FW-211
0 Tubes in archive
BrandITT
ClassStorage Cathode-Ray Tube
BaseShoulder Stem
Filament6.3V @ 0.6mA
Construction
Primary TypeDirect View Storage Tube
EnvelopeGlass
Base MaterialShoulder Stem pins
SectionsWriting and Flooding Concentric Guns
Filament / Heater
MaterialIndirectly Heated
Warm-up Time60s
Heater NotesWriting section heater 0.6A; Flooding section heater 1.2A
Absolute Maximum Ratings
Plate Voltage10000 V
Grid 2 Voltage50 V
Cathode Current16 mA
H-C Voltage125 V
Audio Performance
Key Features
- Electrostatic Focus
- Electrostatic Deflection
- P-20 Aluminized Phosphor
- Bright visual display
- Concentric electron guns
- Daylight viewing
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Flooding Section | 8500V | - | - | - | 0.25mA |
| Writing Section | -900V | - | - | - | 1.5mA |
Application Notes
Repeated bombardment with a high current focused beam on a small area of the storage surface can burn a dark image into the display. Deflection voltages should be applied before operating writing beam.
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