Tube-number record
DET 27
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DET 27 is a tube type in the TubeDatabase archive (class: Triode). Recorded specifications: brand Marconi, construction Triode, maximum plate voltage 2700 V, and maximum plate dissipation 250 W. The archive does not yet hold a photographed example of this type.
BrandMarconi
ClassTriode
Construction
Primary TypeTriode
EnvelopeGlass
SectionsSingle
Filament / Heater
MaterialThoriated tungsten
Absolute Maximum Ratings
Plate Voltage2700 V
Plate Dissipation250 W
Grid 1 Voltage-300 V
Cathode Current500 mA
Audio Performance
Typical THD5%
Power Output900 W
Key Features
- Thoriated tungsten filament
- Suitable for RF power amplifier or oscillator up to 3 MHz
- Audio power amplifier
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| RF Power Amplifier Class C Telegraphy | 2000 V | 9000 | 2450 | 22 | 450 mA |
| RF Power Amplifier Class C Anode Modulated | 1600 V | 9000 | 2450 | 22 | 325 mA |
| AF Amplifier Class AB1 (Per Valve) | 2500 V | 9000 | 2450 | 22 |
Application Notes
The valve must be mounted vertically with the anode uppermost. Adequate ventilation must be provided to ensure the bulb temperature does not exceed 250°C.
Datasheets
Datasheet: DET27.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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