Tube DIY Asylum

• But not all, and even the energy above 20kHz is too close - Triode_Kingdom 18:24:38 03/30/24 (2)
  In Reply to: RE: Most of the crud is well above 20kHz (nt) posted by Chip647 on March 30, 2024 at 13:09:37

  So it mixes with the desired signals to create random IM distortion all through the audio band. Shielding and filtering are usually both required to resolve this problem.
  

  ---

  • Like anything, there are tradeoffs - Chip647 09:53:51 03/31/24 (1)
    In Reply to: RE: But not all, and even the energy above 20kHz is too close posted by Triode_Kingdom on March 30, 2024 at 18:24:38

    For a 1.2 amp 5V supply, I agree it is not the absolute best solution to use a SMPS as they are not too difficult to build if you have the right transformers.
    
    But simply using a decent SMPS in a remote box through a 2ohm/10,000uf RC filter into a Rod Coleman V9 regulator, is very functional and dead silent. If builders are struggling with the dreaded 120hz noise and don't have the taps to generate 8 volts of DC for the regulator, it is definitely a workable solution.
    

    ---

    • RE: Like anything, there are tradeoffs - Stephen R 01:24:01 04/07/24 (0)
      In Reply to: RE: Like anything, there are tradeoffs posted by Chip647 on March 31, 2024 at 09:53:51

      Yes, I did this and lived with happily. SMPS into Coleman Regs to GM70s. One thing against, was mine were in close range to other stuff.
      
      I went linear with Rob's suggestion from his website and it was way better for what I was after.
      
      But at a big disadvantage in size, weight and cost.
      
      Technically I was always concerned about the high order products mixing with the audio. Just didn't feel the right thing to do at such a sensitive part of the circuit.
      
      
      

      ---

Post a Followup:

This post is made possible by the generous support of people like you and our sponsors:

Parts Connexion

---

[ Top of Page ] [ Contact Us ] [ Support/Wish List ] [ Copyright © 2025, Audio Asylum, all rights reserved ]

---

[ General ] [ Speakers ] [ Tubes ] [ Vinyl ] [ Digital ] [ Hi-Rez ] [ Video Asylum ] [ Cables ] [ Tweaks/DIY ] [ Music ] [ Films ]

---