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Type: Posts; User: jackthom

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  1. Replies
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    I’m still very happy at the moment with the...

    I’m still very happy at the moment with the package of Dump1090 1.15 which includes the performance graphs, as scripted by J Prochazka.
    However I just got hold of another rpi 3b+ so I am now tempted...
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    Thank you very much for that. I'd completely...

    Thank you very much for that.

    I'd completely forgotten that FR24feed does not start dump-1090 in this case and a quick dpkg-reconfigure is now actually changing the gain.

    I'll remove the...
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    I'm using Dump1090 1.15~dev and I did wonder why...

    I'm using Dump1090 1.15~dev and I did wonder why dropping the original gain setting of 49.6 down gradually to zero didn't really seem to be having the expected effect.

    The LNA allegedly provides...
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    Yes in my case the overhead signals are always...

    Yes in my case the overhead signals are always rock solid.

    It’s the low level aircraft taking off a couple of miles away which would be liable to overload if I try to improve the sensitivity and...
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    Dynamic Range improvement.

    For some time I’ve been using a discone antenna a few metres above the house roof with around 15m of good quality coax feeding a Pro Stick Plus with reasonable but not great results.
    I recently...
  6. The cable supplied with the Jetvision antenna...

    The cable supplied with the Jetvision antenna appears to be of reasonable quality so I'm not sure changing it would help.
    http://www.bieffecavi.com/pdf/CO100AFeng

    The dish LNB will be supplying...
  7. That's an interesting one. Assuming you can't...

    That's an interesting one.
    Assuming you can't slightly increase the separation between the cables or re-route one of them the only thing I can suggest is, after checking what cable types are in...
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    As you can see the log file gets big very...

    As you can see the log file gets big very quickly.
    As I understand it the log file rotation doesn’t work properly and it’s probably best to disable the logging when you are happy that your system...
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    /var/log/fr24feed is now the default location for...

    /var/log/fr24feed is now the default location for the log file so I’d stick with that.

    I use Win32DiscImager to write SD card images and this has the option to read the SD card contents and save...
  10. Thread: Water ingress

    by jackthom
    Replies
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    7,226

    That probably explains why you are content, or is...

    That probably explains why you are content, or is it resigned, to experiment with antennas placed by the window.

    I feel I just have to get them up on the roof to make the most of the limited...
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    Check the sd card is fully home in it's slot. If...

    Check the sd card is fully home in it's slot. If reseating it doesn't help the file system on the card may be corrupted.
    ...
  12. Thread: Water ingress

    by jackthom
    Replies
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    7,226

    That seems a bit harsh but I suppose they have to...

    That seems a bit harsh but I suppose they have to avoid large numbers of residents wanting their own antennas/dishes for various uses.
    Is you apartment high up near the top of the block?
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    Not sure your directories are correct, try ...

    Not sure your directories are correct, try

    cat /var/log/fr24feed/fr24feed.log
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    If you can still get the FR24 status webpage...

    If you can still get the FR24 status webpage select "settings" and choose from the dropdown options for "Logfile mode"
    Then click "save" followed by "restart"
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    I haven’t tried those myself but really enjoyed...

    I haven’t tried those myself but really enjoyed reading the cantenna/spider thread.
    I did build a coaxial cable colinear which was working very well, until the self amalgamating tape at the base...
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    You don't say what sort of aerial is in use and...

    You don't say what sort of aerial is in use and whether it is mounted high up "in the clear".

    A colinear antenna for example would have much higher gain closer to the horizontal and provided it's...
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    LNA working perfectly with bias tee, thank you...

    LNA working perfectly with bias tee, thank you again abcd567. :cool:
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    Yes thanks abcd567, wish I'd tried it earlier. ...

    Yes thanks abcd567, wish I'd tried it earlier.

    I only began experimenting with 1.15~dev a few days ago and it did solve the problem plus it's possible it has also improved the number of...
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    Hi, it arrived yesterday and all I can say for...

    Hi, it arrived yesterday and all I can say for definite is that it didn't cure the problem I had with RSSI readings which I've now put down to a Dump1090-mutability 1.14 software oddity.

    The...
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    I have a setup using dump1090-mutability 1.15...

    I have a setup using dump1090-mutability 1.15 which is not started by fr24feed (I can't get it to take control) and has to be set to start at boot...


    sudo nano /etc/default/dump1090-mutability...
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    Just an update on the original problem which...

    Just an update on the original problem which wasn't fixed by the RTL-SDR 1090 LNA/filter.

    I have set up an alternative Raspberry Pi 3B+ rig, this time using "dump1090-mutability_1.15~dev"....
  22. Thread: FR24 radar

    by jackthom
    Replies
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    On a similar theme does the database/website...

    On a similar theme does the database/website server receive information about the signal strength (or RSSI) of each transmission from dump1090 and does this assist in determining which receiver is...
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    I'm afraid that's right. If anything the FA...

    I'm afraid that's right. If anything the FA filter caused the number of messages/sec to fall a little rather than improving things, presumably because of its ~2db insertion loss.

    I already ordered...
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    I tried taking the gain down to 10 initially and...

    I tried taking the gain down to 10 initially and the range and number of messages per second both took a nosedive, as might be expected.

    Increasing the gain gradually up to max gave an improvement...
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    Gain is set to max at present. I did try a few...

    Gain is set to max at present. I did try a few different lower settings by editing the entry in the Dump1090-mutability configuration file but I prefer the idea of using the extra arguments field in...
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