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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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Tube-number record

PENTODE POWER AMPLIFIER OSCILLATOR

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PENTODE POWER AMPLIFIER OSCILLATOR is a tube type in the TubeDatabase archive (class: Power Pentode). Recorded specifications: brand TUNG-SOL, year 1945, construction Pentode, base Micanol, socket 5-pin, maximum plate voltage 750 V, and maximum plate dissipation 30 W. The archive does not yet hold a photographed example of this type.

BrandTUNG-SOL
ClassPower Pentode
Base5-pin
Filament12.6 V @ 0.45 mA

Construction

Primary TypePentode
EnvelopeGlass Bulb
Base MaterialMicanol
SectionsSingle

Filament / Heater

MaterialCoated

Absolute Maximum Ratings

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Class C R-F Amplifier or Oscillator (Suppressor 0V)500 V———100 mA
Class C R-F Amplifier or Oscillator (Suppressor 0V)750 V———100 mA
Suppressor Modulated Class C Amplifier500 V———

Application Notes

The RK-45 may be operated at the maximum ratings at frequencies up to 30 megacycles. Above 30 megacycles, plate voltage should be lowered to prevent excessive plate dissipation.

Filters

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Manufacturers

Brands

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    Plate Voltage
    750 V
    Plate Dissipation30 W
    Grid 2 Voltage250 V
    Grid 1 Voltage-200 V
    Cathode Current110 mA

    Audio Performance

    Key Features
    • Coated filament
    • Medium Metal Cap
    • Micanol Base
    • Designed for portable equipment
    50 mA
    Suppressor Modulated Class C Amplifier750 V———55 mA