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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

SPECTRAL LIGHT SOURCE

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BrandFerranti
ClassGas Discharge Tube
BaseMiniature 7-pin (B7G)
Filament6.3 V @ 1500 mA

Construction

Primary TypeOther / special
EnvelopeGlass
Base MaterialStandard
SectionsSingle

Filament / Heater

Heater NotesMin. cathode heating delay: 6 sec

Absolute Maximum Ratings

Plate Voltage500 V
Cathode Current90 mA

Audio Performance

Key Features
  • Spectrally pure gas filling
  • Compact source
  • Output proportional to anode current

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