Description
The Svetlana 5U4G (also designated 5C3S) is a New Old Stock large-bottle (‘G’ envelope) full-wave rectifier valve made in Russia under the iconic Winged-C Svetlana brand. The Winged-C Svetlana factory in St. Petersburg was renowned for producing some of the finest current-production valves before ceasing tube manufacture in 2012, making this genuine NOS stock increasingly collectible.
Like all tube rectifiers, the 5U4G provides a soft, gradual power supply start-up that is highly valued in both Hi-Fi and musical instrument amplifiers. The large glass envelope and carefully wound heater make this a visually impressive and sonically excellent choice.
Compatible with 5Z3P and 5U4GB. Images shown are representative — valves ship in plain white boxes. Single valve — AMPLITREX AT1000 tested.




