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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

B-6

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BrandGeneral Electric
ClassBallast Tube
BaseSpecial / none
Filament15 V @ 950 mA

Construction

Primary TypeOther / special
EnvelopeGlass
Sections1

Filament / Heater

Heater NotesCurrent variation within operating voltage range

Absolute Maximum Ratings

Plate Voltage21 V

Audio Performance

Key Features
  • Constant-current device
  • Hydrogen-filled envelope
  • Temperature-dependent resistor

Application Notes

The ballast tube should be mounted, with the base down. Envelope becomes quite hot during operation; free circulation of air must be allowed to keep temperature below 150 F.

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