Tube-number record
FW-223
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BrandITT
ClassDirect View Storage Cathode-Ray Tube
Filament6.3 V @ 2.1 mA
Construction
Primary TypeDisplay / CRT
Envelope5 inch glass
SectionsDual (Writing gun and Flood gun)
Filament / Heater
Warm-up Time60s
Heater NotesFlood gun heater current 2.1A; Write gun heater current 0.6A.
Absolute Maximum Ratings
Plate Voltage12000 V
Audio Performance
Key Features
- Direct View Storage
- Magnetic Deflection
- Electrostatic Focus
- Aluminized P-20 Phosphor
- Bright visual display
- Grey shades capability
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Flood Section | 10000 V | — | — | — | — |
| Write Section | -1000 V | — | — | — | — |
Application Notes
Viewing screen voltage should be limited to 12 kV. Power supply should include an RC filter to prevent instantaneous voltage application and a 1 Megohm series resistance. Apply deflection voltages before the writing beam to prevent phosphor burn.
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