7F8
0 Tubes in archive
BrandGeneral Electric
ClassTwin Triode
BaseLocking-In 8-Pin
Filament6.3V @ 300mA
Construction
Primary TypeTriode
EnvelopeT-9 Glass
SectionsTwin
Filament / Heater
Heater NotesCoated Unipotential Cathode
Absolute Maximum Ratings
Plate Voltage250 V
Plate Dissipation3.5 W
H-C Voltage90 V
Audio Performance
Key Features
- Grounded-grid radio-frequency amplifier
- Frequency converter
- Operation up to 300 megacycles
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A1 Amplifier (Each Section) | 150V | 4300 | 11300 | 48 | 10mA |
Application Notes
The 7F8 is designed for use as a grounded-grid radio-frequency amplifier or as a frequency converter at frequencies up to 300 megacycles. Cathode-bias resistor for typical operation is 500 Ohms. D-C resistance in the grid circuit should not exceed 0.5 megohm.
Datasheet Viewer
Loading datasheet...
Sort by
Showing 1 to 0 of 0 results