Tube-number record
TDO3-5
0 archive entries
TDO3-5 is a tube type in the TubeDatabase archive (class: Disc Seal Triode). Recorded specifications: brand Mullard, construction Triode, base Metal/Ceramic, socket Planar / disc seal, maximum plate voltage 350 V, and maximum plate dissipation 5 W. The archive does not yet hold a photographed example of this type.
BrandMullard
ClassDisc Seal Triode
BasePlanar / disc seal
Construction
Primary TypeTriode
EnvelopeDisc Seal
Base MaterialMetal/Ceramic
SectionsSingle
Filament / Heater
Absolute Maximum Ratings
Plate Voltage350 V
Plate Dissipation5 W
Cathode Current25 mA
Audio Performance
Key Features
- Disc seal construction
- Natural cooling
- R.F. amplifier application
- Mounting position: Any
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| R.F. amplifier | 250 V | — | — | 70 | 10 mA |
Application Notes
Anode seal temperature must be limited; mass of metal in close thermal contact with anode disc should not be less than 45g of brass.
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