Hi Mal !

Here's another Link:

http://www.antennex.com/preview/archive3/powers.htm

Mostly the screws of PCB provide the electrical connection between earth
and negative side. Sometimes it's enough to remove the copper of the PCB
in this area or using insulating washers between PCB and the metal of
the chassis.

Some or even most of the units also require a minimum load (in the 50mA
range) in order to work properly. Mine is working without such a minimum
load but making a chirping sound then....

73
OE3GHB
Gerhard


 



Am Mittwoch, den 08.12.2010, 14:40 +0000 schrieb mal hamilton:
> All
> Does anyone know the plug/pin connection voltages for a typical
> desktop computer smpsu.
> I expect its the large 20 pin plug that goes to the motherboard. Some
> of these units I have discovered deliver 12 v + at 15 amps and several
> in series would be useful for a high voltage psu for a FET PA.
> Any info would be useful for would be modifiers of such units, and if
> the neg side can be isolated from the chassis.
>  
> de mal/g3kev
>