Handbook for Sound Engineers, 4th Edition

Chapter 11

Audio Transformer Basics

 

by Bill Whitlock

11.1 Audio Transformer Basics

11.1.1 Basic Principles and Terminology

11.1.1.1 Magnetic Fields and Induction

11.1.1.2 Windings and Turns Ratio

11.1.1.3 Excitation Current

11.1.2 Realities of Practical Transformers

11.1.2.1 Core Materials and Construction

11.1.2.2 Winding Resistances and Auto-Transformers

11.1.2.3 Leakage Inductance and Winding Techniques

11.1.2.4 Winding Capacitances and Faraday Shields

11.1.2.5 Magnetic Shielding

11.1.3 General Application Considerations

11.1.3.1 Maximum Signal Level, Distortion, and Source Impedance

11.1.3.2 Frequency Response

11.1.3.3 Insertion Loss

11.1.3.4 Sources with Zero Impedance

11.1.3.5 Bi-Directional Reflection of Impedances

11.1.3.6 Transformer ...