6BN5
0 Tubes in archive
BrandPhilips
ClassOutput Pentode
Base9-pin Noval
Filament6.3V @ 200mA
Construction
Primary TypePentode
EnvelopeT6 1/2
SectionsSingle
Filament / Heater
Heater NotesIndirectly heated cathode
Absolute Maximum Ratings
Plate Voltage300 V
Grid 2 Voltage300 V
Cathode Current35 mA
H-C Voltage100 V
Audio Performance
Typical THD5.5%
Power Output7 W
Key Features
- Small button noval base
- Coated unipotential cathode
- High power sensitivity
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A, Single Tube | 200V | 3200 | - | 11 | 22.5mA |
| Class A, Single Tube | 225V | 3200 | - | 11 | 26mA |
| Class AB, Push-Pull | 250V | - | - | - | 40mA |
| Class B, Push-Pull | 250V | - | - | - | 10mA |
Application Notes
Commonly used as an output pentode in audio amplifiers. A reregistration (1339A) in 1956 modified the pinout connections.
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