Tube-number record
HK-57
0 archive entries
HK-57 is a tube type in the TubeDatabase archive (class: Beam Pentode). Recorded specifications: brand Heintz and Kaufman, construction Beam tetrode / beam power, base Enclosed Cylindrical Tantalum, socket Special / none, maximum plate voltage 3000 V, and maximum plate dissipation 50 W. The archive does not yet hold a photographed example of this type.
BrandHeintz and Kaufman
ClassBeam Pentode
BaseSpecial / none
Construction
Primary TypeBeam tetrode / beam power
EnvelopeNonex Glass
Base MaterialEnclosed Cylindrical Tantalum
SectionsSingle
Filament / Heater
MaterialThoriated Tungsten
Absolute Maximum Ratings
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Radio Frequency Power Amplifier Class C Unmodulated | 3000 V | — | — | — | 100 mA |
| Radio Frequency Power Amplifier Class C Unmodulated | 2000 V | — | — | — | 110 mA |
| Radio Frequency Power Amplifier Class C Plate Modulated | 2500 V | — | — |
Application Notes
The HK-57 is capable of very high frequency operation and does not require neutralization. It has very low driving power requirements and can withstand large momentary overloads due to tantalum construction.
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