Tube-number record
21ERPA
0 archive entries
21ERPA is a tube type in the TubeDatabase archive (class: Television Picture Tube). Recorded specifications: brand Sylvania, year 1958, construction Rectangular Glass, socket CRT base (B7 family), and maximum plate voltage 20000 V. The archive does not yet hold a photographed example of this type.
BrandSylvania
ClassTelevision Picture Tube
BaseCRT base (B7 family)
Filament6.3 V @ 600 mA
Construction
Primary TypeRectangular Glass
EnvelopeJ171H or J171I
Sections1
Filament / Heater
Heater NotesHeater warm-up time: 11 seconds
Absolute Maximum Ratings
Plate Voltage20000 V
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 at higher than the manufacturer's Maximum Rated Anode Voltage or 16,000 volts, whichever is less. Integral safety plate laminated directly to face of tube.
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