E90F
4 Tubes in archive
BrandPHILIPS
ClassSharp cut-off R.F. Pentode
BaseMiniature
Filament6.3V @ 150mA
Construction
Primary TypePentode
EnvelopeGlass
SectionsSingle
Filament / Heater
Heater NotesIndirect by A.C. or D.C.; series or parallel supply
Absolute Maximum Ratings
Plate Voltage330 V
Plate Dissipation2.6 W
Grid 2 Voltage165 V
Grid 1 Voltage-55 V
Cathode Current15 mA
H-C Voltage135 V
Audio Performance
Key Features
- Shock and vibration resistant
- SPECIAL QUALITY
- Sharp cut-off
- Industrial and mobile equipment use
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Pentode | 250V | 4600 | 250000 | 48 | 7.4mA |
Application Notes
Heater voltage variations of +20% are allowed during short periods. Circuit operation with cathode bias is recommended. Noise output max 100 mVolt.
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