Tube-number record
FW-211
0 archive entries
BrandITT
ClassStorage Cathode-Ray Tube
BaseSpecial / none
Filament6.3 V @ 0.6 mA
Construction
Primary TypeDisplay / CRT
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 | 8500 V | — | — | — | 0.25 mA |
| Writing Section | -900 V | — | — | — | 1.5 mA |
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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