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

Pre (2,630 tube types), Other (2,603 tube types), Power (1,292 tube types), Rectifier (816 tube types)
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U18 vacuum tube outline illustration

Tube-number record

U18

0 archive entries

U18 is a tube type in the TubeDatabase archive (class: Full Wave Rectifier). Recorded specifications: brand Marconi, construction Directly heated, and maximum plate voltage 500 V. The archive does not yet hold a photographed example of this type.

BrandMarconi
ClassFull Wave Rectifier

Construction

Primary TypeDirectly heated
SectionsFull Wave

Filament / Heater

Absolute Maximum Ratings

Plate Voltage500 V
Cathode Current250 mA

Audio Performance

Key Features
  • Sturdy construction

Filters

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