Signal Transformer - Signal Transformer offers a comprehensive line of world-class, off-the-shelf transformers, components, and inductors. We lead the 50-60 Hz transformer market in terms of sales, breadth of line, and inventory. Choose from printed-circuit (PC) and chassis-mount versions in a wide variety of domestic and international configurations. If you need a custom design, we'll help identify your requirements and develop the magnetics to meet your specific needs.