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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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Tube-number record

HR3

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BrandFerranti
ClassHigh Voltage Rectifier
BaseMiniature 7-pin (B7G)
Filament4 V @ 500 mA

Construction

Primary TypeIndirectly heated
Rectifier TypeHalf-Wave
EnvelopeMiniature Glass
SectionsSingle

Filament / Heater

Absolute Maximum Ratings

Plate Voltage5000 V
Cathode Current15 mA

Audio Performance

Key Features
  • Miniature
  • Indirectly heated
  • Half-Wave High Voltage Rectifier
  • Any mounting position

Application Notes

May be used with simultaneous switching providing the R.M.S. input voltage is not more than 3.5 kV. and the rectified current does not exceed 3.0 mA.

Filters

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