Tube-number record
21ELP4
0 archive entries
21ELP4 is a tube type in the TubeDatabase archive (class: Television Picture Tube). Recorded specifications: brand Westinghouse, year 1958, construction Display / CRT, socket Duodecal, and maximum plate voltage 20000 V. The archive does not yet hold a photographed example of this type.
BrandWestinghouse
ClassTelevision Picture Tube
BaseDuodecal
Filament6.3 V @ 300 mA
Construction
Primary TypeDisplay / CRT
EnvelopeRectangular Glass
Sections1
Filament / Heater
Absolute Maximum Ratings
Plate Voltage20000 V
Grid 2 Voltage500 V
Grid 1 Voltage-140 V
H-C Voltage180 V
Audio Performance
Key Features
- Aluminized Screen
- Gray Filter Glass
- No Ion Trap Gun
- External Conductive Coating
- 90° Magnetic Deflection
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Grid Drive Service | 14000 V | — | — | — | — |
| Grid Drive Service | 16000 V | — | — | — | — |
Application Notes
Recommended for use in television receivers. Grid 2 should be operated at a voltage greater than 300V for optimal resolution. Shielding for X-ray radiation may be required for operations above 16kV.
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