Tube-number record
4066-A
0 archive entries
4066-A is a tube type in the TubeDatabase archive (class: Power Pentode). Recorded specifications: brand Standard Valves, construction Pentode, socket 7-pin (non-miniature), and maximum plate voltage 250 V. The archive does not yet hold a photographed example of this type.
BrandStandard Valves
ClassPower Pentode
Base7-pin (non-miniature)
Filament4 V @ 2 mA
Construction
Primary TypePentode
EnvelopeGlass
SectionsSingle
Filament / Heater
Heater NotesIndirectly heated oxide coated, Constant voltage type
Absolute Maximum Ratings
Plate Voltage250 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Standard | 250 V | 10000 | 60000 | 600 | 29 mA |
| Reduced Voltage 1 | 200 V | — | 80000 | — | 24.5 mA |
| Reduced Voltage 2 | 150 V | — | 100000 | — | 23 mA |
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