Tube-number record
E99F
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BrandPHILIPS
ClassR.F. Pentode
BaseMiniature 7-pin (B7G)
Filament6.3 V @ 150 mA
Construction
Primary TypePentode
EnvelopeGlass
Sections1
Filament / Heater
Heater NotesIndirect by A.C. or D.C.; parallel or series supply. Heater voltage variations of +/- 20% allowed during short periods.
Absolute Maximum Ratings
Plate Voltage330 V
Plate Dissipation3.3 W
Grid 2 Voltage330 V
Grid 1 Voltage-55 V
Cathode Current17 mA
H-C Voltage100 V
Audio Performance
Key Features
- Special Quality
- Shock and Vibration Resistant
- Variable mutual conductance
- Mobile equipment design
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Pentode | 250 V | 3800 | 1000000 | — | 9.2 mA |
| Cut-off | 250 V | 10 | — | — | — |
Application Notes
Circuit operation with cathode bias is recommended. Tube life and reliability enhanced by operation at lower temperature.
Datasheets
Datasheet: E99F.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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