Tube-number record
31-120 W
0 archive entries
31-120 W is a tube type in the TubeDatabase archive (class: Black and White Picture Tube). Recorded specifications: brand ITT Components Group Europe and construction Other / special. The archive does not yet hold a photographed example of this type.
BrandITT Components Group Europe
ClassBlack and White Picture Tube
Construction
Primary TypeOther / special
EnvelopeGlass
Filament / Heater
Heater NotesIndirectly heated; both alternating current and direct current may be used, with parallel or series connection.
Absolute Maximum Ratings
Audio Performance
Key Features
- SELBOND® implosion protection
- Aluminium coating
- External graphite coating
- Oxide-coated cathode
Application Notes
The undeflected spot disappears by making the control grid voltage approximately 5V more negative than the raster cutoff voltage.
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