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

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Tube-number record

3X3000A7

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BrandEimac
ClassHigh-Mu Power Triode

Construction

Primary TypeTriode
EnvelopeExternal Anode
SectionsSingle

Filament / Heater

MaterialThoriated-tungsten

Absolute Maximum Ratings

Plate Voltage5000 V
Plate Dissipation3000 W
Cathode Current2500 mA

Audio Performance

Power Output11000 W
Key Features
  • Zero-bias Class-B amplifier
  • External-anode
  • Thoriated-tungsten filament
  • High-mu

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Class-B AF Modulator (Two Tubes)4000 V——2004000 mA
Class-B Grounded-Grid RF Linear (Single Tone)4000 V——2002000 mA
Class-B Grounded-Grid RF Linear (Single Tone)5000 V——200

Application Notes

Intended for use as a zero-bias Class-B amplifier in audio or radio-frequency applications. Grounded-grid operation is attractive since a power gain of over twenty times can be obtained.

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    1560 mA