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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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849-A vacuum tube outline illustration

Tube-number record

849-A

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849-A is a tube type in the TubeDatabase archive (class: Transmitting Tube). Recorded specifications: brand Amperex, construction Triode, socket 3-pin / Peewee, maximum plate voltage 4000 V, and maximum plate dissipation 500 W. The archive does not yet hold a photographed example of this type.

BrandAmperex
ClassTransmitting Tube
Base3-pin / Peewee

Construction

Primary TypeTriode
EnvelopeGlass
SectionsSingle

Filament / Heater

MaterialThoriated Tungsten

Absolute Maximum Ratings

Plate Voltage4000 V

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
A.F. Power Amplifier Class A2500 V7600—19135 mA
A.F. Power Amplifier Class A3000 V7600—19120 mA
A.F. Power Amplifier Class A4000 V7600—19

Application Notes

The Amperex 849-A is designed for A.F. Power Amplifier, Modulator, R.F. Power Amplifier or Oscillator service.

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    Plate Dissipation500 W
    Grid 1 Voltage-500 V
    Cathode Current500 mA

    Audio Performance

    Typical THD4%
    Power Output150 W
    Key Features
    • Radiation cooled
    • Thoriated tungsten filament
    • Supersedes older 849 model
    100 mA
    R.F. Power Amplifier Class C Telegraphy3000 V———500 mA