Tube-number record
479
0 archive entries
479 is a tube type in the TubeDatabase archive (class: Double Power Triode). Recorded specifications: construction Triode, maximum plate voltage 450 V, and maximum plate dissipation 26 W. The archive does not yet hold a photographed example of this type.
ClassDouble Power Triode
Filament6.3 V @ 3 mA
Construction
Primary TypeTriode
Sections2
Filament / Heater
Heater NotesNormalized from OCR fragments '60' and '300'
Absolute Maximum Ratings
Plate Voltage450 V
Plate Dissipation26 W
Cathode Current200 mA
Audio Performance
Key Features
- Twin section power triode
- High current capability
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical | 250 V | 10200 | — | 15 | 100 mA |
| Maximum Supply | 450 V | — | — | — | 200 mA |
Application Notes
Characteristics extracted from characteristic curves showing grid steps of 10V (A0, A0I, AOI).
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