Tube-number record
290
0 archive entries
290 is a tube type in the TubeDatabase archive (class: Radial Beam Power Pentode). Recorded specifications: brand EIMAC (Division of Varian), construction Pentode, base Metal/Ceramic, socket 7-pin (non-miniature), maximum plate voltage 6000 V, and maximum plate dissipation 5000 W. The archive does not yet hold a photographed example of this type.
BrandEIMAC (Division of Varian)
ClassRadial Beam Power Pentode
Base7-pin (non-miniature)
Filament6 V @ 17 mA
Construction
Primary TypePentode
EnvelopeCeramic/Metal
Base MaterialMetal/Ceramic
SectionsSingle
Filament / Heater
MaterialOxide Coated
Warm-up Time5s
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class AB1, Grid Driven (Peak Envelope) | 5000 V | 37000 | — | — | 1360 mA |
| Class AB1, Grid Driven (Peak Envelope) | 5000 V | 37000 | — | — | 1690 mA |
| Class AB1, Grid Driven (Peak Envelope) | 6000 V | 37000 | — | — |
Application Notes
Suitable for Class AB1 amplifier applications and broad-band linear amplifiers. Forced-air cooling must be applied before or simultaneously with electrode voltages.
Datasheets
Datasheet: 290.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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