Tube-number record
3B/100-B
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BrandStandard Valves
ClassTRIODE
Base5-pin
Filament4 V @ 1.1 mA
Construction
Primary TypeTriode
EnvelopeGlass
SectionsSingle
Filament / Heater
Heater NotesIndirectly heated oxide coated. Constant voltage type.
Absolute Maximum Ratings
Plate Voltage200 V
Plate Dissipation10 W
Cathode Current50 mA
Audio Performance
Typical THD3%
Power Output0.25 W
Key Features
- Indirectly heated oxide coated
- Constant voltage type
- Standard British 5-pin base
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A AF Amplifier | 200 V | 6500 | 2000 | 13 | 40 mA |
| Class A AF Amplifier (Point 1) | 100 V | — | 8000 | — | 23 mA |
| Class A AF Amplifier (Point 3) | 150 V | — | 10000 | — | 40 mA |
Application Notes
Typical performance data recorded at Vp = 200V, Vg1 = -10V.
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