Tube-number record
EL31
0 archive entries
BrandMullard
ClassOutput Pentode
BaseOctal
Filament6.3 V @ 1.4 mA
Construction
Primary TypePentode
EnvelopeGlass
Base MaterialStandard
SectionsSingle
Filament / Heater
Heater NotesIndirectly heated
Absolute Maximum Ratings
Plate Voltage800 V
Plate Dissipation25 W
Grid 2 Voltage400 V
Grid 1 Voltage-1.3 V
Cathode Current200 mA
H-C Voltage100 V
Audio Performance
Typical THD13.1%
Power Output12 W
Key Features
- Anode top cap
- 25 Watt plate dissipation
- High power output up to 100W in push-pull
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Single Valve | 275 V | 14000 | 20000 | 16.5 | 91 mA |
| Single Valve | 600 V | 7000 | 43000 | — | 42 mA |
Application Notes
The EL31 is particularly suited for power amplifiers in push-pull stages. An anode top cap is used to permit maximum anode voltages up to 800V. For lower power, two EL37 valves in push-pull are normally used.
Datasheets
Datasheet: EL31.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
0 results