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PHILCO 7B4 triode
PHILCO 7B4 triode
© Collection of Historical Scientific Instruments, Harvard University

PHILCO 7B4 triode

Inventory NumberVT0080
ClassificationVacuum Tube
Maker Philadelphia Storage Battery Company 1906 - 1940
Cultural Region
    Place of Origin
      Dimensions8.2 × 3.1 × 3.1 cm (3 1/4 × 1 1/4 × 1 1/4 in.)
      FunctionAmplifier etc
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      Philadelphia Storage Battery Company
      Date: 1942
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      Object number: VT0926
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      Object number: VT1440
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      Date: 1938
      Object number: VT1244
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      Date: circa 1940
      Object number: RS0065b
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      Philco model 65 lowboy console radio
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      Object number: RS0599
      Image Not Available for TRIODE
      TRIODE
      Philadelphia Storage Battery Company
      Object number: VT0108