Tube-number record
HT 311
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BrandVEB Werk für Fernsehelektronik Berlin
ClassHöchstfrequenztriode
BaseCoaxial
Filament12.6 V @ 800 mA
Construction
Primary TypeTriode
EnvelopeMetal-Ceramic
SectionsSingle
Filament / Heater
Heater NotesHeater voltage must be reduced at frequencies above 400 MHz: 400-1000 MHz (12.1 V), 1000-2000 MHz (11.5 V), >2000 MHz (10.8 V).
Absolute Maximum Ratings
Plate Voltage2000 V
Plate Dissipation80 W
Grid 1 Voltage-150 V
Cathode Current125 mA
Audio Performance
Key Features
- Air-cooled
- Metal-ceramic technology
- Concentric electrode connections
- Operation up to 3.75 GHz
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Static | 400 V | 10000 | — | 90 | 15 mA |
| Oscillator Mode 1 | 500 V | — | — | — | 100 mA |
| Oscillator Mode 2 | 800 V | — | — | — | 100 mA |
Application Notes
At frequencies above 400 MHz, the heater voltage must be reduced to ensure long life. Values provided for continuous wave (CW) operation.
Datasheets
Datasheet: HT311.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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