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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

U50

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BrandMarconi
ClassRectifier
BaseOctal

Construction

Primary TypeDirectly heated
Rectifier TypeBi-phase half-wave
EnvelopeDome top
Sections2

Filament / Heater

Absolute Maximum Ratings

Plate Voltage350 V
Cathode Current120 mA

Audio Performance

Key Features
  • Directly heated
  • Bi-phase half wave capacitor input

Application Notes

Mounting in any position.

Filters

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