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Tube Database (7,341 tube types · 1,270 archive entries)

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31LR8 vacuum tube outline illustration

Tube-number record

31LR8

0 archive entries

31LR8 is a tube type in the TubeDatabase archive (class: Beam Power Pentode Amplifier / High Mu Triode Oscillator). Recorded specifications: brand Sylvania, construction Multi-section, and socket Noval (B9A). The archive does not yet hold a photographed example of this type.

BrandSylvania
ClassBeam Power Pentode Amplifier / High Mu Triode Oscillator
BaseNoval (B9A)
Filament31.5 V @ 300 mA

Construction

Primary TypeMulti-section
EnvelopeT-12
SectionsTriode, Pentode

Filament / Heater

Warm-up Time11s
Heater NotesSeries circuit

Absolute Maximum Ratings

Application Notes

The triode section is intended for service as a vertical oscillator and the pentode section is designed for vertical deflection amplifier service.

Datasheets

Datasheet: 31LR8.pdf

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Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.

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    Audio Performance

    Key Features
    • Color Television Type
    • Beam Power Pentode Amplifier
    • High Mu Triode Oscillator