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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

220

0 archive entries

ClassPower Triode
Base4-pin

Construction

Primary TypeTriode
EnvelopeGlass
SectionsSingle

Filament / Heater

Absolute Maximum Ratings

Plate Voltage135 V
Grid 1 Voltage-22.5 V

Audio Performance

Key Features
  • Filamentary power amplifier triode
  • Dry-cell operation

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Class A Amplifier135 V52563003.36.5 mA

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