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811-A

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ClassPower Triode

Construction

Primary TypeTriode
EnvelopeGlass
Sections1

Filament / Heater

MaterialThoriated Tungsten

Absolute Maximum Ratings

Plate Voltage1500 V
Plate Dissipation65 W
Grid 1 Voltage-200 V

Audio Performance

Power Output340 W
Key Features
  • High-mu triode
  • Directly heated cathode

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Class B (Two Tubes)1500V--160156mA
Class C Telegraphy (ICAS)1500V---173mA

Application Notes

Used primarily in Class B audio modulators and Class C RF power amplifiers.

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