Tube-number record
C21NM
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C21NM is a tube type in the TubeDatabase archive (class: Teletube). Recorded specifications: brand BRIMAR, construction Pentode, base Glass, socket Duodecal, and maximum plate voltage 18000 V. The archive does not yet hold a photographed example of this type.
BrandBRIMAR
ClassTeletube
BaseDuodecal
Filament6.3 V @ 300 mA
Construction
Primary TypePentode
EnvelopeRectangular 70° deflection
Base MaterialGlass
SectionsSingle
Filament / Heater
Heater NotesIndirectly heated
Absolute Maximum Ratings
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical Operation | 16000 V | — | — | — | — |
Application Notes
No harmful X-ray radiation is produced below 16 kV. Above 16 kV, shielding may be necessary. The ion-trap magnet should be adjusted to give the brightest picture.
Datasheets
Datasheet: C21NM.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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