U.21
0 Tubes in archive
BrandMazda
ClassHigh Voltage Rectifier
Base4-pin
Filament2V @ 1850mA
Construction
Primary TypeIndirectly heated half-wave rectifier
EnvelopeGlass
SectionsSingle
Filament / Heater
Heater NotesDesigned to provide suitable time delay
Absolute Maximum Ratings
Plate Voltage4500 V
Cathode Current5 mA
Audio Performance
Key Features
- Indirectly heated
- Time delay heating
- High voltage television supply
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Rectifier (RMS 3700V) | 3700V | - | - | - | 0.5mA |
| Rectifier (RMS 4000V) | 4000V | - | - | - | 0.5mA |
| Rectifier (RMS 4500V) | 4500V | - | - | - | 0.5mA |
Application Notes
The U.21 avoids the use of special delay switching and protects the cathode ray tube from excessive voltage stress during heating time.
Datasheet Viewer
Loading datasheet...
Sort by
Showing 1 to 0 of 0 results