Si5351A Swapped for a XTAL?

Discussion in 'Homebrew and Kit Projects' started by W0VRA, Sep 13, 2018.

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  1. W0VRA

    W0VRA Ham Member QRZ Page

    I noticed that the Kenwood TS-120S has slots for XTALS to basically use as memory channels.

    Could an Si5351A be substituted as a pseudo VFO using the crystal connections, maybe with QRP Labs ProgRock?

    I don't know if you'd actually gain anything by doing that, besides the improved frequency stability, right?

    Maybe you could trick it into doing 30 or 75 M, if the BPFs will let you get away with it?

    upload_2018-9-13_14-45-46.png upload_2018-9-13_14-46-15.png
  2. VK4HAT

    VK4HAT XML Subscriber QRZ Page

    You would have to measure the signal level at the OUT point of the crystal oscillator and inject a signal that is matched in amplitude and impedance at the same point. You cannot just plug it into the xtal socket.
    W0VRA likes this.
  3. W9GB

    W9GB Ham Member QRZ Page

    Working Kenwood TS-120 HF transceivers are being “disassembled” (Radio Chop Shops)
    and sold on eBay ... I have eatched three (3) units in past month. Why bother?
    W0VRA likes this.

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