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Tube Database (7,341 tube types · 1,270 archive entries)

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Tube-number record

7BP-

0 archive entries

7BP- is a tube type in the TubeDatabase archive (class: Cathode-Ray Tube). Recorded specifications: construction Magnetic focus and deflection, base Medium-Shell Octal 8-Pin (B8-65), socket Octal, maximum plate voltage 8000 V, and maximum plate dissipation 6 W. The archive does not yet hold a photographed example of this type.

ClassCathode-Ray Tube
BaseOctal
Filament6.3 V @ 0.6 mA

Construction

Primary TypeMagnetic focus and deflection
EnvelopeGlass, 7-inch
Base MaterialMedium-Shell Octal 8-Pin (B8-65)
SectionsSingle

Filament / Heater

Heater NotesCurrent tolerance +/- 10%

Absolute Maximum Ratings

Plate Voltage8000 V
Plate Dissipation6 W
Grid 2 Voltage700 V
Grid 1 Voltage-125 V
H-C Voltage125 V

Audio Performance

Key Features
  • Magnetic focusing
  • Magnetic deflection
  • Long persistence screen
  • Flat screen area

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Typical Operating Conditions 14000 V———0.2 mA
Typical Operating Conditions 27000 V————

Application Notes

Primarily designed for radar indicator applications. At or near maximum anode ratings, the effective resistance of the anode supply should limit input power to 6 watts.

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