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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

UA1A

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BrandTesla
ClassMercury-vapour Rectifier
BaseScrew / Edison base

Construction

Primary TypeDiode
Rectifier TypeHalf-wave
EnvelopeHard glass
Sections1

Filament / Heater

MaterialOxide-coated
Warm-up Time600s

Absolute Maximum Ratings

Plate Voltage9000 V
Cathode Current1000 mA

Audio Performance

Key Features
  • Mercury-vapour filled
  • Directly heated oxide-coated cathode
  • Carburized nickel anode
  • Hard glass envelope

Application Notes

Suitable for HV rectifiers for powering transmitters. Delivers up to 1 A rectified current when suitably connected.

Datasheets

Datasheet: UA1A.pdf

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

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