Tube-number record
TB 4/800
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TB 4/800 is a tube type in the TubeDatabase archive (class: Triode). Recorded specifications: brand Philips, construction Triode, base Metal/Bayonet, socket Jumbo, maximum plate voltage 4000 V, and maximum plate dissipation 250 W. The archive does not yet hold a photographed example of this type.
BrandPhilips
ClassTriode
BaseJumbo
Construction
Primary TypeTriode
EnvelopeGlass
Base MaterialMetal/Bayonet
SectionsSingle
Filament / Heater
Materialthoriated tungsten
Absolute Maximum Ratings
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical characteristics | 3000 V | 5600 | — | 37 | 300 mA |
| H.F. class C telegraphy | 4000 V | — | — | — | 313 mA |
| L.F. class B amplifier (2 tubes) | 3000 V | — | 12200 | — |
Application Notes
TRIODE for use as H.F. or L.F. amplifier or oscillator. Mounting position vertical with base up or down.
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