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

Other (3,257 tube types), Pre (2,314 tube types), Power (1,030 tube types), Rectifier (740 tube types)
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Tube-number record

8912

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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
Heater NotesUnipotential 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

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.

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