Tube-number record
21/03TB
0 archive entries
21/03TB is a tube type in the TubeDatabase archive (class: Television Monitor Tube). Recorded specifications: brand FERRANTI, year 1959, construction Display / CRT, base Plastic, socket Duodecal, and maximum plate voltage 18000 V. The archive does not yet hold a photographed example of this type.
BrandFERRANTI
ClassTelevision Monitor Tube
BaseDuodecal
Filament6.3 V @ 300 mA
Construction
Primary TypeDisplay / CRT
EnvelopeGlass
Base MaterialPlastic
SectionsSingle
Filament / Heater
Heater NotesIndirectly heated
Absolute Maximum Ratings
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Television Monitoring | 14000 V | — | — | — | — |
Application Notes
The external conductive coating may be used for E.H.T. smoothing. The grid should never be positive with respect to the cathode except immediately after switching off.
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