Tube-number record
FW-204
0 archive entries
FW-204 is a tube type in the TubeDatabase archive (class: Direct View Storage Cathode-Ray Tube (IATRON)). Recorded specifications: brand ITT, year 1961, construction Other / special, and maximum plate voltage 12000 V. The archive does not yet hold a photographed example of this type.
BrandITT
ClassDirect View Storage Cathode-Ray Tube (IATRON)
Filament6.3 V @ 2100 mA
Construction
Primary TypeOther / special
EnvelopeGlass
SectionsWriting gun and flood gun
Filament / Heater
MaterialCathode
Warm-up Time60s
Heater NotesFlood Gun Heater: 2.1A; Writing Gun Heater: 0.6A
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Flood Section | 10000 V | — | — | — | 0.6 mA |
| Write Section | -2500 V | — | — | — | 2 mA |
Application Notes
The viewing screen voltage should be limited to 12 kV. Full voltage should not be applied instantaneously; an RC filter is recommended. Power supply should have a series resistance of at least 1 Megohm.
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