Tube-number record
9/28PM
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BrandFerranti
ClassCathode Ray Tube
BaseDuodecal
Filament6.3 V @ 300 mA
Construction
Primary TypeDisplay / CRT
Envelope9 inch diameter optically flat face with ground internal and external surfaces
SectionsSingle
Filament / Heater
Absolute Maximum Ratings
Plate Voltage30000 V
H-C Voltage200 V
Audio Performance
Key Features
- Optically flat face
- High resolution
- Magnetic focus
- Magnetic deflection
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical Operation | 15000 V | — | — | — | — |
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