DET22
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BrandMarconi
ClassTriode
BaseDisc Seal
Filament6.3V @ 0.4mA
Construction
Primary TypeTriode
EnvelopeDisc Seal
SectionsSingle
Filament / Heater
Heater NotesIndirectly heated oxide-coated cathode
Absolute Maximum Ratings
Plate Voltage350 V
Plate Dissipation10 W
Cathode Current40 mA
Audio Performance
Key Features
- Disc seal triode
- No internal feedback
- Common-grid operation
- VHF/UHF performance
- Earthed-anode concentric-line oscillator
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| RF Oscillator/Amplifier | 250V | 6000 | 5000 | 30 | 20mA |
Application Notes
Intended mainly as a common-grid, earthed-anode, concentric-line oscillator, but may also be used as a power amplifier. Cooling requires a mass of metal in close thermal contact with the anode disc (not less than 60 gm of brass).
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