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KA7U

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KA7U
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  • Antenna Choices

    The W6LVP antenna running on http://ka7u.us.no-ip.org:8074 is doing almost as good a job as the 210' G5RV dipole. The dipole gets down to 15KHz whereas the W6LVP gets down to 60KHz. Generally the G5RV provides better S/N ratios up to 14MHz and the W6LVP does better above 14MHz. This is not a rule though, merely a perception based on observation since it has been up. At any given time either antenna might seem better than the other on a given frequency.

    The result for me is that the small footprint W6LVP Magnetic Loop provides almost as good a signal to the KiwiSDR as the very large footprint G5RV. In my mind this makes the W6LVP the more desirable antenna for aesthetic reasons and still provides excellent 60KHz through 30MHz reception.

    Nice little antenna.
    Ron
    KA7U
    WA2ZKD
  • Running KiwiSDR from a headless browser

    Peter,
    I have been working this out with Firefox in headless mode. The debug control takes developer tools. https://developer.mozilla.org/en-US/docs/Tools ; I have not installed them or tried them yet. The command line syntax is different, but the functions seem to be the same for the most part. Command line options are listed here. https://developer.mozilla.org/en-US/docs/Mozilla/Command_Line_Options

    Currently I'm uploading spots using this command line syntax from Linux on my Chromebook.
    (trusty)ron@localhost:~$ firefox/firefox -headless -new-tab "http://ka7u.no-ip.org:8074/?ext=wspr,mf&mute" -new-tab "http://ka7u.no-ip.org:8074/?ext=wspr,40m&mute"
    *** You are running in headless mode.

    As you can see it takes more command input than the Chrome commands, but it works fine. I checked and the spots are uploading for MF and 40M. It is running in the background and a CTRL-C from the command line kills the process.

    Thanks for showing how to do this.
    Ron
    KA7U
    VE3SUN