21FAP4
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BrandSylvania
ClassTelevision Picture Tube
BaseCRT base (B7 family)
Filament6.3V @ 600mA
Construction
Primary TypeDisplay / CRT
EnvelopeJ171G or J171K
SectionsSingle
Filament / Heater
Heater NotesHeater warm-up time is 11 seconds.
Absolute Maximum Ratings
Plate Voltage22000 V
Grid 2 Voltage600 V
Grid 1 Voltage-154 V
H-C Voltage200 V
Audio Performance
Key Features
- 21” Direct Viewed Rectangular Glass Type
- Spherical Faceplate
- Gray Filter Glass
- Aluminized Screen
- No Ion Trap
- External Conductive Coating
- Short Neck
- Lightweight Tube
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Grid Drive Service | 16000V | - | - | - | - |
Application Notes
X-ray radiation shielding may be necessary if operated at higher than Maximum Rated Anode Voltage.
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