Tube-number record
P250A
0 archive entries
P250A is a tube type in the TubeDatabase archive (class: Natural Air Cooled Pentode). Recorded specifications: brand NEC, construction Pentode, base Metal/Ceramic, socket Special / none, maximum plate voltage 3000 V, and maximum plate dissipation 420 W. The archive does not yet hold a photographed example of this type.
BrandNEC
ClassNatural Air Cooled Pentode
BaseSpecial / none
Construction
Primary TypePentode
EnvelopeGlass
Base MaterialMetal/Ceramic
SectionsSingle
Filament / Heater
MaterialThoriated Tungsten
Absolute Maximum Ratings
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| AF Power Amplifier and Modulator - Class B (Values for two tubes) | 2500 V | — | 6400 | 6.5 | 800 mA |
| RF Power Amplifier and Oscillator - Class C | 3000 V | — | — | — | 480 mA |
Application Notes
Mounting Position: Vertical, Bottom Base Up or Down. Cooling: Convection and Radiation.
Datasheets
Datasheet: P250A.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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