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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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12DM7 vacuum tube outline illustration

Tube-number record

12DM7

0 archive entries

12DM7 is a tube type in the TubeDatabase archive (class: Duotriode). Recorded specifications: brand Tung-Sol, year 1960, construction Duotriode, base Miniature 9-Pin, socket Noval (B9A), maximum plate voltage 340 V, and maximum plate dissipation 1.1 W. The archive does not yet hold a photographed example of this type.

BrandTung-Sol
ClassDuotriode
BaseNoval (B9A)
Filament12.6 V @ 0.13 mA

Construction

Primary TypeDuotriode
EnvelopeGlass
Base MaterialMiniature 9-Pin
Sections2

Filament / Heater

Heater NotesSeries or Parallel operation; AC or DC

Absolute Maximum Ratings

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Class A Amplifier100 V1250800001000.5 mA
Class A Amplifier250 V1600625001001.2 mA

Application Notes

The 12DM7 is particularly adapted for application in low level stages of high-fidelity amplifiers and other audio equipment.

Filters

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Manufacturers

Brands

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    Plate Voltage340 V
    Plate Dissipation1.1 W
    Grid 1 Voltage-50 V
    H-C Voltage180 V

    Audio Performance

    Key Features
    • Low-hum
    • High-mu
    • 9-pin miniature construction