Bill - Thanks for your help! That would be great if you can find that Elektor article. And the pointer to Circuit Cellar - I'll be pouring over that site...

Steve (and/or Bill?) - I have a transformer question that hopefully you can answer: Let's say I have a transformer that takes 120VAC and gives me an output of 12VAC. If I have a 2V (1.67%) drop at the input, will I have a corresponding drop at the output (12 * 0.0167 = 0.2V)? In this case, my input would be 118VAC and my output would be 11.8VAC. If so, does anyone have a feel for how linear it is? Again, my voltage of interest is only between 115V - 125V AC.

Thanks!