Tube-number record
A 49-220 X
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BrandMAZDA BELVU
ClassColor Television Picture Tube
BaseCRT base (B12 family)
Filament6.3 V @ 900 mA
Construction
Primary TypeShadow-Mask (masque perforé)
EnvelopeGlass, 90° deflection
SectionsTriple (3 electron guns)
Filament / Heater
Heater NotesFilaments connected in series
Absolute Maximum Ratings
Plate Voltage27500 V
Grid 2 Voltage1000 V
Grid 1 Voltage-400 V
Cathode Current0.75 mA
H-C Voltage200 V
Audio Performance
Key Features
- Perma-Chrome thermal compensation
- Aluminized screen
- P22 High efficiency phosphors
- Integral protection
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Example | 25000 V | — | — | — | — |
Application Notes
Recommended heater voltage regulation at 6.3V for maximum cathode life. Horizontal mounting position recommended.
Datasheets
Datasheet: A49-220X.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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