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

Other (3,257 tube types), Pre (2,314 tube types), Power (1,030 tube types), Rectifier (740 tube types)
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Tube-number record

27

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ClassTriode
Filament2.5 V @ 1.75 mA

Construction

Primary TypeTriode
SectionsSingle

Filament / Heater

Heater NotesIndirectly heated cathode

Absolute Maximum Ratings

Plate Voltage250 V

Audio Performance

Key Features
  • Detector
  • Amplifier

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Class A Amplifier180 V870900095.2 mA

Application Notes

Commonly used as a detector or amplifier in older radio receivers.

Datasheets

Datasheet: 27.pdf

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

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