Tube-number record
4C25
0 archive entries
4C25 is a tube type in the TubeDatabase archive (class: Multi-electrode high vacuum tube). Recorded specifications: brand Heintz & Kaufman, Ltd., construction Triode, socket 4-pin, maximum plate voltage 3000 V, and maximum plate dissipation 50 W. The archive does not yet hold a photographed example of this type.
BrandHeintz & Kaufman, Ltd.
ClassMulti-electrode high vacuum tube
Base4-pin
Construction
Primary TypeTriode
EnvelopeGlass
Filament / Heater
MaterialThoriated Tungsten
Absolute Maximum Ratings
Plate Voltage3000 V
Plate Dissipation50 W
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class B Audio-Frequency Power Amplifier (Two Tubes) | 2000 V | — | 36000 | — | 180 mA |
| Class C Radio-Frequency Power Amplifier (Plate Modulated) | 2000 V | — | — | — | 110 mA |
| Class C Radio-Frequency Power Amplifier (Unmodulated) | 3000 V | 2800 | — |
Datasheets
Datasheet: 4C25.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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