Tube-number record
VOLTAGE AMPLIFYING PENTODE
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ClassPentode
BaseNoval (B9A)
Filament6.3 V @ 200 mA
Construction
Primary TypePentode
EnvelopeGlass
SectionsSingle
Filament / Heater
Absolute Maximum Ratings
Plate Voltage300 V
Plate Dissipation1 W
Grid 2 Voltage200 V
Cathode Current6 mA
H-C Voltage100 V
Audio Performance
Key Features
- Special quality
- Low noise
- Low hum
- Shock resistant
- Vibration resistant
- Statistically controlled major electrical characteristics
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Pentode | 250 V | 2000 | 2500000 | 38 | 3 mA |
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