Stancor Incorporated RT-208 Rectifier Transformer

The Stancor RT-208 Rectifier Transformer is a vintage center-tapped power transformer designed for full-wave rectification in selenium-rectifier power supplies. In typical configurations, it accepts 117 V mains on the primary and delivers a 208 V center-tapped secondary capable of about 15 A, enabling a high-voltage DC rail after rectification. Part of Stancor's RT series, this unit is built as a panel-mount power transformer intended for use in tube-era equipment and other vintage gear requiring a robust HV supply. The RT-208's winding arrangement and terminal pattern are documented in historical Stancor catalogs as a Rectifier Circuit Power Transformer, making it a recognizable replacement-part option when servicing vintage power supplies.