EL33
1 Tube in archive
BrandMullard
ClassOutput Pentode
BaseOctal
Filament6.3V @ 0.9mA
Construction
Primary TypePentode
EnvelopeGlass
SectionsSingle
Filament / Heater
Heater NotesA.C. mains-operated equipment
Absolute Maximum Ratings
Plate Voltage250 V
Plate Dissipation9 W
Grid 2 Voltage275 V
Grid 1 Voltage-1.3 V
Cathode Current55 mA
H-C Voltage50 V
Audio Performance
Typical THD10%
Power Output4 W
Key Features
- High-sensitivity
- Indirectly heated
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A Amplifier | 250V | 9000 | 50000 | 23 | 36mA |
| Push-Pull (Two Valves) | 250V | - | - | - | 48mA |
Application Notes
High-sensitivity output pentode for use in A.C. mains-operated equipment.
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