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

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GROUNDED GRID TRIODE

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GROUNDED GRID TRIODE is a tube type in the TubeDatabase archive (class: UHF Triode). Recorded specifications: construction Triode, socket Planar / disc seal, maximum plate voltage 350 V, and maximum plate dissipation 3 W. The archive does not yet hold a photographed example of this type.

ClassUHF Triode
BasePlanar / disc seal
Filament6.3 V @ 0.4 mA

Construction

Primary TypeTriode
EnvelopeGlass with metal disc
SectionsSingle

Filament / Heater

Absolute Maximum Ratings

Plate Voltage350 V
Plate Dissipation3 W

Audio Performance

Key Features
  • Designed for UHF operation at 600 Mc/s
  • Low feedback capacity
  • Concentric thimble for heater and cathode
  • Indirectly heated oxide-coated cathode
  • Cathode strapped internally to one heater lead

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Grounded Grid UHF Amplifier250 V15000—100—

Application Notes

The valve is designed to mount by means of the grid disc between coaxial lines. Used in a pre-amplifier, it improves signal to noise ratio performance of UHF receivers. Grid is typically auto-biased through 150 ohms.

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