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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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25C5 vacuum tube outline illustration

Tube-number record

25C5

0 archive entries

25C5 is a tube type in the TubeDatabase archive (class: Beam Pentode). Recorded specifications: brand TUNG-SOL, year 1961, construction Beam tetrode / beam power, socket Miniature 7-pin (B7G), maximum plate voltage 150 V, and maximum plate dissipation 7 W. The archive does not yet hold a photographed example of this type.

BrandTUNG-SOL
ClassBeam Pentode
BaseMiniature 7-pin (B7G)
Filament25 V @ 300 mA

Construction

Primary TypeBeam tetrode / beam power
EnvelopeT-5 1/2
Sections1

Filament / Heater

Heater NotesAC OR DC, SERIES STRING

Absolute Maximum Ratings

Plate Voltage150 V

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
CLASS A1 AMPLIFIER120 V750010000—49 mA

Application Notes

DESIGNED FOR USE AS A POWER AMPLIFIER IN THE OUTPUT STAGE OF AC-DC RECEIVERS. EXCEPT FOR HEATER RATINGS THE 25C5 IS IDENTICAL TO THE 50C5.

Filters

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Manufacturers

Brands

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    Plate Dissipation7 W
    Grid 2 Voltage130 V
    H-C Voltage200 V

    Audio Performance

    Typical THD10%
    Power Output2.3 W
    Key Features
    • COATED UNIPOTENTIAL CATHODE
    • MINIATURE
    • ANY MOUNTING POSITION