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Tube Database (1,270 tubes)

Other (3257), Pre (2314), Power (1030), Rectifier (740)
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3W4/3S4-SF

0 Tubes in archive

BrandFederation of Japan Electric Communication Industrial Associations
ClassPower Amplifier Pentode
BaseMiniature 7-pin (B7G)

Construction

Primary TypePentode
EnvelopeT-5 1/2
Base MaterialGlass
SectionsSingle

Filament / Heater

Materialcoated

Absolute Maximum Ratings

Plate Voltage99 V
Grid 2 Voltage90 V
Cathode Current11 mA

Audio Performance

Typical THD12%
Power Output0.25 W
Key Features
  • Series/Parallel Filament Operation
  • Directly Heated Cathode

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Class A Amplifier85V1700150000-6.8mA

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