DET 19
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BrandMarconi
ClassLow-power transmitting twin triode
Base9-pin
Filament6.3V @ 800mA
Construction
Primary TypeTwin Triode
EnvelopeGlass
Sections2
Filament / Heater
Absolute Maximum Ratings
Plate Voltage300 V
Plate Dissipation5 W
Grid 1 Voltage-150 V
Cathode Current80 mA
H-C Voltage100 V
Audio Performance
Power Output15.9 W
Key Features
- Suitable for use as power amplifier, oscillator or frequency multiplier
- Low-power transmitting valve
- Requires neutralization in amplifier service
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Push-Pull RF Amplifier Class C Telegraphy | 300V | 2100 | 3340 | 7 | 80mA |
| Push-Pull Anode Modulated RF Amplifier Class C Telephony | 250V | - | - | - | 50mA |
| Push-Pull RF Amplifier Class B Telephony | 300V | - | - | - | 40mA |
Application Notes
The valve must be adequately ventilated as it becomes very hot under normal operating conditions. No visible heating of the anodes should occur.
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