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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

3B2

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BrandSYLVANIA
ClassHigh Voltage Rectifier
BaseOctal
Filament1.5 V @ 220 mA

Construction

Primary TypeRectifier
Rectifier TypeHalf-wave
EnvelopeT-12
Sections1

Filament / Heater

Heater NotesCoated Unipotential Cathode

Absolute Maximum Ratings

Plate Voltage35000 V
Cathode Current1.1 mA

Audio Performance

Key Features
  • Half-wave rectifier
  • High voltage
  • Color television application
  • Coated Unipotential Cathode

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Tube Drop with DC135 V———7 mA

Application Notes

The Sylvania Type 3B2 is designed for application as a high voltage rectifier in color television receivers.

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