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The 300B is the king of directly-heated triodes. Shuguang has built 300B tubes since 1993 – the “Golden Dragon” 300B received a Quality Honor Certificate issued under the authorization of the British Queen. Today the family spans the standard 300B-98 to the Treasure 300B-Z and the WE300B replica.
Lineup
300B-98
The 1998-upgraded standard – Shuguang’s best-selling 300B.
300B-98B
300B-98 with alternative base and internal refinements.
300BS-B
Spherical-bottle version, design-finalized in 2003.
300B-Z (Treasure)
Treasure series – carbon-coated bottle, premium materials, tight matching.
WE300B (WE Replica)
Faithful Western Electric replica, design-finalized in 2013.
Specifications
Click an image to view the full-size specification sheet.
📄 Shuguang Catalogue 2024 (PDF)
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*We also accept custom orders for factory-level burn-in, precision testing, matched pairs / quads, special grading and OEM requirements. For a quotation or consultation, please contact us here.