25B6G
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BrandSylvania
ClassPower Pentode
BaseOctal
Filament25V @ 300mA
Construction
Primary TypePentode
EnvelopeST-14
Sections1
Filament / Heater
Heater NotesAC or DC
Absolute Maximum Ratings
Plate Voltage180 V
Plate Dissipation9.5 W
Grid 2 Voltage135 V
Audio Performance
Typical THD14%
Power Output4.3 W
Key Features
- Power Pentode
- Designed for universal and DC 110V receivers
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A Amplifier (Condition 1) | 105V | 4800 | 15500 | - | 48mA |
| Class A Amplifier (Condition 2) | 135V | 5000 | 15000 | - | 61mA |
Application Notes
The Sylvania 25B6G is a power amplifier pentode specifically intended for the output stage of universal and 110V DC receivers. While similar to types 25A6G and 43, it possesses significant characteristic differences.
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