8444
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BrandSYLVANIA
ClassSharp cutoff pentode
BaseE8-10 Subminiature Button
Filament6.3V @ 125mA
Construction
Primary Typepentode
EnvelopeT-3
Base MaterialGlass
SectionsSingle
Filament / Heater
Heater NotesCenter rated value 6.3 volts
Absolute Maximum Ratings
Plate Voltage165 V
Plate Dissipation1.1 W
Grid 2 Voltage155 V
Grid 1 Voltage-55 V
Cathode Current16.5 mA
H-C Voltage100 V
Audio Performance
Key Features
- Subminiature strap frame grid
- Sharp cutoff
- High transconductance
- Low grid to plate capacitance
- Vibration resistant
- High altitude
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Standard | 100V | 9000 | 260000 | - | 8.5mA |
Application Notes
The 8444 is well suited to VHF, RF and IF amplifier and mixer service. Designed for severe shock and vibration conditions.
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