295A
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BrandWestern Electric
ClassTriode
BaseLarge four-pin bayonet
Construction
Primary TypeFilamentary air-cooled triode
EnvelopeGlass
Base MaterialBayonet
SectionsSingle
Filament / Heater
MaterialThoriated tungsten
Absolute Maximum Ratings
Plate Voltage1250 V
Plate Dissipation100 W
Cathode Current175 mA
Audio Performance
Typical THD5%
Power Output250 W
Key Features
- Air-cooled
- Thoriated tungsten filament
- Graphite anodes
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Static Characteristics | 1250V | 4200 | 6000 | 25 | 80mA |
| Class B Audio Amplifier (2 tubes) | 1250V | - | - | - | 160mA |
| Class C RF Oscillator | 1250V | - | - | - | 150mA |
Application Notes
The tube should not be subjected to mechanical shock. A free circulation of air must be provided. Graphite anodes should not show a red color during operation. Overload protection should trigger if plate current exceeds 200 mA.
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