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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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G240/2D vacuum tube outline illustration

Tube-number record

G240/2D

0 archive entries

G240/2D is a tube type in the TubeDatabase archive (class: Cold-Cathode Gas-Filled Triode). Recorded specifications: brand Standard Telephones and Cables Limited, construction Triode, base Metal Shell, socket Octal, and maximum plate voltage 230 V. The archive does not yet hold a photographed example of this type.

BrandStandard Telephones and Cables Limited
ClassCold-Cathode Gas-Filled Triode
BaseOctal

Construction

Primary TypeTriode
EnvelopeGlass
Base MaterialMetal Shell
SectionsSingle

Filament / Heater

Absolute Maximum Ratings

Plate Voltage230 V

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Maintaining Voltage70 V———20 mA

Application Notes

Developed for use in applications where higher power is needed in the anode circuit than obtainable with the G150/2D type.

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    Grid 1 Voltage90 V
    Cathode Current30 mA

    Audio Performance

    Key Features
    • Long life cathode
    • Non-interchangeability of trigger and cathode electrodes
    • Higher power than G150/2D