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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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ESU111 vacuum tube outline illustration

Tube-number record

ESU111

0 archive entries

ESU111 is a tube type in the TubeDatabase archive (class: Half-Wave Mercury Vapour Rectifier). Recorded specifications: brand Ediswan, construction Mercury Vapour, base A3-20, socket 3-pin / Peewee, and maximum plate voltage 20000 V. The archive does not yet hold a photographed example of this type.

BrandEdiswan
ClassHalf-Wave Mercury Vapour Rectifier
Base3-pin / Peewee
Filament5 V @ 12000 mA

Construction

Primary TypeMercury Vapour
Rectifier TypeHalf-Wave
EnvelopeGlass
Base MaterialA3-20
SectionsSingle

Filament / Heater

MaterialIndirectly Heated

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Full wave (2 valves)6300 V———6000 mA

Application Notes

The cathode of this rectifier should be allowed an adequate heating time, preferably longer than the specified absolute minimum of 3 minutes. Initial cathode heating time of 30 minutes should be allowed after storage or transportation.

Datasheets

Datasheet: ESU111.pdf

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

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    Warm-up Time
    180s
    Heater NotesIndirectly heated cathode

    Absolute Maximum Ratings

    Plate Voltage20000 V
    Cathode Current3000 mA

    Audio Performance

    Key Features
    • Indirectly heated
    • Mercury vapour
    • High voltage output
    • Cathode heating delay