HF 140
0 Tubes in archive
BrandAmperex
ClassPower Triode
Construction
Primary Typetriode
Envelopeglass
Sections1
Filament / Heater
Materialthoriated tungsten
Absolute Maximum Ratings
Plate Voltage1250 V
Plate Dissipation100 W
Grid 1 Voltage-400 V
Cathode Current175 mA
Audio Performance
Typical THD5%
Power Output20 W
Key Features
- High frequency operation
- Thoriated tungsten filament
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A AF Power Amplifier | 1250V | 4500 | 2666 | 12 | 60mA |
| Class B AF Power Amplifier (Two Tubes) | 1250V | - | - | 12 | 320mA |
| Class C RF Telegraphy | 1250V | - | - | 12 | 166mA |
Application Notes
Used as R.F. Power Amplifier, Oscillator, or A.F. Power Amplifier/Modulator.
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