Tube-number record
DA 250
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DA 250 is a tube type in the TubeDatabase archive (class: Power Triode). Recorded specifications: brand Marconi, construction Triode, base Metal, socket 4-pin, maximum plate voltage 2500 V, and maximum plate dissipation 250 W. The archive does not yet hold a photographed example of this type.
BrandMarconi
ClassPower Triode
Base4-pin
Construction
Primary TypeTriode
EnvelopeGlass
Base MaterialMetal
SectionsSingle
Filament / Heater
Materialoxide-coated
Absolute Maximum Ratings
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class AB1 Push-Pull (Pair) | 2500 V | 7000 | 2300 | 16 | 360 mA |
| Class AB2 Push-Pull (Pair) | 2500 V | 7000 | 2300 | 16 | 500 mA |
Application Notes
The peak anode dissipation under Class AB2 push-pull conditions occurs at approximately half full output. Power supply impedance should not exceed 400 Ohms.
Datasheets
Datasheet: DA250.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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