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S5U4G 5U4G / 5C3S / 5Ц3C NOS

5U4G rectifier tube made by old Svetlana factory (5Ц3C/5C3S). This is the sought after version with the special black anodes.

Tube Type:    5U4/5C3S/5Z3P/274B
Socket:    Octal (8Pin)