[quote=Sephiroth;21630]lol... yeah, I understand the bridge rectifier is for the AC off the secondary coil...

Sorry Sephiroth i didnt realize you have good knowledge of things Ive found the rectifer to not let the rest of the sg circuit see the third winding directly ,just curculates the sg currents through the third winding. (no direct draw from primary battery or its windings)keeping the sg curcuit efficient and seperate. When the spike with no current hits the third winding the rectifier lets it through to the cap.This is what i see but could be wrong.To me its just a way to show how bemf can be captured without direct draw from the coil. I personly found better results with the bifiliar multi coil setup ..I like your utube site nice work.