Tube-number record
233
0 archive entries
233 is a tube type in the TubeDatabase archive (class: Power Pentode). Recorded specifications: construction Pentode, socket 4-pin, maximum plate voltage 180 V, and maximum plate dissipation 3.5 W. The archive does not yet hold a photographed example of this type.
ClassPower Pentode
Base4-pin
Construction
Primary TypePentode
EnvelopeGlass
SectionsSingle
Filament / Heater
MaterialThoriated Tungsten
Absolute Maximum Ratings
Plate Voltage180 V
Plate Dissipation3.5 W
Grid 2 Voltage180 V
Audio Performance
Typical THD10%
Power Output1.4 W
Key Features
- Low filament current
- High power sensitivity
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A Amplifier | 180 V | 1450 | 50000 | 70 | 22 mA |
Application Notes
The 233 is a power amplifier pentode designed for use in the output stage of battery-operated receivers.
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