Tube-number record
21AXP22, 21AXP22A
0 archive entries
21AXP22, 21AXP22A is a tube type in the TubeDatabase archive (class: Color Television Picture Tube). Recorded specifications: brand Sylvania, construction Other / special, socket CRT base (B12 family), and maximum plate voltage 27500 V. The archive does not yet hold a photographed example of this type.
BrandSylvania
ClassColor Television Picture Tube
BaseCRT base (B12 family)
Filament6.3 V @ 1.8 mA
Construction
Primary TypeOther / special
EnvelopeRound Metal Shell
Sections3
Filament / Heater
Heater NotesHeater current tolerance is +/- 10%
Absolute Maximum Ratings
Plate Voltage27500 V
Grid 2 Voltage880 V
Grid 1 Voltage-440 V
Cathode Current0.5 mA
H-C Voltage200 V
Audio Performance
Key Features
- Electrostatic Focus
- Magnetic Convergence
- Magnetic Deflection
- Aluminized Tri-color Phosphor-dot screen
- Spherical Faceplate
- Filter Glass
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Equipment Design Range (at 25kV Anode) | 25000 V | — | — | — | — |
Application Notes
The 21AXP22A features an internal neck coating having high resistance which eliminates the need for an external protection resistor against momentary internal arcs.
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