Miniaturized audio transformer design for transistor applications

The electrical and physical parameters which are of concern in audio transformer design and their relationships to the problems of miniaturization are discussed. A detailed design of two typical audio transformers for transistor application is presented to illustrate the application of the design information obtained in the SCEL investigation on the subject. Several methods of sealing these miniature units and the effect on the ultimate size are reviewed. General information pertinent to the design of miniaturized audio transformers is assembled in the appendix.