From: invalid@invalid.invalid   
      
   On Fri, 16 Sep 2016 21:33:35 -0700, Big Bad Bob wrote:   
      
      
   >   
   > I'm sure you could use it directly with a push-pull output.  will have   
   > to build one to make sure.  but I've already settled on a linear   
   > regulator [and tested it] for a tube pre-amp.  That's one extra   
   > transistor, 2 ~150V zeners, a couple of resistors and capacitors, and   
   > voila!  A well-regulated power supply on the pre-amp, relatively   
   > noise-free, stable, and tolerant of power transients.   
   >   
   > I could still use an improved CPU with a different A:D.  I've already   
   > worked with a specific one, in fact.   
   >   
   > Anyway, non-differential (i.e. S.E. or 'non push-pull') circuits would   
   > need a linear regulator to stabilize the voltage better.  but that's no   
   > problem, really.   
      
      
   As a general purpose HT supply you probably don't have a problem unless   
   you start to make scope measurements on a test circuit. That's when you'd   
   get misleading readings (what's that low frequency pumping? Amplifier   
   instability?). I doubt if you'd notice the ripple audibly, especially   
   with a single-ended load. I'm still concerned about instability with a   
   changing load though. I suspect that the reaction time of the psu will be   
   quite slow. It would be instructive to put a square wave driven CC load   
   on it to see what happens with, say, 5% load change.   
      
   Also, remember that you can use the humble LM317 as an HT regulator. Just   
   make sure that a) you never short the output, even with a capacitor of   
   any size and b) that you keep within its input-output voltage limits   
   (40v). They are cheap, cheerful and effective. :) A TL783 will give up to   
   150v input-output but is much harder to find.   
      
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