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

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Tube-number record

U.201

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BrandMazda
ClassRectifier
BaseOctal
Filament20 V @ 200 mA

Construction

Primary TypeRectifier
Rectifier TypeIndirectly heated
EnvelopeClear Bulb
SectionsSingle

Filament / Heater

Heater NotesIndirectly heated

Absolute Maximum Ratings

Plate Voltage250 V
Cathode Current90 mA

Audio Performance

Key Features
  • AC/DC mains operation
  • Clear bulb

Application Notes

To safeguard the valve from large current surges, the maximum capacity of the smoothing condenser when no resistance is included is 8uF. When reservoir capacity is 16uF, a resistance of 50 ohms should be used in series. At 110V operation, up to 32uF may be used without series resistance.

Datasheets

Datasheet: U201.pdf

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Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.

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