EU1KY Antenna analyzer with STM32F7Disco (DH1AKF mods)

Discussion in 'Homebrew and Kit Projects' started by DH1AKF, Jan 10, 2018.

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  1. EI8DRB

    EI8DRB Ham Member QRZ Page

    Thanks for the reply Wolfgang. I will give it a try.
  2. KC4UJN

    KC4UJN Ham Member QRZ Page

    Is there an English version of the documentation for the DH1AKF firmware available?
  3. DH1AKF

    DH1AKF Ham Member QRZ Page

  4. VK2IHL

    VK2IHL Ham Member QRZ Page

    856FB5C3-A60D-492B-A424-549F55838AF5.jpeg 99732DB5-3C84-45A0-9C1C-71083393E5D1.jpeg Thanks DH1AKF and EU1KY
    Fantastic project and documentation.
    The only problem I got and fixed, is the Disco board with JP2 shorted to ground!!!
    73 de VK2IHL
  5. DH1AKF

    DH1AKF Ham Member QRZ Page

  6. N8OHU

    N8OHU Ham Member QRZ Page

    I'm considering one of these for my next project.
  7. BH1JUS

    BH1JUS QRZ Member

    Hello, I am from China. Please forgive me for not knowing English. I used Google Translator. Now I have some questions to ask you.

    I've always been interested in the EU1KY antenna analyzer, but I hope to measure 144MHZ-450MHZ. I don't know if it can be achieved. Thank you.
  8. BH1JUS

    BH1JUS QRZ Member

    By the way, does your firmware support EU1KY_AA_V3 version of PCB circuit board? My English reading ability is poor, so I am confused! Thank you
  9. DH1AKF

    DH1AKF Ham Member QRZ Page

    Hello BH1JUS!
    The oscillator reaches 230 .. 250 MHz. We use the 3. harmonic and reach 690 .. 750 MHz. Even the 5. harmonic is usable, and we can achieve 1450 MHz. The trick is, that we use two oscillator outputs with a constant frequency difference. After mixing the processor computes a 10 kHz difference signal and with FFT and a lot of mathematics the R and X components are calculated.
    PCB is in the current version "EU1KY AA V3".
    Please look at my homepage for some details:
    73, Wolfgang
  10. BH1JUS

    BH1JUS QRZ Member

    Hello, thank you very much for your timely and enthusiastic reply, so I understand that using the original PCB circuit board of EU1KY, writing to your firmware can reach 750 MHz or even 1450 MHz range, right? Do you want to modify the original PCB design?

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