Tube-number record
A47-25W
0 archive entries
A47-25W is a tube type in the TubeDatabase archive (class: Television Picture Tube). Recorded specifications: brand Brimar, construction Display / CRT, base Glass, socket CRT base (B8H), and maximum plate voltage 20000 V. The archive does not yet hold a photographed example of this type.
BrandBrimar
ClassTelevision Picture Tube
BaseCRT base (B8H)
Filament6.3 V @ 300 mA
Construction
Primary TypeDisplay / CRT
EnvelopeRectangular Reinforced Envelope
Base MaterialGlass
Sections1
Filament / Heater
Heater NotesSeries heater chain connection recommended at chassis end
Absolute Maximum Ratings
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Grid Modulation | 18000 V | — | — | — | 0.35 mA |
| Cathode Modulation | 18000 V | — | — | — | 0.35 mA |
Application Notes
X-ray radiation shielding may be necessary if operated above 16 kV. The metal shell M2 must be connected to chassis via a 2 Megohm resistor.
Datasheets
Datasheet: A47-25W.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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