Tube-number record
4033-A
0 archive entries
4033-A is a tube type in the TubeDatabase archive (class: Triode). Recorded specifications: brand Standard Valves, construction Triode, socket 5-pin, maximum plate voltage 600 V, and maximum plate dissipation 25 W. The archive does not yet hold a photographed example of this type.
BrandStandard Valves
ClassTriode
Base5-pin
Filament6 V @ 1.4 mA
Construction
Primary TypeTriode
EnvelopeGlass
SectionsSingle
Filament / Heater
Heater NotesIndirectly heated oxide coated, constant voltage type.
Absolute Maximum Ratings
Plate Voltage600 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Static Constants | 300 V | 9000 | 1670 | 5 | 50 mA |
| Class A A.F. Amp | 400 V | — | — | — | 50 mA |
| Class B A.F. Amp (Balanced 2-valve) | 600 V | — | — | — | 80 mA |
Application Notes
The 4033-AF code indicates special tests for Standard Aircraft radio. Individual biasing is required for each valve in Class B circuits.
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