Originally Posted by NrGx
But where does that powerloss come from? Heat! Why is heat created? Powerdissipation because of a voltage drop. WHy do you get voltage drops? RESISTANCE. The wires and transformer have resistance.
Correct me if I'm wrong...
Here's the thing. He discused how transformers have a ratio on them (like 10:1 for 12V rail) but what he didn't say is that that's a ratio, not how many times the wire is wrapped around the cores. The more times you wrap around the cores, the better quality the output. This creates a catch-22 though. As you increase the number of wraps, you increase the resistance through the wire (Because you get more and more wire). Typically when the current travles through transistors, it'll move through multiples of football fields in length of wire (I pulled one apart..... it wasn't pretty).
So, there's a big reason for drop in power in the unit. Also, you must know that transformers are not perfect. NrGx talks about the "Electromagnetic induction" of the transformer, but he doesn't explain that since the magnetism has to travel through a medium (usually steel), it looses some of it's magnitude/power (For those of you in physics, the E Field looses some strength because it has to travel a bit). This also causes a drop in the effeciency of the PSU.
Hope all this helps
:stupid thumb not working