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

[Tony Duell]

>   OK I just picked up some computers with 150 Amp 5 volt supplies. Now 
> figure out the necessary resistrance and wattage and go find me a 
> resistor :-) 

Now what I'd do there is very simple...

6V car headlamp bulbs tend to have 36W filaments, and double-dippers with 
2 36W filaments are not uncommon. For short periods (like testing PSUs) 
you could run both filaments together. And light bulbs approximate to 
constant current devices, so I would guess they'd take 6A (each filament) 
from a 5V supply too. Or thereabouts.

I'd normally test a PSU at around half its rated current, so around 75A. 
Each bulb (both filaments) takes 12A, so use half a dozen of them. And 
yes I do keep such bulbs in stock for testing such PSUs (my I2S image 
processors have such a PSU module for each crate...)

-tony