DUO-DIODE POWER AMPLIFIER PENTODE
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ClassPower Pentode
BaseNoval (B9A)
Filament6.3V @ 800mA
Construction
Primary TypeMulti-section
EnvelopeGlass
Sections3
Filament / Heater
Heater NotesOperation with no external shield
Absolute Maximum Ratings
Plate Voltage250 V
Plate Dissipation10 W
Grid 2 Voltage250 V
H-C Voltage90 V
Audio Performance
Typical THD10%
Power Output4 W
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A1 | 180V | 8000 | 180000 | - | 20mA |
| Class A1 | 250V | 10000 | 100000 | - | 38mA |
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