Hello, good morning, I hope you have a passport and give me some of your time it turns out that I want to make several transformers, for an amplifier with the ic LA4440 I remember 17 years ago I learned to rewind with some chips and formulas that I don't know how to start today. someone give me a hand, to make this transformer from 0 I require all the complete information to produce other transformers with different voltages greetings