Tube-number record
8431
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BrandSylvania
ClassDouble Triode
BaseNoval (B9A)
Filament12.6 V @ 180 mA
Construction
Primary TypeDual triode
EnvelopeT-6 1/2
Base MaterialMiniature Button 9-Pin
Sections2
Filament / Heater
Heater NotesParallel Operation
Absolute Maximum Ratings
Plate Voltage200 V
Plate Dissipation3.5 W
Grid 1 Voltage-75 V
Cathode Current35 mA
H-C Voltage200 V
Audio Performance
Power Output1 W
Key Features
- Medium mu
- Designed for Continuous Class C Amplifier Service
- Optimized for Sonobuoy and battery applications
- High impact acceleration rating (500 G)
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A1 Amplifier | 90 V | 12500 | — | 33 | 15 mA |
| Class C RF Doubler to 175 Mc | 160 V | — | 33000 | — | 26 mA |
Application Notes
Rating values apply specifically to Sonobuoy and other battery applications where power output is paramount and long life is of lesser importance. Subjected to 500G impact acceleration test.
Datasheets
Datasheet: 8431.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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