Tube-number record
EL 51
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BrandPhilips
ClassOutput Pentode
BaseSide-contact (P-base)
Filament6.3 V @ 1900 mA
Construction
Primary TypePentode
SectionsSingle
Filament / Heater
Heater NotesIndirect heating by A.C. or D.C.; parallel supply
Absolute Maximum Ratings
Plate Voltage750 V
Plate Dissipation45 W
Grid 2 Voltage750 V
Grid 1 Voltage-1.3 V
Cathode Current200 mA
H-C Voltage50 V
Audio Performance
Typical THD5%
Power Output140 W
Key Features
- Indirectly heated
- High power output
- Side-contact base
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical Characteristic 1 | 500 V | 14000 | 33000 | 16.5 | 87 mA |
| Typical Characteristic 2 | 750 V | 8000 | 50000 | 16.5 | 60 mA |
| Class B Push-Pull | 750 V | — | — | — | 145 mA |
Application Notes
Suitable for Class B and Class AB push-pull audio output stages.
Datasheets
Datasheet: EL51.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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