Tube-number record
7BP7-B
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BrandGeneral Electric
ClassCathode-Ray Tube
BaseOctal
Filament6.3 V @ 600 mA
Construction
Primary TypeDisplay / CRT
EnvelopeGlass
Base MaterialLong Medium-shell Octal 8-Pin
SectionsSingle
Filament / Heater
Heater NotesAC or DC
Absolute Maximum Ratings
Plate Voltage8000 V
Grid 2 Voltage700 V
Grid 1 Voltage-180 V
H-C Voltage180 V
Audio Performance
Key Features
- High-resolution electron gun
- Small spot size
- Improved spot shape
- Long persistence
- Depth of focus
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Standard Operation | 7000 V | — | — | — | 0.2 mA |
Application Notes
The 7BP7-B is a direct-view glass cathode-ray tube for oscilloscope and radar applications requiring long persistence. Anode voltage should not be less than 4000 volts for adequate brightness.
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