On 27 Aug 2005 06:36:29 -0700, "Random Person"
<nonexistent2032@yahoo.co.uk> wrote:

>Hiya Marc. If I remember the electrical part of my college Physics,
>isn't it just a matter of getting the number of coils on the
>transformers correct? How hard can it be for a PSU to supply a correct
>output voltage?
>
>What other issues am I missing?


You are missing that "number of coils" is only valid at a
narrow range of power output, it varies quite a lot
depending on the load. For example, grab a cheap wall-wart
(brick AC-DC adapter) of the typical
transformer->rectifier->capacitor type design (rather than a
switching type design) and measure it's output while under
different loads- and compare to it's rated output.