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BrandSylvania
ClassBeam Power Pentode
Base9-pin miniature
Filament50V @ 150mA
Construction
Primary TypeBeam Power Pentode
EnvelopeT-9
Sections1
Filament / Heater
Heater NotesSeries string heater
Absolute Maximum Ratings
Plate Voltage150 V
Plate Dissipation16 W
Grid 2 Voltage150 V
H-C Voltage200 V
Audio Performance
Typical THD11%
Power Output4.5 W
Key Features
- High power sensitivity
- 9T9 design utilizes T-9 bulb on 9-pin base
- Increased heat dissipation safety margin
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A1 Amplifier | 130V | 11000 | 7000 | - | 100mA |
| Class A1 Amplifier (Cathode Bias) | 140V | - | - | - | 100mA |
| Class AB1 Push-Pull | 130V | - | - | - | 195mA |
| Class AB1 Push-Pull (Cathode Bias) | 140V | - | - | - | 210mA |
Application Notes
Can deliver 4.5 watts of power with a B+ voltage of only 130 volts.
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