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

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Tube-number record

2C40-A

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BrandGeneral Electric
ClassPlanar Triode
BasePlanar / disc seal
Filament6.3 V @ 750 mA

Construction

Primary TypeTriode
EnvelopeLighthouse
SectionsSingle

Filament / Heater

Heater NotesCoated Unipotential

Absolute Maximum Ratings

Plate Voltage500 V
Plate Dissipation6.5 W
Grid 1 Voltage-50 V
Cathode Current25 mA
H-C Voltage90 V

Audio Performance

Key Features
  • Lighthouse construction
  • Planar electrode arrangement
  • Integral cathode RF bypass capacitor
  • Low loss envelope
  • Coaxial circuit compatible

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Average Characteristics250 V5100—3517 mA
Radio-Frequency Oscillator250 V———20 mA

Application Notes

Designed for use as a CW oscillator, radio-frequency amplifier, or plate-pulsed oscillator at frequencies as high as 3370 megacycles.

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