Efficient Toroidal Coil Corporation was founded on the philosophy that better Precision Toroidal Transformers & Wire Wound Potentiometers were needed by industry. Efficient Toroidal Coil Corporation (E.T.C) has been a pioneer in both Toroidal Transformer & Wire Wound Potentiometers Since1994 and continues to lead the way in terms of products Innovation and custom build products. Constant Researches are conducted to test new and better materials to meet pace with the requirements of the growing industry. Indigenization and development of custom built products are the challenges met by ETC Engineers. The latest in machine tools and winding equipments are available for producing the extremely with high precision measuring and testing equipm...