R: Fw: [sdiy] First synth to build? PC power supply unit

[TooManySynths]

Especially the -12.  They are seldom even.  The
primary reason for -12 is RS232.  +12 otoh, runs 5.25
disk drive motors, cooling fans, and at least a few
years ago, hard drive motors.  So they are ALWAYS
uneven in terms of current capacity.  In addition,
they are not designed to have their outputs accessed
easily.  As far as +5 being loaded, I've run into a
few that don't will work with +12 loaded, but I'm not
really sure as the standard technique is to just plug
a hard drive in to test the power supply. I agree
with, I believe Harry, go buy a +-15v linear power
supply. (Or...shhhh...steal one from a dead poly6 :)

Daryl


--- matti <matti at devo.com> wrote:
> PC power supply units are switching, not linear,
> which results in nasty
> noise, and oftentimes (always?) require a heavy load
> on the +5v. Moreover,
> the outputs at +-12v (I don't think they commonly
> have +-15v outputs) tend
> to have insufficient current supplying capacity for
> usefulness.
> 
> On Fri, 21 Sep 2001, sandrotraversi wrote:
> 
> > Hi list ,
> >
> > i'm not a tech and i'd have to be the latest to
> speak , but
> > ... why not a pc power supply ?
> > or is PC power supply units good for a sinth DIY
> project ?
> >
> > Sandro
> >
> 
> -
> finland red
> germany black
> egypt white
> 


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