Tube-number record
DET 18
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DET 18 is a tube type in the TubeDatabase archive (class: Transmitting Triode). Recorded specifications: brand Marconi, construction Triode, maximum plate voltage 2000 V, and maximum plate dissipation 50 W. The archive does not yet hold a photographed example of this type.
BrandMarconi
ClassTransmitting Triode
Construction
Primary TypeTriode
EnvelopeGlass
SectionsSingle
Filament / Heater
MaterialThoriated Tungsten
Absolute Maximum Ratings
Plate Voltage2000 V
Plate Dissipation50 W
Cathode Current900 mA
Audio Performance
Key Features
- Thoriated tungsten filament
- HF power amplifier and oscillator
- High frequency operation up to 120 Mc/s
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class C Telegraphy (HF Power Amplifier) | 1500 V | 2550 | 12745 | 32.5 | 85 mA |
| Class C Telegraphy (HF Power Amplifier) | 1000 V | 2550 | — | 32.5 | 110 mA |
| Class C Telegraphy (HF Power Amplifier) | 750 V | 2550 | — | 32.5 |
Application Notes
The valve must be mounted vertically. Connections to the anode lead should be made via a clip; do not solder directly to the lead.
Datasheets
Datasheet: DET18.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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