jks

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jks
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  • v1.809

    From the CHANGE_LOG file:

    v1.809 April 5, 2025

      The output from my.kiwisdr.com has been expanded to include additional information:

        Proxy links in addition to local IP links if proxy mode is setup and running.

        Connection type & status (i.e. settings on admin page "connect" tab).

        Kiwi and Debian software versions.

        Kiwi product model and Beagle type.

        The Debian hostname is shown after the serial number if it has been customized from the

          default "kiwisdr". Useful if you have multiple Kiwi on your network and you want to

          distinguish them by name instead of solely by serial number.

       

      Admin network tab has new field "Debian hostname" to complement the my.kiwisdr.com change above.

        This changes the actual Linux hostname and is not just a Kiwi configuration parameter.


      DX label fixes (desktop):

        When an extension is open, and you click on a dx label specified to open the same named

        extension, the extension won't get closed and re-opened. Instead, any new extension

        parameters contained in the dx label are sent directly to the open extension for

        further processing. Example: clicking on a different LF time station causes the

        timecode extension to change its decoding setup.

           

        Label only turns magenta (indicting extension will be opened on click) when mousing over

        label _without_ a modifier key pressed (shift etc). For example shift-clicking a label

        opens the label edit panel. So it doesn't make sense to be turning the label magenta

        because an extension isn't going to be opened when you click it.

           

        The DX help panel is opened if the cursor is in the label area and "h" or "?" pressed.

         

        The stored DX database can now have a custom name, 15 chars max. (thanks Mauno WRTH)

        Change the first line of the dx.json file from:

          {"dx":[

        to:

          {"my-custom-name":[

        If this is of interest you presumably already have a custom dx.json file you're loading

        via the admin DX tab "import JSON" button. If not, just use the "export JSON" button

        to download a copy of dx.json and use a text editor to make your changes.

        The custom name will appear in all the usual places: The left end of the frequency

        scale, the various database selection menus, etc.

       

      When frequency scale offset is in use (i.e. using a downconverter) fixed broken behavior of:

        "VFO A/B" button. (thanks F5AFY)

        "Zoom-to-band" button.

        "--- +++" buttons when frequency scale offset was not a multiple of 1 kHz.

       

      S-meter URL query: Allow optional mode e.g. my_kiwi:8073/s-meter?14200usb (thanks F5AFY)

      Prevent Beagle LED control conflict when admin backup function running. (thanks F5AFY)

      Save/restore waterfall timestamp parameters in browser storage. (thanks nitroengine)

       

      Removed debugging print causing lots of "AJAX_STATUS ..." messages in admin log when

        wsprdaemon or similar application are in use. (thanks DL4ZBE)

         

      Admin local blacklist now disallows entry of subnets which would otherwise exclude local

        network addresses or the loopback IP address. (thanks G2YT)

       

      When the "device preset" menu of the "Mouse wheel / trackpad setup" section of the user tab

        is set to anything except "custom" the three fields below are disabled for input.

        Although they still show what the preset values are. (thanks ZL2P)


    nitroenginestudentkraHB9TMCF5AFYG8JNJG4ZFE
  • Waterfall timestamp setting saved in cookies or browser storage [fixed in v1.809]

    Fixed in v1.809. The timestamp menu setting, including any custom value, and URL/local menu setting will be saved in browser storage.

    Also, the complete list of URL parameters is here: http://kiwisdr.com/info/#id-user-tune

    HB9TMCnitroengine
  • 66.666 MHz TCXO for KiwiSDR. Jamming/spoofing GNSS.

    Thinking about this some more (because I can't help myself). Higher frequency time stations are more useful because there is more relative frequency offset to visualize. At least when doing a manual calibration and you need to "eyeball" the offset in the waterfall (zoomed all the way in).

    But HF time signals are more prone to having junk carriers close to the time station carrier (I've seen this) compared to LF time signals. But the later are not always present depending on antenna and Kiwi location. Hence the good SNR requirement mentioned by @nitroengine.

    One thing we do have I remember now is the audio PLL associated with the SAM mode. So if SAM is able to achIeve a lock the exact offset can be determined rather than derived from, say, the number of waterfall bins which at z14 is only 1.76 Hz/bin (1.8 kHz span / 1024 bins). This is why the manual calibration instructions say to use the IQ extension for the ultimate fine tuning of the calibration.

    Also needed is probably the more difficult part: Analysis of several different time signals at different frequencies and some sort of voting logic before there can be confidence in a solution.

    nitroenginedl7awl
  • Tech Minds YouTube review questions #5

    Questions from the Tech Minds YouTube review:

    What would it take for this device in order to extend its range down to 1 kHz or even DC? I'm trying to monitor dirty electricity coming off my house's electrical wiring.

    You should consider an active probe or magnetic loop feeding into a sound card for that kind of thing. The right kind of amplification/matching between the two will be needed. Then run one of the sound card SDR programs to get a spectrum.

    The Kiwi receives signals down to 10 kHz (when the Russian Alpha navigation system is active, see: rsdn-20-beacons-reactivated) And has some sensitivity to 7 kHz. And I've seen some Kiwi VLF spectrums where you can clearly see 60 Hz harmonics above 10 kHz. It's quite amazing I think.


    One question: if using on my home network, would there be the same latency as with online KiwiSDRs? I find that any I've used online have a delay of about a second or more between clicking on/selecting something and it actually happening. I'd find this annoying if using locally.

    This is not documented, because it can cause more problems than it solves, but try adding to the URL: ?abuf=0.25 (or perhaps ?abuf=0.5 if you're getting audio drops as a result of having too little buffering). So something like my_kiwi:8073?abuf=0.25 or if you're using other URL parameters like f= my_kiwi:8073?f=7150usb&abuf=0.25 The abuf (audio buffer) parameter is specified in seconds and applies to the current connection only.


    Question from a user: if I listen via PC everything works fine. If I go to the link with my Android smartphone this appears: Unable to reach the site. Why? Other.. KIWI sdr app is not available for my device

    Don't know why your Android smartphones wouldn't be able to connect. I use Android tablets here to verify Android functionality.

    The old KiwiSDR app for Android was removed from the Android store, but I saved a copy. See this thread: https://forum.kiwisdr.com/index.php?p=/discussion/comment/20578#Comment_20578


    ET ships aka UFOs seem to be standing wave EM energized on the hull, the small 10-15m scout craft likely have a main tone around 10MHz and complex harmonics up and down, all the way down to audio range and at least up to GHz. GHz might even be a dominant component. Try looking for it. Sightings suggest at least 200 sorties around the world every day and they might put out considerable power levels so should be detectable from 1000km+. Larger craft will have deeper tone presumably. It will be a strong signal that has no data. When close they sometimes emit a sound like an agitated bell, a bit like meditation vessels. Similar sound might be recognizable in RF as a beat frequency or something. No FM modulation of course since it's a side effect of the propulsion.

    It is a certainty that ET ships frequent our skies and there is strong evidence of EM and RF, only a question of how easy are they to detect. Coastal areas might be the most frequent as the regulars seem to have bases on earth, specifically in the continental shelf sea floor.

    Yes! Finally someone who understands!

    jimjackiinitroenginejolo22
  • Tech Minds YouTube review questions #4

    Questions from the Tech Minds YouTube review:

    Ok I'm not shore this question is sensible, but what is the point of the clock input? I would have thought that with both gps and ntp you would have plenty of clock sources.

    and

    What external clock frequency is needed?

    It's not needed, but optional. Some experimenters using Kiwi's where a very precise ADC clock is needed feed the EXT CLK input from a GPSDO (GPS disciplined oscillator) with much higher performance than the Kiwi's internal GPS-frequency-calibrated crystal oscillator.

    The EXT CLK connector also serves as a self-test output you can loop back into the RF IN connector to test if the Kiwi RF frontend is working properly.


    Hmm, the price is right, but i wonder... is the kiwi tweakable over SSH ?

    Yes. The admin page even has a "console" tab that will give you a shell connection (you can disable this entirely, or limit it to a specific IP address if necessary). If there is a problem with the Kiwi server not starting, or a mistake in a configuration file, you can ssh into the Kiwi directly and fix it. The Kiwi-2 runs Debian 11 currently. The configuration files are all JSON plain text. You can reinstall everything by re-cloning and not disrupt your configuration which is kept in a separate directory.


    I have an Airspy HF+ Discovery for VLF, HF and VHF, and an RTL-SDR for higher frequencies, accessible anywhere in the world via OpenWebRx+. Can anyone tell me how the KiwiSDR 2 is better? Serious question.

    Not better. Just different. The goal back in 2014 when it was designed was to not be "just another IQ generator" like all the other SDR's, then and since. It was to be a wide band unit like the Twente WebSDR, which was never released as any sort of commercial product. And self-contained requiring no external pc, with or without graphics card (Twente requires a GPU).

    Some people really like the fact you can view the entire 10 kHz - 30 MHz spectrum at one time. Lots of people like not having to install PC software and the associated nightmares. Other people like our level of support.

    Everyone is happy they have so many SDR purchase choices!

    jimjackiinitroenginejolo22