7F8W
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BrandSylvania
ClassRugged High Transconductance Double Triode
BaseLockin 8-Pin
Filament6.3V @ 300mA
Construction
Primary TypeDouble Triode
EnvelopeT9
Base MaterialLockin
Sections2
Filament / Heater
Heater NotesCoated Unipotential Cathode
Absolute Maximum Ratings
Plate Voltage300 V
Plate Dissipation3.5 W
H-C Voltage250 V
Audio Performance
Key Features
- Ruggedized
- High transconductance
- Shock resistant
- Vibration resistant
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A Amplifier (Each Section) | 250V | 5200 | - | 50 | 10.5mA |
Application Notes
Designed for use in applications requiring resistance to shock and vibration.
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