[sdiy] Transformer confusion

[Harry Bissell Jr]

--- Robotboy8 at aol.com wrote:

> Alright.  I was thinking about transformers today,
> and have come up with a 
> lossless passive amplifier!  (Okay, I know this
> wouldn't work, elsewise it would 
> be a miracle device that everyone would have heard
> of... but I'm trying to 
> figure out WHY not).
> 
> So.  A step-up transformer - two magnetic cores with
> wires, yadda yadda - 
> increases voltage, but you pay for that increase
> with a decrease in wattage.  

No. An increase in CURRENT

The wattage (power) on each side of a transformer
is nearly constant, with some small loss.

You get nothing for nothing

H^) harry

> (right?)  So far we have the xformer with less
> windings on the left and the one 
> with more on the right.  Now get another one that's
> identical to the one on the 
> right (more windings than the one on the left) and
> set it furthest left (so 
> you have more-wound, less-wound, more-wound in that
> order).  That one will act 
> identically to the one on the right (correct?) but
> be 180 degrees out of phase 
> (correct?).  But what if you ran that through an
> inverter and combined that 
> signal with the output of the other more-wound
> inductor, wouldn't you have a 
> higher signal (in voltage AND wattage) than what you
> started with?
> 
> I know it doesn't work this way.  What I'm wondering
> is why it doesn't.
>        -eric
>