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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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Tube-number record

217-C

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BrandRadio Corporation of America
ClassHalf-wave vacuum rectifier
Base4-pin

Construction

Primary TypeVacuum
Rectifier Typehalf-wave
EnvelopeT-18
Base MaterialMetal
Sections1

Filament / Heater

MaterialThoriated Tungsten

Absolute Maximum Ratings

Cathode Current150 mA

Audio Performance

Key Features
  • Not recommended for new equipment design
  • Thoriated Tungsten Filament

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