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

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Tube-number record

EY84

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BrandMullard
ClassHalf-wave rectifier
BaseNoval (B9A)
Filament6.3 V @ 1000 mA

Construction

Primary TypeIndirectly heated
Rectifier TypeHalf-wave
EnvelopeGlass
Base MaterialGlass
SectionsSingle

Filament / Heater

Heater NotesIndirectly heated

Absolute Maximum Ratings

Plate Voltage2000 V
Cathode Current900 mA
H-C Voltage650 V

Audio Performance

Key Features
  • Primarily intended for operation at high altitudes
  • Indirectly heated

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Capacitor Input500 V—150—150 mA
Capacitor Input625 V—250—125 mA
Choke Input700 V———175 mA

Application Notes

For 1,600 c/s operation the same I/V relation would be obtained using a capacitor of 0.5 uF.

Datasheets

Datasheet: EY84.pdf

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

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    Full-wave (Two Valves) Capacitor Input500 V—150—300 mA