Tube-number record
7BMP
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BrandElectronic Tube Corp.
ClassCathode Ray Tube
BaseCRT base (B12 family)
Filament6.3 V @ 0.6 mA
Construction
Primary TypeElectrostatic deflection and focus
Envelope7-inch rectangular
Base MaterialDiheptal
SectionsSingle gun
Filament / Heater
Heater Notes± 10%
Absolute Maximum Ratings
Plate Voltage8000 V
Grid 1 Voltage-200 V
H-C Voltage180 V
Audio Performance
Key Features
- 7-inch rectangular face
- Post-accelerator
- High brightness
- Small spot size
- Minimum edge defocusing
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical | 5000 V | — | — | — | — |
Application Notes
The tube can be severely and permanently damaged if current density on the P19 screen is allowed to raise too high in static tests.
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