E80F
2 Tubes in archive
BrandPhilips
ClassReliable Pentode
BaseNOVAL
Filament6.3V @ 300mA
Construction
Primary TypePentode
EnvelopeGlass
SectionsSingle
Filament / Heater
Heater NotesIndirect heating by A.C. or D.C.; series or parallel supply
Absolute Maximum Ratings
Plate Voltage300 V
Plate Dissipation1.3 W
Grid 2 Voltage200 V
Grid 1 Voltage100 V
Cathode Current9 mA
H-C Voltage120 V
Audio Performance
Typical THD1.4%
Key Features
- Special Quality (SQ)
- Reliable Pentode
- Shock and vibration proof
- Low noise and hum
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Pentode | 250V | 1850 | 1500000 | 25 | 3mA |
| Electrometer Pentode | 40V | - | - | - | 0.04mA |
Application Notes
Designed for use in professional equipment where long life and high reliability are required. Can be used as a resistance coupled A.F. amplifier or electrometer pentode.
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