atomicbob's SMPS Noise Nuke for HP amps with external SMPS

Discussion in 'Headphone Amplifier Measurements' started by atomicbob, Sep 26, 2017.

  1. Cspirou

    Cspirou They call me Sparky

    Friend
    Joined:
    Sep 27, 2015
    Likes Received:
    2,675
    Trophy Points:
    113
    Location:
    Irvine,CA
    Especially since its a 10 layer board.

    I think that's also why the average DIYer can create a pretty good Class AB amp and linear supply but need to resort to modules when it comes to SMPS and Class D.
     
    atomicbob likes this.
  2. Luckbad

    Luckbad Traded in a unicorn for a Corolla

    Friend
    Joined:
    Sep 27, 2015
    Likes Received:
    2,385
    Trophy Points:
    113
    Location:
    Laguna Hills, CA
    Home Page:
    @atomicbob Thank you kindly! The answer was about 9.8x as thorough as I was anticipating (because it came from you... for others, it's about 47x as thorough as I'd expect).

    @Cspirou The magic is not in the switching power supply, it's inside the chassis. I was reading about it earlier, mostly with regard to the ADI-2 DAC, and I figure the Pro has at least as much going on with the power inside as the DAC version.

    From the ADI-2 DAC manual (yes, I like manual pron):

     
    Thad E Ginathom likes this.
  3. highflyin9

    highflyin9 Almost "Made"

    Contributor
    Joined:
    Aug 3, 2017
    Likes Received:
    103
    Trophy Points:
    33
    Location:
    DC/MD/VA Area
    Home Page:
    Very simple and interesting solution. Thinking it might be just what the doctor ordered for the Amp Camp with Meanwell PSU. Looks like Hammond makes a 1.5mH and 10mH inductor at 5A. I'm thinking I may try the 1.5mH (156B). There should be enough real-estate to mount the circuit right in the unit.

    Just to confirm to others as you can't see in the image, but the caps are in parallel, and adding a film bypass would be in parallel as well.
     
    Last edited: Jun 8, 2018
    rshuck likes this.

Share This Page