Tube-number record
PENA4
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BrandMullard
ClassOutput Pentode
Filament4 V @ 1.95 mA
Construction
Primary TypePentode
EnvelopeClear
Sectionssingle
Filament / Heater
Heater NotesIndirectly heated cathode
Absolute Maximum Ratings
Plate Voltage250 V
Plate Dissipation9 W
Grid 2 Voltage250 V
Audio Performance
Typical THD10%
Power Output3.8 W
Key Features
- Quick-heating cathode
- High sensitivity
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A | 250 V | 9500 | 50000 | — | 36 mA |
Application Notes
The PenA4 should only be used with the 1W4/350 rectifier.
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