Tube-number record
A47-14W
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BrandMullard
ClassTelevision Cathode Ray Tube
BaseCRT base (B8H)
Filament6.3 V @ 300 mA
Construction
Primary TypeDisplay / CRT
EnvelopeRectangular glass
Base MaterialGlass
SectionsSingle gun
Filament / Heater
Heater NotesSuitable for series or parallel operation; surge heater voltage must not exceed 9.5V r.m.s.
Absolute Maximum Ratings
Plate Voltage20000 V
Grid 2 Voltage700 V
Grid 1 Voltage-400 V
H-C Voltage250 V
Audio Performance
Key Features
- Metal backed screen
- Direct viewing
- Double magnetic deflection
- External conductive coating
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical Operation - Grid Modulation | 20000 V | — | — | — | 0.25 mA |
| Typical Operation - Cathode Modulation | 20000 V | — | — | — | 0.25 mA |
Application Notes
X-ray shielding is advisable if operated above 20kV. The d.c. value of bias must not allow grid to become positive with respect to cathode except during switch on/off. Pin protector should remain until socket installation.
Datasheets
Datasheet: A47-14W.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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