7BFP
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BrandDu Mont
ClassCathode-Ray Tube
BaseB25-139
Filament6.3V @ 1800mA
Construction
Primary TypeCathode-Ray Tube
Envelope4 x 6-Inch rectangular glass
SectionsThree-beam
Filament / Heater
Heater NotesCommon heater connections for all three beams
Absolute Maximum Ratings
Plate Voltage4000 V
Plate Dissipation6 W
Grid 2 Voltage12000 V
Grid 1 Voltage-300 V
H-C Voltage180 V
Audio Performance
Key Features
- Three-beam independently controllable
- Electrostatic focus
- Electrostatic deflection
- Linear post accelerator
- Metal-backed screen
- Separately scannable screen areas
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Standard Three-Beam Operation | 3000V | - | - | - | 0.015mA |
Application Notes
Designed for three simultaneous displays with high deflection sensitivity and brightness. Optimum Eb3/Eb2 ratio is 3.0.
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