Tube-number record
TD04-20
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BrandMullard
ClassDisc Seal Triode
BasePlanar / disc seal
Filament6.3 V @ 1 mA
Construction
Primary TypeTriode
EnvelopeMetal-Glass Disc Seal
SectionsSingle
Filament / Heater
Heater NotesIndirectly heated
Absolute Maximum Ratings
Plate Voltage400 V
Plate Dissipation20 W
Cathode Current150 mA
Audio Performance
Power Output13.5 W
Key Features
- Disc seal construction
- Natural cooling
- Low lead inductance
- Designed for UHF amplifier or oscillator applications
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Characteristics | 400 V | 10000 | — | 28 | 50 mA |
Application Notes
In order to limit the anode seal temperature and also to limit the rate of change of temperature it is necessary that the mass of metal in close thermal contact with the anode disc should not be less than 120g of brass or its thermal equivalent.
Datasheets
Datasheet: TD04-20.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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