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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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237 vacuum tube outline illustration

Tube-number record

237

0 archive entries

237 is a tube type in the TubeDatabase archive (class: Triode). Recorded specifications: construction Triode, socket 5-pin, maximum plate voltage 250 V, and maximum plate dissipation 1 W. The archive does not yet hold a photographed example of this type.

ClassTriode
Base5-pin
Filament6.3 V @ 0.3 mA

Construction

Primary TypeTriode
EnvelopeST-12
SectionsSingle

Filament / Heater

Heater NotesAC or DC

Absolute Maximum Ratings

Plate Voltage250 V

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Class A Amplifier250 V110084009.27.5 mA
Class A Amplifier90 V9251100010.22.7 mA

Application Notes

Used as detector, amplifier, or oscillator.

Filters

0 tubes found

Manufacturers

Brands

    0 results
    Plate Dissipation
    1 W

    Audio Performance

    Key Features
    • Indirectly heated cathode
    • General purpose triode