Tube-number record
DUO-DIODE POWER AMPLIFIER PENTODE
0 archive entries
DUO-DIODE POWER AMPLIFIER PENTODE is a tube type in the TubeDatabase archive (class: Power Pentode). Recorded specifications: construction Multi-section, socket Noval (B9A), maximum plate voltage 250 V, and maximum plate dissipation 10 W. The archive does not yet hold a photographed example of this type.
ClassPower Pentode
BaseNoval (B9A)
Filament6.3 V @ 800 mA
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 | 180 V | 8000 | 180000 | — | 20 mA |
| Class A1 | 250 V | 10000 | 100000 | — | 38 mA |
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