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» Vacuum tubes by use » HAM Radio tubes » GU-74B / GU74-B / GU74B / 4CX800A tetrode tube (used)
GU-74B / GU74-B / GU74B / 4CX800A tetrode tube (used)
Manufacturer: Svetlana factory
GU-74B / GU74-B / GU74B / 4CX800A tetrode tube (used)
GU-74B / GU74-B / GU74B / 4CX800A tetrode tube (used)
$140.00/ea
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Average delivery time to United States is 18 days.
The GU-74b / 4CX800A Svetlana tetrode is used in wide-band non-tunable amplifiers and for single-sideband power amplification in stationary and mobile RF equipment. It is useful at full ratings through 250MHz. The GU-74b is fully equivalent to the modern 4CX800A tube. Good used condition.

  • Name: GU74B;
  • Type: tetrode;
  • Cathode type: oxide, indirect heating;
  • Application field: power amplification in broadcasting and SSB equipment;
  • Brief application: amplification;
  • Envelope: metal-ceramic;
  • Cooling method: forced air;
  • Dimensions: 90mm x 71mm;
  • Mass: 0.55 kg;
  • Filament voltage: 12.6 V;
  • Filament current: 3.3 - 3.9 A;
  • Mutual conductance: 26 to 38 mA/V;
  • Output power: 0.6 kW;
  • Maximum anode voltage: 2kV/4kV in peak;
  • Maximum operating frequency: 150MHz.
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