21ZP4-A
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BrandGeneral Electric
ClassCathode-Ray Tube
BaseSmall-shell Duodecal 5-Pin
Filament6.3V @ 600mA
Construction
Primary TypeGlass, Rectangular
EnvelopeJ170-B1
Base MaterialSmall-shell Duodecal 5-Pin, JETEC No. B5-57
Sections1
Filament / Heater
Heater NotesAC or DC
Absolute Maximum Ratings
Plate Voltage18000 V
Grid 2 Voltage500 V
Grid 1 Voltage-125 V
H-C Voltage180 V
Audio Performance
Key Features
- Magnetic Focus
- Magnetic Deflection
- Ion-trap gun
- External conductive coating
- Gray faceplate
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Magnetic Focus | 16000V | - | - | - | - |
Application Notes
The electron gun is designed for use with an external single-field ion-trap magnet. Gray faceplate increases picture contrast.
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