• Phase Locked Loop

    From UFO@21:1/5 to All on Mon Feb 17 08:47:10 2025
    Trying to understand how this PLL in a ham transciever works.

    https://www.mediafire.com/file_premium/sx3lig50i6eb2nq/PLL_UNIT.zip/file

    Its not locking unless you are near the higher range of the VFO input and
    spin the knob very fast, then it locks but only for a small amount of VFO
    freq
    change.

    There is a dual gate FET Q28 that is suppose to have 5Mc on each gate and
    the
    gate from Q26 IC chip is the one with the proper signal.

    I guess this is triggering the "unlock" / VCO -Off line to go active?

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