Tube-number record
HF-130/211-C
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BrandAmperex
ClassTransmitting Tube
Base4-pin
Construction
Primary TypeTriode
EnvelopeGlass
Base MaterialStandard Jumbo 4-Pin Bayonet
SectionsSingle
Filament / Heater
MaterialThoriated Tungsten
Absolute Maximum Ratings
Plate Voltage1250 V
Plate Dissipation125 W
Grid 1 Voltage-400 V
Cathode Current210 mA
Audio Performance
Typical THD3%
Power Output21 W
Key Features
- Radiation Cooled
- Thoriated Tungsten Filament
- High Power Output
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| A.F. Power Amplifier Class A | 1200 V | 4300 | — | 12.5 | 80 mA |
| Class C Telegraphy | 1250 V | — | — | — | 200 mA |
| Class B A.F. Modulator (Two Tubes) | 1250 V | — | — | — |
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