3B/200-B
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BrandStandard Valves
ClassTriode
BaseStandard British 4 pin
Construction
Primary TypeTriode
EnvelopeGlass
SectionsSingle
Filament / Heater
MaterialOxide coated
Absolute Maximum Ratings
Plate Voltage600 V
Plate Dissipation20 W
Cathode Current135 mA
Audio Performance
Power Output40 W
Key Features
- Oxide coated filament
- Constant voltage type
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Static Characteristics | 400V | 5000 | 5000 | 25 | 50mA |
| Class B A.F. Amp and Mod. (2 valves) | 600V | - | - | - | 64mA |
| Radio Frequency Class B Telephony | 600V | - | - | - | 50mA |
| Radio Frequency Class C Telephony | 450V | - | - | - | 67mA |
| Radio Frequency Class C Telegraphy | 600V | - |
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