ferrite core purpose

http://martinsdzl858.trexgame.net/the-emi-ferrite-awards-the-best-worst-and-weirdest-things-we-ve-seen

The Emi Main is produced up of ED Ef (Emitter Farad) and B+ for the output. In the input to the Emi Main the output impedance is often held small to lessen any feedback problems. The BC235 is Commonly used to deliver