Tube-number record
9/25AM
0 archive entries
9/25AM is a tube type in the TubeDatabase archive (class: High Resolution Display Tube). Recorded specifications: brand Ferranti, year 1961, construction Display / CRT, socket Duodecal, and maximum plate voltage 30000 V. The archive does not yet hold a photographed example of this type.
BrandFerranti
ClassHigh Resolution Display Tube
BaseDuodecal
Filament6.3 V @ 300 mA
Construction
Primary TypeDisplay / CRT
Envelope9 inch diameter optically flat face
SectionsSingle
Filament / Heater
Heater NotesIndirectly heated
Absolute Maximum Ratings
Plate Voltage30000 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical | 20000 V | — | — | — | — |
Application Notes
X-ray warning: Shielding may be required if anode voltage exceeds 16 kV.
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