Passive LCLC Supply ?

Forum Power supplies Passive LCLC Supply ?

  • This topic has 3 replies, 2 voices, and was last updated 1 month ago by The Well Audio.
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    • #2122
      multiblitz
      Participant

        Hi Andrea,

        I am still impressed how much the sound of the whole system depends on the power supply…

        I would like to try a pure passive, no regs, supply starting with the clocks.

        I made good experience with LCLC and LT4320, very low resistance chokes like 50mohm, nano cores, and super through caps from Nichicon…

        Is there a ripple spec to meet for the drixco ?

        Maybe later i d try as well for the fifo or dac, but the clocks seem to be quiet sensitive and its only one psu…

      • #2123
        The Well Audio
        Participant

          You can take as reference the ripple coming from a standard LM317 since the measured phase noise with such regulator was the same as using better linear regulator or batteries.

        • #2135
          multiblitz
          Participant

            ok, The LM317 claims a ripple rejection of -64db…which for a 15V output supply would result in 20mVpp ripple if I got it right.

            With a simple LC using 170mH and 200mohm choke and a 50000uF cap after that I will get 6mVpp…

            …so a simple LC instead of a LCLC should be enough ?

            That is something I can easily test as all the components are in the house…

          • #2144
            The Well Audio
            Participant

              Theoretically yes, but never tested.

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