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

Other (3,257 tube types), Pre (2,314 tube types), Power (1,030 tube types), Rectifier (740 tube types)
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Tube-number record

5/21 AM

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BrandFerranti
ClassCathode Ray Tube
BaseDuodecal
Filament6.3 V @ 300 mA

Construction

Primary TypeTriode
EnvelopeGlass
Base MaterialPlastic
Sections1

Filament / Heater

Absolute Maximum Ratings

Plate Voltage25000 V
H-C Voltage200 V

Audio Performance

Key Features
  • High resolution
  • Optically flat face
  • Metal-backed screen
  • Triode gun

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Standard20000 V————

Application Notes

X-ray shielding may be required if anode voltage exceeds 16kV. Screen resolution measured at center by shrinking raster method.

Filters

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Manufacturers

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