3. A MINIATURE MAGNETIC CORE AND COMPONENT ASSEMBLY COMPRISING: A BASE MEMBER FORMED OF DIELECTRIC NONMAGNETIC MATERIAL AND HAVING A PLURALITY OF CONDUCTOR PINS EXTENDING THERETHROUGH TO PROVIDE TERMINALS FOR MAKING ELECTRICAL CONNECTIONS, A PLURALITY OF ELECTRICAL COMPONENTS FORMED INTEGRALLY WITH SAID BASE MEMBER AND CONNECTED ELECTRICALLY IN CIRCUIT WITH A NUMBER OF SAID CONDUCTOR PINS, A MAGNETIC CORE, A PRIMARY AND A SECONDARY WINDING INDUCTIVELY COUPLED ON SAID MAGNETIC CORE AND CONNECTED IN ELECTRICAL CIRCUIT WITH SOME OF SAID PLURALITY OF CONDUCTOR PINS, A CASE ELEMENT HAVING AN APERTURE FOR RECEIVING SAID MAGNETIC CORE, SAID BASE MEMBER BEING POSITIONED IN AND COVERING SAID APERTURE TO FORM IN CONJUNCTION WITH SAID CASE ELEMENT AN ENCLOSURE OF SAID MAGNETIC CORE, AND POTTING MATERIAL SUBSTANTIALLY FILLING THE ENCLOSURE FORMED BY SAID BASE MEMBER AND CASE ELEMENT THEREBY TO ENCAPSULATE SAID MAGNETIC CORE.