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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

PL-8295/PL-172

0 archive entries

PL-8295/PL-172 is a tube type in the TubeDatabase archive (class: Beam Pentode). Recorded specifications: brand Penta Laboratories, construction Beam tetrode / beam power, base Metal/Ceramic, socket 7-pin (non-miniature), maximum plate voltage 3000 V, and maximum plate dissipation 1000 W. The archive does not yet hold a photographed example of this type.

BrandPenta Laboratories
ClassBeam Pentode
Base7-pin (non-miniature)
Filament6 V @ 3.2 mA

Construction

Primary TypeBeam tetrode / beam power
EnvelopeGlass
Base MaterialMetal/Ceramic
SectionsSingle

Filament / Heater

Heater NotesMinimum cathode heating time recommended before applying plate voltage.

Absolute Maximum Ratings

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Class AB1 Linear R-F Amplifier3000 V23000—3.4800 mA
Class C CW or FM Amplifier3000 V———820 mA

Application Notes

The tube is particularly well suited for low-distortion Class-AB1 linear r-f amplifier service. It should be supported by either the suppressor grid terminal ring or the anode cooler; do not support by glass or pins.

Filters

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Manufacturers

Brands

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    Plate Voltage3000 V
    Plate Dissipation1000 W
    Grid 2 Voltage600 V
    Grid 1 Voltage-200 V
    Cathode Current1000 mA

    Audio Performance

    Power Output1500 W
    Key Features
    • Forced-air cooled
    • 1000-watt plate dissipation
    • High power gain
    • Low plate voltage efficiency
    • Low-distortion linear r-f amplification