Leave your KIWISDR's photo and link URL here please

JIMMY0311JIMMY0311
in General Chat

I have no idea how many KIWISDRs (ver. 2016 by jks) have been released since 2016.

The purpose of this post is to call a collection from all over the world.

Leave your KIWISDR's photo and link URL here please

Comments

  • JIMMY0311JIMMY0311
    WeChat 圖片_20230916131600.jpg

    http://jjm0311.ddns.net:8073

    The picture includes a linear power supply, a pre-BPF, kiwisdR+Aluminum enclosure, and wifi hub. The fan was intendedly moved to the outside to reduce vibration.

  • WA2ZKDWA2ZKD


    image.png

    jimlill.com:8073 and jimlill.com:8075 are 2 of the 4 kiwisdr there. The other 2 are dedicated to wspr. I am currently suffering from some local noise that I haven't had time to chase.

  • TremolatTremolat
    edited September 17

    Hello,

    very good idea.

    Récepteur KiwiSDR de Trémolat, AutreRadioAutreCulture (Périgord, Dordogne, France).

    http://sdr.autreradioautreculture.com:8073

    Antenna mini-whip Dual Fet, stainless steel antenna mast 50 mm in diameter at 3.5 m in height, 50 meters of silver RG 58 coaxial cable.

    01_KiwiSDR_antenne.jpg

    Antenna filter.

    02_KiwiSDR_filtre_antenne.jpg

    52 meters from the antenna, the receiver box is placed in a technical bay (19", 27U); Schneider case in steel, not aluminum, it's important. TP Link ethernet switch (there are several other switches before reaching the Internet router, the network is large).

    03_KiwiSDR_rack.jpg

    Interior of the armored box. Bel 784-HAA 512-AG linear power supply, 5 Volts and 12-15 Volts. Mains filter (RFI TE Connectivity 3A-250V). 12V injector (double coil) for the active antenna. The ventilation grilles are behind the power supply (cannot be seen in the photo).

    04_KiwiSDR_box1.jpg

    Shielded, grounded cover.

    05_KiwiSDR_box2.jpg

    Behind the rack, the surge protector and the arrival of the earth connections at a central point.

    06_KiwiSDR_parafoudre.jpg

    Notes:

    • the mains power supply (230V + or - 1%) is produced by two OnLine Socamont inverters (2 x 6KW) and backed up by 2KWh of batteries. The wiring of the mains installation is carried out in "IT", without neutral. Several large sector filters are inserted (Schaffner FN2410H series).
    • During the day, the system runs on photovoltaic energy.
    07_solaire.jpg
    • the night sky of Trémolat
    08_Tremolat.jpg

    Best regard, Philippe

  • dl7awldl7awl
    edited September 17

    My provisional (solar-powered) experimental setup on a wooden board:

    Img_0166-klein.jpg

    Components:

    1. Kiwi in its original metal/plastic frame and with its unused GPIO lines led out (over series resistors) to a D-Sub socket.
    2. Homebrew 6-way antenna switch, controlled by the GPIO lines, and with the general 12V DC power supply input for the whole assembly.
    3. Shielded switching regulator 12V --> 5V with additional builtin chokes and pass-thru-capacitors for lowest possible interferences (kiwi sometimes shows SNR above 40 dB).
    4. Heavily modified ESP8266 Relay module, flashed with Tasmota firmware. Allows me to remotely turn the kiwi on; it can also measure temperature (DS18x20 Sensor) and the supply voltage via ESP's ADC input. With a simple self-written daemon interacting with the relay module, the kiwi can auto-turnoff itself if unused for more than, say, 4 hours. (I added a hardware turn-off-delay to the relay module, so the kiwi has enough time to properly shutdown after sending the "OFF"-command to the relay board.)

    As said, this was intended as a provisional test setup only, but is now already running for many years. Nothing is as durable as a temporary solution. ;-)

    No URL here, as this kiwi is still not publicly available.

    Regards,

    Manfred

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