What is a flyback transformer, and what does it do?
ANSWER. Who says that US engineers don’t appreciate poetry? Swallows fly back to Capistrano. And flyback transformers— Well, they don’t really fly to Capistrano or anywhere else. That’s where the poetry comes in. Your TV’s flyback transformer (or just “flyback”) is a high-frequency step-up transformer. The term “flyback” refers to a pulse that occurs at the end of every TV line. This pulse causes the scanning beam to fly back to the left side of your picture tube. At the end of a video field, the scanning beam flies back to the top of the screen. Without flyback action, we simply wouldn’t have a picture. FLYBACK FUNCTION. Poor Europeans use a much more prosaic term for the flyback transformer. They call it the “high tension transformer.” Flyback or HT, this transformer performs a fantastic chore: It takes AC voltage from the horizontal output transistor and steps up this voltage to 25 kilovolts. This 25 kV drives the second anode or ultor of your color picture tube (CRT). Larger sets m
