31C2
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BrandMAZDA
ClassCathode Ray Tube
BaseB12A
Filament4V @ 720mA
Construction
Primary TypeMagnetic Aluminised Cathode Ray Tube
EnvelopeConcave face
SectionsSingle
Filament / Heater
Heater NotesHeater and cathode should be connected at same DC potential.
Absolute Maximum Ratings
Plate Voltage10000 V
Audio Performance
Key Features
- Magnetic Aluminised
- High Brightness Level
- Internal compass scale
- Concave face
- Specular reflection reduction
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical Operation | 9500V | - | - | - | 0.15mA |
Application Notes
Specifically designed for Radio D.F. Compass. The 31C2 has an internal compass scale uniformly graduated. Cathode modulation requires a resistance not exceeding 100,000 Ohms between heater and cathode. Anode circuit should limit discharge current to 100 mA maximum in event of flash-over.
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