Tube-number record
A56-120X
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ClassColour Television Picture Tube
BaseCRT base (B12 family)
Filament6.3 V @ 900 mA
Construction
Primary TypeDisplay / CRT
EnvelopeReinforced glass
SectionsTriple-gun
Filament / Heater
Heater NotesRegulated supply recommended for maximum cathode life.
Absolute Maximum Ratings
Plate Voltage27500 V
Grid 2 Voltage400 V
Cathode Current1 mA
H-C Voltage250 V
Audio Performance
Key Features
- Advanced red phosphor, europium activated
- Unity current ratio
- Temperature compensated shadow-mask
- Reinforced tube envelope - separate safety screen not required
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Standard | 25000 V | — | — | — | 0.8 mA |
Application Notes
Magnetic shielding must be provided to minimize extraneous magnetic fields; shielding should be 0.5mm minimum thickness cold-rolled mild steel.
Datasheets
Datasheet: A56-120X.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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