27UP4
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BrandNational Video Corporation
ClassCathode Ray Tube
BaseB6-43
Filament6.3V @ 0.6mA
Construction
Primary TypeCRT
EnvelopeGlass
Sections1
Filament / Heater
Heater NotesIndirectly heated cathode
Absolute Maximum Ratings
Plate Voltage20000 V
Grid 2 Voltage500 V
Grid 1 Voltage-125 V
H-C Voltage180 V
Audio Performance
Key Features
- Electrostatic focus
- Magnetic deflection
- Rectangular glass bulb
- Gray glass faceplate
- External ion-trap magnet required
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Direct View Picture | 16000V | - | - | - | 0.1mA |
Application Notes
Shielding of x-ray radiation may be necessary when operated in excess of 16 kilovolts. Grid number four is the focus control electrode.
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