EU1KY Antenna analyzer with STM32F7Disco (DH1AKF mods)

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

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  1. WA2T

    WA2T Ham Member QRZ Page

    Do you have the ferrite core on the measurement coax and shield soldered to PCB ground before the ferrite?

    73,

    Robert, WA2T
     
  2. DH1AKF

    DH1AKF Ham Member QRZ Page

    You will need a metallic enclosure.
     
  3. BH1JUS

    BH1JUS QRZ Member

    to:WA2T
    Has a ferrite ring and is grounded,thank you
     
  4. BH1JUS

    BH1JUS QRZ Member

  5. BEPHON

    BEPHON QRZ Member

    hello H1AKF,
    How can I get the latest firmware?
    thanks!
    Bephon
     
  6. DH1AKF

    DH1AKF Ham Member QRZ Page

    BEPHON likes this.
  7. BEPHON

    BEPHON QRZ Member

    Hello DH1AKF,
    Sorry for lossing "D".
    Thanks very much for the reply.I will read it seriously.
    BePHon
     
  8. BEPHON

    BEPHON QRZ Member

    Hi DH1AKF,
    The DSP signal magnitude cannot be tune down into the suggest range. So i have a question: which kind of wire would be better to connect the RF front board and the audio input port, twisted pair,shieldwire, or the normal cable?
    Thanks!
    BePHon。
     
  9. DH1AKF

    DH1AKF Ham Member QRZ Page

    1) Transformer
    Even Juri Kuchura (EU1KY) did not provide more precise information on the core. I used cores from an old VGA cable, µ about 800nH/w². 4 turns 50 Ohm Teflon coax.
    2) Audio connection: shielded, some people took two separate thin coax cables.
     
    BEPHON likes this.
  10. BEPHON

    BEPHON QRZ Member

    Thanks! I will try the two separate coax lines method.
     

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