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

Other (3,257 tube types), Pre (2,314 tube types), Power (1,030 tube types), Rectifier (740 tube types)
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Manufacturer record

Usr

1 Tube manufactured by Usr

  • Usr 300B tube — photo 1 of 3
    Usr 300B tube — photo 2 of 3
    Usr 300B tube — photo 3 of 3

    Use the Left and Right Arrow keys to browse photos. Use Home for the first photo and End for the last photo.

    Photo 1 of 3

    300B

    Brand
    Usr
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