Tube-number record
A47-18W
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BrandMullard
ClassTelevision Tube
BaseDuodecal
Filament6.3 V @ 300 mA
Construction
Primary TypeDisplay / CRT
EnvelopeReinforced Glass
SectionsSingle
Filament / Heater
Heater NotesSuitable for series or parallel operation. Surge voltage must not exceed 9.5 Vrms.
Absolute Maximum Ratings
Plate Voltage18000 V
Grid 2 Voltage700 V
Grid 1 Voltage-150 V
H-C Voltage250 V
Audio Performance
Key Features
- Metal backed screen
- Reinforced envelope
- Safety screen not required
- Direct viewing
- External conductive coating
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Visual extinction (Va1=400V) | 18000 V | — | — | — | 0.1 mA |
| Visual extinction (Va1=500V) | 18000 V | — | — | — | 0.1 mA |
Application Notes
The tube is electrically identical to the AW47-91. External conductive coating M must be earthed. Metal band B must be connected to chassis via a 2 MOhm resistor.
Datasheets
Datasheet: A47-18W.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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