EL34
107 Tubes in archive
BrandMullard
ClassOutput Pentode
BaseOctal
Filament6.3V @ 1.5mA
Construction
Primary TypePentode
EnvelopeGlass
Base MaterialPlastic
SectionsSingle
Filament / Heater
Heater Notesa.c. mains operated
Absolute Maximum Ratings
Plate Voltage800 V
Plate Dissipation25 W
Grid 2 Voltage500 V
Cathode Current150 mA
H-C Voltage100 V
Audio Performance
Typical THD10%
Power Output11 W
Key Features
- 25W anode dissipation
- Distributed load conditions (Ultra-linear)
- Fixed or Cathode bias capability
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Pentode | 250V | 11000 | 15000 | 11 | 100mA |
| Triode | 250V | 11500 | 910 | 10.5 | 70mA |
Application Notes
Pout and Dtot are measured at fixed bias and represent power available during speech and music reproduction. Reduction of 10% occurs with sustained sine wave due to bias readjustment.
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