Tube-number record
213
0 archive entries
213 is a tube type in the TubeDatabase archive (class: Full-Wave Vacuum Rectifier). Recorded specifications: construction Diode, socket 4-pin, and maximum plate voltage 220 V. The archive does not yet hold a photographed example of this type.
ClassFull-Wave Vacuum Rectifier
Base4-pin
Construction
Primary TypeDiode
Rectifier TypeFull-Wave
EnvelopeGlass
Sections2
Filament / Heater
MaterialThoriated Tungsten
Absolute Maximum Ratings
Plate Voltage220 V
Cathode Current65 mA
Audio Performance
Key Features
- Full-wave rectification
- Filamentary cathode
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Full-Wave Rectifier | 220 V | — | — | — | 65 mA |
Application Notes
Early standard full-wave rectifier used in battery eliminators and power supplies.
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