MF 31-22
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BrandPHILIPS
ClassRadar Tube
BaseDuodecal 7p
Filament6.3V @ 300mA
Construction
Primary TypeRadar indicator tube
EnvelopeMetal-backed (aluminized) screen
SectionsSingle gun
Filament / Heater
Heater NotesIndirect heating, series or parallel supply. In series chain, heater voltage must not exceed 9.5V when switched on.
Absolute Maximum Ratings
Plate Voltage12000 V
Grid 2 Voltage450 V
Grid 1 Voltage-200 V
H-C Voltage150 V
Audio Performance
Key Features
- Metal-backed screen (aluminized)
- Indirectly heated
- Magnetic deflection
- Magnetic focusing
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical Operation | 9000V | - | - | - | - |
Application Notes
The tube has a screen which is liable to burn if a stationary or slowly moving spot is used even with low values of mean beam current.
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