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Tube Database (7,341 tube types · 1,270 archive entries)

Pre (2,630 tube types), Other (2,603 tube types), Power (1,292 tube types), Rectifier (816 tube types)
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8912 vacuum tube outline illustration

Tube-number record

8912

0 archive entries

8912 is a tube type in the TubeDatabase archive (class: Planar Triode). Recorded specifications: brand EIMAC (Varian), year 1971, construction Triode, base Metal, socket Planar / disc seal, maximum plate voltage 2000 V, and maximum plate dissipation 50 W. The archive does not yet hold a photographed example of this type.

BrandEIMAC (Varian)
ClassPlanar Triode
BasePlanar / disc seal
Filament6.3 V @ 650 mA

Construction

Primary TypeTriode
EnvelopeCeramic/Metal
Base MaterialMetal
SectionsSingle

Filament / Heater

MaterialOxide Coated
Warm-up Time60s

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
General Characteristics—30000—85—

Application Notes

Intended for CW plate- or grid-pulsed oscillator, amplifier, or frequency multiplier use. Readily lends itself to cavity circuit operation.

Filters

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Manufacturers

Brands

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    Heater Notes
    Unipotential cathode

    Absolute Maximum Ratings

    Plate Voltage2000 V
    Plate Dissipation50 W
    Grid 1 Voltage-100 V
    Cathode Current100 mA
    H-C Voltage50 V

    Audio Performance

    Key Features
    • Compact
    • Rugged ceramic/metal construction
    • High power output
    • High plate dissipation
    • Excellent frequency stability