I have added under tutorial a presentation from Dr. Ferch which highlights the benefit and performance gain of Nanoperm material compared to standard Ferrite material. You find the document under the letter N in tutorial. Look for this image
I like to kick of a new testing series where I investigate in more details about this interesting phenomena. I move away from the transformer performance over to the ferrite performance. In this way the winding has only one function and that is to saturate the core and the transistor. Also note based on my extensive testing with transistors currently