HT 311
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BrandVEB Werk für Fernsehelektronik Berlin
ClassHöchstfrequenztriode
BaseConcentric electrode connections
Filament12.6V @ 800mA
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 | 400V | 10000 | - | 90 | 15mA |
| Oscillator Mode 1 | 500V | - | - | - | 100mA |
| Oscillator Mode 2 | 800V | - | - | - | 100mA |
Application Notes
At frequencies above 400 MHz, the heater voltage must be reduced to ensure long life. Values provided for continuous wave (CW) operation.
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