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

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Tube-number record

304TH

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BrandEitel-McCullough, Inc. (Eimac)
ClassMedium-Mu Triode
Base4-pin

Construction

Primary TypeTriode
EnvelopeGlass
SectionsSingle

Filament / Heater

MaterialThoriated tungsten

Absolute Maximum Ratings

Plate Voltage3000 V
Plate Dissipation300 W
Cathode Current900 mA

Audio Performance

Power Output1400 W
Key Features
  • Thoriated tungsten filament
  • Medium-mu
  • High power oscillator
  • Class B Modulator
  • RF Amplifier

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Class B Audio (2 tubes)3000 V16700—20667 mA
Class C Telegraphy3000 V16700—20500 mA

Application Notes

Averaged over any sinusoidal audio frequency cycle. Frequency for maximum ratings is 40 mc.

Datasheets

Datasheet: 304TH.pdf

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

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