4097-A
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BrandStandard Valves
ClassTriode
BaseStandard British 4-pin
Construction
Primary TypeTriode
EnvelopeGlass
SectionsSingle
Filament / Heater
MaterialOxide coated
Absolute Maximum Ratings
Plate Voltage500 V
Plate Dissipation30 W
Cathode Current135 mA
Audio Performance
Power Output75 W
Key Features
- Oxide coated filament
- Constant voltage type
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| General Operating Point | 500V | 3300 | 3000 | 10 | 50mA |
| Class B A.F. Amp. (2-valve) | 500V | - | 3300 | - | 25mA |
| Class B Radio Frequency Telephony | 500V | - | - | - | 100mA |
| Class C Radio Frequency Telephony | 350V | - | - | - | 130mA |
| Class C Radio Frequency Telegraphy | 500V | - |
Application Notes
Typical operation for Class B AF covers balanced 2-valve circuits with 75W output.
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