Tube-number record
21EQP4
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BrandSylvania
ClassTelevision Picture Tube
BaseCRT base (B7 family)
Filament6.3 V @ 0.6 mA
Construction
Primary TypeDisplay / CRT
EnvelopeJ17LH or J17 Glass
Base MaterialPlastic
Sections1
Filament / Heater
Heater NotesWarm-up time approx. 11 seconds
Absolute Maximum Ratings
Plate Voltage20000 V
Grid 2 Voltage700 V
Grid 1 Voltage-154 V
H-C Voltage200 V
Audio Performance
Key Features
- Direct Viewed
- Rectangular Glass Type
- Spherical Faceplate
- Aluminized Screen
- No Ion Trap
- Short Neck
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Grid Drive Service | 16000 V | — | — | — | — |
Application Notes
X-ray radiation shielding may be necessary if operated higher than 16,000 volts. External conductive coating must be grounded.
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