Tube-number record
RF POWER PENTODE
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BrandAmperex
ClassPower Pentode
BaseNoval (B9A)
Construction
Primary TypePentode
EnvelopeT 6-1/2
SectionsSingle
Filament / Heater
Warm-up Time9.5s
Absolute Maximum Ratings
Plate Voltage300 V
Plate Dissipation5 W
Grid 2 Voltage300 V
Grid 1 Voltage-100 V
Cathode Current50 mA
Audio Performance
Key Features
- Instant heating
- RF power pentode
- Power amplifier
- Frequency doubler
- Mobile equipment
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class C Telegraphy 50 Mc | 300 V | — | — | — | 40 mA |
| Class C Telegraphy 175 Mc | 300 V | — | — | — | 30 mA |
| Class C Frequency Doubler | 300 V | — | — | — | 30 mA |
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