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

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Tube-number record

6/33AM

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BrandFerranti
ClassFlying Spot Scanner Tube
BaseDuodecal
Filament6.3 V @ 300 mA

Construction

Primary TypeTriode
EnvelopeGlass
Sections1

Filament / Heater

Heater NotesIndirectly heated

Absolute Maximum Ratings

Plate Voltage25000 V
Cathode Current0.2 mA
H-C Voltage100 V

Audio Performance

Key Features
  • Metal backed screen
  • Magnetic focus
  • Electrostatic deflection
  • Green fluorescence
  • Ultra-short persistence

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Standard20000 V———0.15 mA

Application Notes

The grid should never be positive with respect to the cathode. Shielding may be required to protect against X-ray radiation when operated at high anode voltages.

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