Testing Power Supplies! Re: Norsk Data Nord-10/S restoration

[Jules Richardson]

On Tue, 2004-11-16 at 01:16 -0500, der Mouse wrote:
> > It takes about 5 minutes to test a PUS on dummy load.  No longer.
> 
> ...if you have Tony Duell's workshop and tools available.
> 
> I, for example, have few suitable dummy loads at hand.  I have a load
> resistor which came form an old Sun (4 ohms), though I'm not sure
> whether it's between 5V and ground or 12V and ground - it I suspect the
> latter, since it looks more like 36W than 6¼W.  (It could even be
> between 5V and 12V from what I can tell, though that would be Weird.)

I believe some PSU's need the load between 5V and ground, others between
12V and ground (or some other rail), depending on the design of the PSU.

I tend to use an old scrap hard drive as a dummy load for PSU's with 5V
and 12V rails (plus it gives an audible sound that something's
happening :)

cheers

Jules