Profile: Signal Transformer custom designs & manufactures linear transformers and high frequency inductors. Our 3 phase transformers are available from small PC mount 10 VA devices to large 45 KVA designs. These transformers are designed for operation of 50 to 400 Hz frequency range, can be shielded or unshielded, and are suitable for a wide variety of applications from medical equipment to avionics systems. Our CH & CL chokes are designed to complement the rectifier power transformers so that a set may be specified for DC power supplies using inductive filters. Both the series can be chassis or rack mounted and quickly modified for DIN rail applications.