bobbin wound coils, toroidal coils, audio transformers, high voltage transformers, power transformers, transformers to specification, three phase transformers, toroidal transformers, welding transformers, transformer coils, ferrite core coils, ferro resonant transformers, high current coils, pot core transformers available from jackson engineering co. based in chatsworth, ca. click the links below to visit our website or contact us via our profile page.