Tube-number record
7BSP-
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7BSP- is a tube type in the TubeDatabase archive (class: Cathode-Ray Tube). Recorded specifications: brand Allen B. Du Mont Laboratories, construction Electrostatic Focus and Deflection, socket CRT / special base, maximum plate voltage 8800 V, and maximum plate dissipation 6 W. The archive does not yet hold a photographed example of this type.
BrandAllen B. Du Mont Laboratories
ClassCathode-Ray Tube
BaseCRT / special base
Filament6.3 V @ 2800 mA
Construction
Primary TypeElectrostatic Focus and Deflection
EnvelopeGlass, 7-Inch diameter flat face
Sections5 Independent Beams
Filament / Heater
Heater NotesCurrent for all units combined
Absolute Maximum Ratings
Plate Voltage8800 V
Plate Dissipation6 W
Grid 2 Voltage4400 V
Grid 1 Voltage-200 V
H-C Voltage180 V
Audio Performance
Key Features
- 7-Inch diameter flat face
- Five Independent beams
- Linear post accelerator
- Minimize lead inductance and capacity bulb wall connections
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical Operating Conditions | 6000 V | — | 165000000 | — | 0.018 mA |
Application Notes
Tube is designed for optimum performance at Eb3/Eb2 ratio of 2.0. Collar base provides ease of connection to deflection leads.
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