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

Other (3,151 tube types), Pre (2,370 tube types), Power (1,057 tube types), Rectifier (763 tube types)
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Tube-number record

7BP7-A

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BrandRCA
ClassOscillograph Tube
BaseOctal
Filament6.3 V @ 600 mA

Construction

Primary TypeDisplay / CRT
EnvelopeGlass
Base MaterialLong Medium-Shell Octal
Sections1

Filament / Heater

Heater NotesUnipotential Cathode

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 Focus
  • Magnetic Deflection
  • P7 Phosphor
  • Blue Fluorescence
  • Greenish-Yellow Phosphorescence

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Operation 14000 V————
Operation 27000 V————

Application Notes

Brilliance and definition decrease with decreasing anode voltage; generally, anode voltage should not be less than 4000V. Effective resistance of anode supply should limit input power to 6W.

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