Tube-number record
21AFP4
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BrandSYLVANIA
ClassTelevision Picture Tube
BaseDuodecal
Filament6.3 V @ 600 mA
Construction
Primary TypeDisplay / CRT
EnvelopeGlass
SectionsSingle
Filament / Heater
Heater NotesIndirectly heated
Absolute Maximum Ratings
Plate Voltage18000 V
Grid 2 Voltage500 V
Grid 1 Voltage-125 V
H-C Voltage180 V
Audio Performance
Key Features
- Direct Viewed
- Rectangular Glass Type
- Spherical Faceplate
- Gray Filter Glass
- Single Field Ion Trap
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Recommended Operating Conditions | 16000 V | — | — | — | — |
Application Notes
X-ray radiation shielding may be necessary if operated higher than maximum rated anode voltage.
Datasheets
Datasheet: 21AFP4.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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