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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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XCH 81/3AJ8 vacuum tube outline illustration

Tube-number record

XCH 81/3AJ8

0 archive entries

XCH 81/3AJ8 is a tube type in the TubeDatabase archive (class: Triode-Heptode). Recorded specifications: brand IBRAPE (Miniwatt), construction Multi-section, socket Noval (B9A), maximum plate voltage 300 V, and maximum plate dissipation 1.7 W. The archive does not yet hold a photographed example of this type.

BrandIBRAPE (Miniwatt)
ClassTriode-Heptode
BaseNoval (B9A)
Filament3.6 V @ — mA

Construction

Primary TypeMulti-section
EnvelopeGlass
Sections2

Filament / Heater

Warm-up Time11s
Heater NotesIndireto, alimentacao em série (A.C. ou D.C.)

Absolute Maximum Ratings

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Heptode Misturadora250 V7501000000—3.25 mA
Heptode Amplificadora RF/FI250 V2400700000—0.5 mA
Triode Caracteristicas Tipicas100 V3700—2213.5 mA

Application Notes

A secao heptodo pode ser usada sem precaucoes especiais contra efeitos microfonicos em circuitos onde Vi=50mV para saida de 50mW.

Filters

0 tubes found

Manufacturers

Brands

    0 results
    Plate Voltage300 V
    Plate Dissipation1.7 W
    Grid 2 Voltage125 V
    Grid 1 Voltage-1.3 V
    Cathode Current12.5 mA
    H-C Voltage150 V

    Audio Performance

    Power Output0.05 W
    Key Features
    • Misturadora
    • Amplificadora RF/FI
    • Triodo-Heptodo
    Triode Osciladora250 V650——4.5 mA