4066-A
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BrandStandard Valves
ClassPower Pentode
BaseStandard British 7-pin
Filament4V @ 2mA
Construction
Primary TypePentode
EnvelopeGlass
SectionsSingle
Filament / Heater
Heater NotesIndirectly heated oxide coated, Constant voltage type
Absolute Maximum Ratings
Plate Voltage250 V
Grid 2 Voltage250 V
Cathode Current40 mA
Audio Performance
Typical THD10%
Power Output2.75 W
Key Features
- Indirectly heated
- Oxide coated
- Constant voltage type
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Standard | 250V | 10000 | 60000 | 600 | 29mA |
| Reduced Voltage 1 | 200V | - | 80000 | - | 24.5mA |
| Reduced Voltage 2 | 150V | - | 100000 | - | 23mA |
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