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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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7217 vacuum tube outline illustration

Tube-number record

7217

0 archive entries

7217 is a tube type in the TubeDatabase archive (class: Mercury Vapour Rectifier). Recorded specifications: brand Marconi Italiana, construction Diode, base Metal-Shell, socket 5-pin, and maximum plate voltage 20000 V. The archive does not yet hold a photographed example of this type.

BrandMarconi Italiana
ClassMercury Vapour Rectifier
Base5-pin

Construction

Primary TypeDiode
Rectifier Typehalf-wave
EnvelopeGlass
Base MaterialMetal-Shell
Sections1

Filament / Heater

MaterialCoated

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Half-Wave Rectifier14200 V———1750 mA

Application Notes

The 7217 is a half-wave mercury vapour diode, suitable for use as a high voltage rectifier for peak inverse voltages up to 20000 volts.

Datasheets

Datasheet: 7217.pdf

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

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    Warm-up Time
    60s

    Absolute Maximum Ratings

    Plate Voltage20000 V
    Cathode Current1750 mA

    Audio Performance

    Key Features
    • Half-wave mercury vapour diode
    • High voltage rectifier
    • Peak inverse voltages up to 20000V