HK-454
0 Tubes in archive
BrandGammatron (Heintz and Kaufman)
ClassGeneral Purpose Triode
BaseStandard Fifty Watt
Construction
Primary TypeTriode
EnvelopeNonex Glass
Base MaterialStandard 50 Watt Base
SectionsSingle
Filament / Heater
MaterialThoriated Tungsten
Absolute Maximum Ratings
Plate Voltage5000 V
Plate Dissipation250 W
Grid 1 Voltage-1000 V
Cathode Current375 mA
Audio Performance
Key Features
- Radiation cooled
- Cylindrical Tantalum plate
- Braced Vertical Bar Tantalum grid
- Copper thimble connectors
- VHF performance up to 150 mc
- 70% efficiency at 150 mc
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Radio Frequency Power Amplifier Class C Unmodulated (Low Mu) | 4000V | - | - | 13.5 | 280mA |
| Radio Frequency Power Amplifier Class C Unmodulated (High Mu) | 4000V | - | - | 27 | 280mA |
| Radio Frequency Power Amplifier Class C Plate Modulated (Low Mu) | 3500V | - | - | 13.5 | 270mA |
| Audio Frequency Power Amplifier Class B (Low Mu, 2 Tubes) | 3500V | - | - | 13.5 | 410mA |
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