Tube-number record
5/28AM
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BrandFerranti
ClassUltra High Resolution Display Tube
BaseDuodecal
Filament6.3 V @ 300 mA
Construction
Primary TypeDisplay / CRT
EnvelopeGlass
SectionsSingle
Filament / Heater
Heater NotesIndirectly heated
Absolute Maximum Ratings
Plate Voltage25000 V
H-C Voltage200 V
Audio Performance
Key Features
- Optically flat face
- Ground internal and external surfaces
- Metal-backed screens
- Fine particle size
- Magnetic focus
- Magnetic deflection
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical Anode Voltage Operation | 15000 V | — | — | — | — |
Application Notes
X-RAY WARNING: When operated at an anode voltage in excess of 16 kV, shielding may be required to protect against harmful X-ray radiation.
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