Tweaker's Asylum

• Re: Audio Electronics PS Regulator Pete Fleming 18:33:22 07/29/00 (0)
  In Reply to: Audio Electronics PS Regulator posted by ccd on July 26, 2000 at 14:17:39:

  I've just subscribed to Audio Elecronics and missed this series of articles on regulation. I'm very interested in this subject. Does anyone have a copy they could email me, or is it covered somewhere else on the web?

  Cheers

  Pete
  
  

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• Re: Audio Electronics PS Regulator Damon W. Hill 01:40:12 07/27/00 (3)
  In Reply to: Audio Electronics PS Regulator posted by ccd on July 26, 2000 at 14:17:39:

  The Jung regulator has the best specifications of any regulated
  power supply I've ever seen. It works very well in my Hafler SE100
  preamp using the AD797 opamp, and I wouldn't hesitate to recommend it in general application.

  Be sure to carefully study the entire set of articles on the construction and implementation. Best results depend on proper
  wiring and grounding, including using the external sense connections
  to the load.
  
  

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  • Re: Audio Electronics PS Regulator ccd 05:24:59 07/27/00 (2)
    In Reply to: Re: Audio Electronics PS Regulator posted by Damon W. Hill on July 27, 2000 at 01:40:12:

    Do you have the regulator in a separate enclosure or were you able to retrofit your existing equipment? Apart from the specs, can you hear the difference?
    
    

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    • Re: Audio Electronics PS Regulator Damon W. Hill 11:24:48 07/27/00 (1)
      In Reply to: Re: Audio Electronics PS Regulator posted by ccd on July 27, 2000 at 05:24:59:

      The Hafler SE100 preamp is a single-board design; there is virtualy
      no external wiring. I had to think a bit, in order to minimize collateral damage when making this modification. If your power supply
      is on a separate board, that may make installation easier.

      Installing the regulator required (carefully) cutting a trace and
      drilling out two feedthroughs to isolate the line amplifier; I left
      the headphone and tape buffer ICs connected to the original 78xx
      regulators, which then required additional bypassing to cure some
      self-oscillation (cutting the traces isolated them from the bypassing
      physically located at the line amp stage).

      The new regulator board is sitting on standoffs hot-glued to the
      main board; teflon wiring is connected to the appropriate points.
      I also replaced the generic silicon rectifiers with Schottkys, added
      RC snubbers across the Schottkys and the transformer secondary to
      attenuate switching noise, and replaced all electrolytics with low-ESR
      or Black Gates.

      How does if affect the sound? I dunno, I thought I heard an improvement in depth and imaging, but lacking an identical unmodified
      unit to compare to, of course I can't say anything with certainty.
      
      

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      • Re: Audio Electronics PS Regulator ccd 13:16:51 07/27/00 (0)
        In Reply to: Re: Audio Electronics PS Regulator posted by Damon W. Hill on July 27, 2000 at 11:24:48:

        The tweaker in me got the better of me; I ordered the regulator from Old Colony.
        
        

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