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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

11D12

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11D12 is a tube type in the TubeDatabase archive (class: Low-mu Power Double Triode). Recorded specifications: brand EDISWAN, construction Dual triode, socket Special / none, maximum plate voltage 250 V, and maximum plate dissipation 13 W. The archive does not yet hold a photographed example of this type.

BrandEDISWAN
ClassLow-mu Power Double Triode
BaseSpecial / none
Filament6.3 V @ 2.5 mA

Construction

Primary TypeDual triode
EnvelopeGlass
Sections2

Filament / Heater

Absolute Maximum Ratings

Plate Voltage250 V
Plate Dissipation13 W

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Each Section135 V70002802125 mA

Application Notes

With fixed bias, the anode circuit should contain a protective resistance to provide a minimum drop of 15V DC. For parallel sections at high dissipation, separate anode and cathode resistors are required.

Datasheets

Datasheet: 11D12.pdf

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

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Manufacturers

Brands

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    Grid 1 Voltage
    -2300 V
    Cathode Current125 mA
    H-C Voltage300 V

    Audio Performance

    Key Features
    • Separate cathodes
    • Suitable for booster scanning circuits
    • Suitable for series regulator in DC power supplies