A47-18W
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BrandMullard
ClassTelevision Tube
BaseB12A
Filament6.3V @ 300mA
Construction
Primary TypeCRT
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) | 18000V | - | - | - | 0.1mA |
| Visual extinction (Va1=500V) | 18000V | - | - | - | 0.1mA |
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.
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