply:
    7351
    The almost finished unit:
    7352
  8. Replies
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    114,307

    With RF environment I meant TV senders, GSM...

    With RF environment I meant TV senders, GSM towers, Police, Firestation, Taxis etc... all those who are emitting unwanted signals.

    Hmm... Your wife should not be ignored.
    She will probably hate...
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    Sticky: Regarding that question the answer should be...

    Regarding that question the answer should be easy:
    look at http://jollain.com/FR24/stats.php
    Nearly nobody cracks the 325 miles, almost everybody in the top ten is pretty exactly in that range.
    So...
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    Are you sure you need an amplifier? What RF...

    Are you sure you need an amplifier?
    What RF sources are around you? The USB DVB-T has got plenty of amplification, but no inbound filter.
    If you are in a RF-noisy environment, which is in cities...
  11. Thread: My Cantennae

    by RIN67630
    Replies
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    86,044

    You are at the wrong place. Not the "options"...

    You are at the wrong place.
    Not the "options" from the menu, but three lines below the "receiver range", just above "shortcuts".
  12. Thread: My Cantennae

    by RIN67630
    Replies
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    86,044

    it is the fourth line of the menu It has a...

    it is the fourth line of the menu It has a submenu and you indicate first all altitudes or something like that (I have a German menu here)
  13. Thread: My Cantennae

    by RIN67630
    Replies
    52
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    86,044

    If you enter your receiver location in the...

    If you enter your receiver location in the tools/options of Virtual Radar and activate the receiver range in the menü of the VR web page, you will get the plot overlay onto your map.
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    That one woud do the job perfectly:...

    That one woud do the job perfectly:
    http://www.ebay.de/itm/272182639014
    I have one working, it not only transforms the WiFi signal to RJ45, but also extends the WiFi range.
  15. Thread: My Cantennae

    by RIN67630
    Replies
    52
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    86,044

    The plural for cantenna should be cantennas. I...

    The plural for cantenna should be cantennas.
    I strongly doubt, that this is a Latin word ;-)))
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    You know, it's just a Pi. Potential hackers won't...

    You know, it's just a Pi. Potential hackers won't get into your bank account with it, not even in your (not existing) mailbox there.
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    My words. The Jpole is the easiest. It fits in a...

    My words. The Jpole is the easiest. It fits in a piece of 16mm PVC tube.
    Forget amplifiers, forget expensive coax cables and connectors, adapters etc...

    The trick is to use the short stock cable...
  18. Thank you for that info. separating the USB ports...

    Thank you for that info. separating the USB ports is a brilliant idea.
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    Maybe, but why? Port 30003 with format...

    Maybe, but why?

    Port 30003 with format Basestation fed from DUMP1090 works well on VRS.
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    The remote Pi will issue a public feed on ports...

    The remote Pi will issue a public feed on ports 30002, TCP and ports 30003, TCP if you have selected the DUMP1090 argument --net during the FR24 install.
    Tht's all you need.
    If you use a free...
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    @oblivian: The FR24 website has changed. I...

    @oblivian:

    The FR24 website has changed.
    I also was irritated when I clicked on something like "get business for free as a feeder". The first think that happened was to throw me back to basic...
  22. The B+ is just fine. If you use a good WLAN...

    The B+ is just fine. If you use a good WLAN stick, you will get much more WLAN range that from the Pi3 for which you can't extend the range with an antenna.

    For FR24 the Pi B+ needs between 2 and...
  23. Dear Keith, The collinear might be dangerous, in...

    Dear Keith,
    The collinear might be dangerous, in the worst case you get close to 1/4λ of 147MHz.

    If i were you, i'd prefer the J-pole antenna.
    Here ist the detail view of the balun und the coax...
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    The FR24 install includes and needs the DUMP1090...

    The FR24 install includes and needs the DUMP1090 software. That later makes the analysis of the signal and provides a feeed that is used by FR24 software to forward to their own servers.
    If during...
  25. If you have a that sender in the vicinity, I...

    If you have a that sender in the vicinity, I really would strongly recommend the 1090 filter. The RTL stick easily saturates since it has absolutely no built-in RF tuning stage.
    If I were you, I...
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