6X4 ( EZ90 ) RCA Black Plates O Getter Tube Rectifier Made in USA – Vacuum Tubes Treasures
6X4 Tube Full Wave High Vacuum Rectifier, Various US Brands. Miniature heater-cathode type twin diode designed for full-wave rectifier operation in compact power supplies. MFR: RCA. SKU: 6X4. New old stock. No