Tube-number record
7BKP
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7BKP is a tube type in the TubeDatabase archive (class: Industrial and Military Cathode Ray Tube). Recorded specifications: brand General Electric, construction Electrostatic Focus and Deflection, socket CRT base (B12 family), maximum plate voltage 4000 V, and maximum plate dissipation 6 W. The archive does not yet hold a photographed example of this type.
BrandGeneral Electric
ClassIndustrial and Military Cathode Ray Tube
BaseCRT base (B12 family)
Filament6.3 V @ 600 mA
Construction
Primary TypeElectrostatic Focus and Deflection
EnvelopeGlass 5 1/2 x 5 1/2 inch square
Sections1
Filament / Heater
Heater NotesHeater current tolerance is +/- 10%
Absolute Maximum Ratings
Plate Voltage4000 V
Plate Dissipation6 W
Grid 1 Voltage-200 V
H-C Voltage180 V
Audio Performance
Key Features
- Low pattern distortion
- High deflection sensitivity
- High brightness
- Aluminized
- Electrostatic focus
- Electrostatic deflection
- Spherical clear faceplate
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical Operating Conditions | 2500 V | — | — | — | — |
Application Notes
The phosphor screen may be damaged if the exciting current density is greater than 1.4 microamperes per square centimeter for P25, and if greater than .06 microamperes per square centimeter for P19.
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