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  1. Maksim Bartoshyk

    I created my own version 90 cm in diameter and some random ferrite ring. Works best in range 5 – 14 MHz with rtl-sdr v3 and another direct sampling rtlsdr stick that I have. Also shows decent performance in MW and I see some station in LW (but v3 is not as good as another dongle without bias-tee circuit). LW/MW performance could be boosted with resonance antenna (loop of the same 90 cm diameter and variable capacitor). I used lan cable to build MW/LW loops (it has 8 wires and available in almost any store). For MW 12 turns of single wire from lan cable, for LW 32 turns (but 40 should go to lower frequency, or you may have to use slight larger capacitor), small 20-320 pF capacitor from old cheap radio. You could get approximate calculation here – https://earmark.net/gesr/loop/joe_carr_calc.htm though it works for square loops.

    Just put diy youloop near resonant loop, tune to desired frequency and get SNR boost for 6-12 dB.
    Also noticed that VHF lna not stated for those frequencies may boost snr up to 4-6 dB as well, so with LNA and resonant loop v3 could receive something on LW.

  2. Charlie H

    The technical details are good here, but one thing that is absent is the massive price difference on some of these options. We’re ranging $25 to $1200 radios here.

  3. Robet

    Will this be as good on the SDRPlay RSP1A? I know it’s made for AirSpy SDR’s, but I have an RSP1A.

  4. Anonymous

    Hopefully frequency field gets more decimal places, now it has three … you can enter e.g. 434.562 but not 434.5625.

    • moneriomaa

      Hi
      i updated this on v1.5.4 and now you can enter e.g. 434.05625
      and note that Fs is 10240000 and this fft resolution is 4096 so you get 1024000/4096 = 256 Hz resolution
      adding more precision (5 or 6 floating digit) currently is not useful

    • Paul

      Peter, Thanks for your response. When I try to run nanovna-saver-v0.2.2-1.exe in cmd window I am getting the following message:
      C:\User\Admin>nanovna-saver-v0.2.2-1.exe
      Traceback (most recent call last):
      File “nanovna-saver.py”, line 17, in
      File “c:\user\ieuser\appdata\local\programs\python\python37-32\lib\site- packages\PyInstaller\loader\pyimod03_importers.py”, line 627, in exec_module
      File “NanoVNASaver\_main_.py”, line 21, in
      ImportError: Dll load failed: The specified module could not be found.
      [376] Failed to execute script nanova-saver
      =================================
      Have you had the same error message or something else?

      • Peter Kirk

        Paul, probably the driver signature issue causing the python script to fail.

        1) Connect your nanoVNA to the usb port and make sure the nanoVNA is turned on.
        2) Windows should generate a sound if it detects the presence of your device (you may see a driver msg in lower right of screen)
        3) Open your system device manager and check for a driver error in the PORTS (COM & LPT)
        or under VIRTUAL COM PORTS
        4) If you see the following driver error: STMicroelectronics Virtual COM PORT, then you probably need to sign the usbser.sys driver as per my previous post. (make a back up a copy of the original usbser.sys for piece of mind)
        cheers

        • Paul

          Device manager shows the PORTS (COM & LPT) and STMicroelectronics Virtual COM PORT with No error message (“This device is working properly”).
          The error message I quoted in my previous message appears regardless I have Nano-VNA connected or not to PC…
          I asked a friend of mine who does not have Nano-VNA meter but has win 7 (64bit) installed on his PC to downloaded and run nanovna-saver-v0.2.2-1.exe. And he was successful. So maybe there is something wrong with Win 7 config on my PC?

  5. Dan Ford

    Why would anybody trust rot star when they direct users to a harmful site, then endorse software that’s infected. Tried to run Artemis, infected by malware reported.

  6. Keith

    Where can I find a schematic or circuit description for this board? Is it open-sourced, or proprietary? May I use it in a commercial product?

    • scancaster

      Exactly! If you want me to use it then you best have Linux drivers! I don’t use wincrapper… have not in decades have no plans to any time in the future, or ever!

      I betting delivering drivers for Linux would probably offend their drive for $$$$$ as they would either have to provide it in source form, which may reveal FAKE ops! OR Crappy code OR BOTH… And if they choose to release only a binary format driver the Linux uber zealots will flip out on them over a binary only release. I personally don’t care about binary only drivers… source code is not the #1 driver in my use of Linux. Never has, never will be.

      • Gotcha

        True. Besides Noise Figure is Noise Figure no matter what operating system you use. No amount of decimation, IF filtering or smoke and mirrors can make a crappy Noise Figure better. So those comments about non-optimised Linux drivers are just obfuscating bullshit.

  7. Mario

    SWLingPost to me is the ultimate source of up-to-the-minute news and information on shortwave listening.

    Loops are especially helpful to those with limited space and perform very well for their size. Adding a rotator increases their usefulness. I don’t have that particular loop but mine is an excellent performer on long- and medium wave. As for HF reception it is on par with my 31 foot vertical. Try one, you may like it.

    Thanks Thomas for the great work and thanks Carl for posting.

  8. PH3V

    Great comparison! Many Tnx Alexandru Csete (@csete).
    My experiance as well …. LimeSDr is a total piece of crap! Noisy. Touch sensitive.
    When you touch it it drifts like a feather in the wind.

  9. David Pickering

    I had missing Winpcap, then missing faad2_ something, then missing QT platform. What a load of cr4p this is. Why oh why can whoever it was post complete installation package and on Linux but not on Windoze? I spent all damn night downloading QT form qt.io only to find its the wrong package and no one will tell me which one I need. Not even QT.io who are faceless wonders, (yet another unprofessional bunch of half-wits who hide behind webforms) can answer my question. I posted my answers after looking through the discussions on Dream’s site and seeing other folk have same problem and no one answering except some “clever” chap who spouts lots of rubbish about re-compiling. The idea of this app in this context was I believe, to allow the demodulation of DRM on HF for listeners using a RTL-SDR. NOT to start many year-long courses on learning how to code! I will be dead by the time I manage to find out how to make this work! So please, this is a strong, polite message to you exceptionally gifted programmers making these lovely apps, please compile them with ALL the extra files we need or at least maintain links to them and instructions on how to make it work. Remember, you may have to ask me if you want to know how to design an aerial and I’ll tell you but I won’t make you suffer wondering where I got that special metal bracket from and that it needs a degree at NASA to go in a rocket to the moon.

  10. dave

    I did all that with a cheap windows tablet and a dongle. Why build all that? I also had inmarsat fleer safety decoder.

  11. moneriomaa

    one people on forum said that with avast virus scanning, received “idp.ares.generic virus detected”
    i searched and find this link about some reason for this mistake on detection
    maybe useful for some one that use AVG and Avast antivirus software.
    link:

  12. Eleftherios Kosmas

    Greetings,

    Libre Space Foundation engineers are still reviewing the document and will further publish their results after a full technical review, which is not yet finalized. Results are bound to change.

    Eleftherios Kosmas, on behalf of the Libre Space Foundation board.

    • Anonymous

      Do you fancy testing a few more boards? I might be able to loan you a LimeSDR USB, Airspy HF+ Discovery and Nooelec SDR.

  13. Brian H.

    I will definitely be giving one of these a try soon. I live in an apartment building on the top floor and can’t put anything outside (I don’t even have a patio) so this will hopefully be better than what I’ve been using which isn’t much more than a longwire running across my ceiling. The price is right so it’s definitely worth giving it a shot.

  14. Nick

    Hi,

    I would like to use SDR# with an antenna requiring power supply, so I wonder if there is a way in SDR# to enable BIAS-T.

    Thanks,

    73!
    Nick – LZ1ZM

  15. Alex

    Hello,
    the RTL-SDR Blog Magnetic Whip Set (Great for KerberosSDR) works with R820T2 RTL2832U 1PPM or need different antenna?
    Thanks in advance

  16. landry telliez

    Hello,

    I just tested the pocsag in the 466Mhz awesome reception 512 Bits on the other hand I realized that the frequencies of the firefighters are at 1200 Bits and the function is not activated a solution will be found for the 1200 Bits ???

    • moneriomaa

      it must works for pocsag 512,1200 and 2400 bits, did you test for 1200 Bits and no detection?
      i tested it for multi bitrate and messages detected, you can help for better improvement with recording I/Q
      by sdrsharp and give it to me for further review

  17. Ronen

    The Software is only for 64 bit it would be nice to have a 32 bit version
    also a PPM frequency compensation parameter for the dongle would help to tune to the correct frequency

  18. Tom Risar

    PDM “Feature>>>Interface/volume…” I click on volume… and interface drop down goes away. No access.
    I can’t proceed further than step 2 under the “Decoding Via the Sound card”

    VBaudio pipe installed and showing up in win audio settings and bounces the PDM signal needle 2% span.
    Win 10 pro 1909 64
    RTL-SDR dongle, the silver one.
    Sdr# Works well
    PDM 3.1Full

    Anyone out there know what I’m doing wrong?

  19. Stu C

    I made my own out of aluminium tube and am currently testing with an RSP1A (+in-line amp), positively surprised at the reception.
    I think they do need to build a dedicated LNA into the head that can be powered via coax. The cheap LNA I am using is OK but needs 12V so that is another lead that needs to go somewhere and is a potential source of noise. I’d also like someone to do some BALUN ratio tests as I tried a couple but could not really measure the full affect.

  20. JOHN McM.

    I hope this doesn’t sound too dumb but I have not found a Win 10 version of TAR1090. I have dump1090.exe and it works on win 10. Is there a Win version of tar1090?

  21. Genia B

    Hi there,

    I am trying to set up a working TEMPEST attack as a demo for my employer, but I have been having issues getting this to work. I made sure I have 32-bit java (though I am using a 64-bit Windows 10 machine). I installed mingw and msys, though I don’t think I’ll need them, as I already have a working jar file.

    When I try to load the ExtIO dll, I get:

    “The ExtIO dll is not compatible with the current machine or does not exist. Please check the filename is correct and the file is a valid ExtIO and try again.”

    Any advice would be most helpful and appreciated. I am at the point of trying a different dongle (like an RTL2832U), but I fear I will just end up with the same error. What am I doing wrong? The software is indeed finicky and confusing, as you pointed out in your YouTube video 😊 I looked at that video, but it didn’t help me, unfortunately. I tried placing the jar file and the required dll into separate folders on my desktop, but I get the same error.

    Many thanks in advice for any help.

    Warm regards,

    Genia