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

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20PA91 vacuum tube outline illustration

Tube-number record

20PA91

0 archive entries

20PA91 is a tube type in the TubeDatabase archive (class: Phototube). Recorded specifications: brand Tesla, construction Other / special, base Bakelite, socket Flexible / flying leads, and maximum plate voltage 500 V. The archive does not yet hold a photographed example of this type.

BrandTesla
ClassPhototube
BaseFlexible / flying leads

Construction

Primary TypeOther / special
EnvelopeMiniature
Base MaterialBakelite

Filament / Heater

Absolute Maximum Ratings

Plate Voltage500 V
Cathode Current0.003 mA

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Standard100 V———0.015 mA

Application Notes

Suitable for various photoelectric measurements and devices working with visible and infrared sources.

Datasheets

Datasheet: 20PA91.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
    • No lag (pracuje bez setrvacnosti)
    • Sensitive to visible and infrared radiation
    • Vacuum type