42 M.P./PEN.
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BrandCossor
ClassOutput Pentode
Filament4V @ 2mA
Construction
Primary TypePentode
SectionsSingle
Filament / Heater
Heater NotesIndirectly Heated
Absolute Maximum Ratings
Plate Voltage250 V
Grid 2 Voltage250 V
Audio Performance
Key Features
- Indirectly heated
- High slope
- Pentode output valve
- Capable of very large undistorted volume
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A | 250V | 7000 | - | - | 32mA |
| Class A | 200V | - | - | - | 28mA |
Application Notes
Characterised by an exceptionally high slope, which enables it to deliver full output for a very small input. May be fed directly from a double diode detector such as the Cossor D.D.4.
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