Tube-number record
HIGH-FREQUENCY PENTODE WITH TWO CONTROL GRIDS
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ClassPentode
BaseNoval (B9A)
Filament6.3 V @ 300 mA
Construction
Primary TypePentode
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
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Wide-band amplifier | 200 V | 10000 | 100000 | — | 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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