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

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Tube-number record

HIGH-FREQUENCY PENTODE WITH TWO CONTROL GRIDS

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ClassPentode
BaseNoval (B9A)
Filament6.3 V @ 300 mA

Construction

Primary Type
Pentode
EnvelopeGlass
Base MaterialGlass
SectionsSingle

Filament / Heater

Heater NotesIndirectly heated cathode

Absolute Maximum Ratings

Plate Voltage250 V
Plate Dissipation3 W
Grid 2 Voltage120 V
Grid 1 Voltage-100 V
Cathode Current35 mA
H-C Voltage150 V

Audio Performance

Key Features
  • Two control grids
  • Indirectly heated cathode
  • Designed for wide-band amplifiers

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Wide-band amplifier200 V10000100000—6.5 mA

Application Notes

High-frequency pentode intended for use in wide-band amplifiers of electronic devices. Capable of operating in vibrating environments up to 2g and impact loads up to 15g.

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