Tube-number record
3B/200-B
0 archive entries
3B/200-B is a tube type in the TubeDatabase archive (class: Triode). Recorded specifications: brand Standard Valves, construction Triode, socket 4-pin, maximum plate voltage 600 V, and maximum plate dissipation 20 W. The archive does not yet hold a photographed example of this type.
BrandStandard Valves
ClassTriode
Base4-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 | 400 V | 5000 | 5000 | 25 | 50 mA |
| Class B A.F. Amp and Mod. (2 valves) | 600 V | — | — | — | 64 mA |
| Radio Frequency Class B Telephony | 600 V | — | — | — | 50 mA |
| Radio Frequency Class C Telephony | 450 V | — | — | — | 67 mA |
| Radio Frequency Class C Telegraphy | 600 V | — | — | — | 75 mA |
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