Tube-number record
FW-211
0 archive entries
FW-211 is a tube type in the TubeDatabase archive (class: Storage Cathode-Ray Tube). Recorded specifications: brand ITT, year 1961, construction Display / CRT, base Shoulder Stem pins, socket Special / none, and maximum plate voltage 10000 V. The archive does not yet hold a photographed example of this type.
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
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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