EL71
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BrandMullard
ClassOutput Pentode
BaseB8D/F
Filament6.3V @ 450mA
Construction
Primary TypePentode
EnvelopeSubminiature Glass
Base MaterialGlass
SectionsSingle
Filament / Heater
Heater NotesIndirectly heated
Absolute Maximum Ratings
Plate Voltage165 V
Plate Dissipation4 W
Grid 2 Voltage155 V
Grid 1 Voltage-55 V
Cathode Current50 mA
H-C Voltage200 V
Audio Performance
Typical THD10%
Power Output1 W
Key Features
- Subminiature
- High transconductance
- Flexible leads
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Single-ended Class A | 110V | - | 15000 | - | 30mA |
Application Notes
Direct soldered connections to the leads must be at least 5mm from the seal. Any bending of the valve leads must be at least 1.5mm from the seal. Requires adequate cooling via metal clip or heat sink.
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