Hello this is Nijjar. I am new to this forum and a beginner with amps, This is my first post. I was working on some SMPS with TL494 and amp based on TDA7294. Could somebody plz advice how I could build my own transformer for SMPS instead of using one from ATX supply. I have attached the schematic of PSU and Amp. Some specification of transformer are given in schematic, Kindly try to give detailed explanation on how to build it with wire guage, core size etc.