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Tube Database (7,341 tube types · 1,270 archive entries)

Pre (2,630 tube types), Other (2,603 tube types), Power (1,292 tube types), Rectifier (816 tube types)

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Tube record

300B

Brand: Usr

Round Tip

Base: Black
Bottle Height: Tall Bottle
Bottle Shape: Coke Bottle
Country: Japan
Getter: Bottom Getter
Glass Color: Clear Glass
Mica: Double
Archive ID: epfkdfs9
Pin Color: Silver
Plate Color: Black Carbon
Tip Shape: Round Tip