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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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25CA5 vacuum tube outline illustration

Tube-number record

25CA5

0 archive entries

25CA5 is a tube type in the TubeDatabase archive (class: PENTODE). Recorded specifications: brand TUNG-SOL, year 1955, construction Beam tetrode / beam power, socket Miniature 7-pin (B7G), maximum plate voltage 130 V, and maximum plate dissipation 5 W. The archive does not yet hold a photographed example of this type.

BrandTUNG-SOL
ClassPENTODE
BaseMiniature 7-pin (B7G)
Filament25 V @ 0.3 mA

Construction

Primary TypeBeam tetrode / beam power
EnvelopeGlass Bulb
Sections1

Filament / Heater

Heater NotesAC OR DC

Absolute Maximum Ratings

Plate Voltage130 V

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Class A1 Amplifier110 V810016000—42 mA
Class A1 Amplifier125 V920015000—37 mA

Application Notes

Designed primarily for use in the audio frequency power output stage of television and radio receivers.

Filters

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Manufacturers

Brands

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    Plate Dissipation5 W
    Grid 2 Voltage130 V
    H-C Voltage200 V

    Audio Performance

    Typical THD6%
    Power Output1.5 W
    Key Features
    • Miniature Construction
    • Coated Unipotential Cathode
    • High Power Sensitivity
    • Low Plate and Screen Voltages