Microminiature transformers

Requirements for microminiature transformers and inductors in aerospace applications are being met with a line of 1/8-in and 1/4-in cube units. These transformers are used for audio, carrier, broad-band and power supply service in telemetering amplifiers, inertial guidance systems, and other applications. The transformers are manufactured with laminations and bobbin-wound coils, usually under microscopes, to exacting electrical and environmental requirements. Special manufacturing and test equipment has been developed because of the microminiature size. Typical ratings are 25 mW for the 1/8-in cube, 200 mW for the 1/4-in cube. Three typical applications are described.