Tube-number record
21DKP4
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BrandSylvania
ClassTelevision Picture Tube
BaseCRT base (B7 family)
Filament6.3 V @ 300 mA
Construction
Primary TypeDisplay / CRT
EnvelopeRectangular Glass
Base MaterialPlastic
Sections1
Filament / Heater
Warm-up Time11s
Heater Notes300 mA heater current
Absolute Maximum Ratings
Plate Voltage19800 V
Grid 2 Voltage550 V
Grid 1 Voltage-154 V
H-C Voltage200 V
Audio Performance
Key Features
- Electrostatic Focusing
- Magnetic Deflection
- Aluminized Screen
- Gray Filter Glass
- No Ion Trap
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Standard Operation | 16000 V | — | — | — | — |
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